Where has the site gone?

1
The forum site seems to have disappeared!!!
2
Nah .... site is still working in new format here
Ken


To: Syncro_T3_Australia@yahoogroups.com
From: gregespo73@yahoo.com
Date: Fri, 6 Sep 2013 16:39:30 -0700
Subject: [Syncro_T3_Australia] Where has the site gone?

 

The forum site seems to have disappeared!!!

3
Back up now, was not working this morning.

From: Ken Garratt <unclekenz@hotmail.com>
To: _T3_Australia forum Syncro <syncro_t3_australia@yahoogroups.com>
Sent: Saturday, 7 September 2013 10:26 AM
Subject: RE: [Syncro_T3_Australia] Where has the site gone?
 
Nah .... site is still working in new format here
Ken
To: Syncro_T3_Australia@yahoogroups.com From: gregespo73@yahoo.com Date: Fri, 6 Sep 2013 16:39:30 -0700 Subject: [Syncro_T3_Australia] Where has the site gone?  
The forum site seems to have disappeared!!!
4

Greg,

The forum site is still there but has been changed by Yahoo and by me.

Yahoo has introduced a completely new format for everything – without any notice – and all group owners were caught flat footed!  Some of it works and some of it doesn’t.  One part that doesn’t work is that we are stuck with a mountain bike man on the home page instead of a Syncro.

I have changed the joining procedure to try to get around the prospective members who don’t take a blind bit of notice of what is written on the home page and try to join direct through Yahoo.  I changed the membership to ‘invitation only’ but this hid the information on the front page and was self-defeating, so I had to revert to the “by approval” setting.

I am currently considering other avenues of establishing a forum but any change would necessitate archiving all of the data currently on the Yahoo format.  That would involve a lot of work, as would the actual migration of data and members to the new site.

Les

From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of Greg Esposito
Sent: 07 September 2013 09:40
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Where has the site gone?

The forum site seems to have disappeared!!!

5
As always Les, thankyou for your hard work. I understand the yahoo issues that are going on at the moment. Yesterday morning however the site was completely down. I hit my "favourite" link and nothing. Then I google searched and found the link, clicked on it and nothing! Anyway glad the site is at least up again.

From: Les Harris <leslieharris@optusnet.com.au>
To: Syncro_T3_Australia@yahoogroups.com
Sent: Sunday, 8 September 2013 10:16 AM
Subject: RE: [Syncro_T3_Australia] Where has the site gone?
 
Greg,
The forum site is still there but has been changed by Yahoo and by me.
Yahoo has introduced a completely new format for everything – without any notice – and all group owners were caught flat footed!  Some of it works and some of it doesn’t.  One part that doesn’t work is that we are stuck with a mountain bike man on the home page instead of a Syncro.
I have changed the joining procedure to try to get around the prospective members who don’t take a blind bit of notice of what is written on the home page and try to join direct through Yahoo.  I changed the membership to ‘invitation only’ but this hid the information on the front page and was self-defeating, so I had to revert to the “by approval” setting.
I am currently considering other avenues of establishing a forum but any change would necessitate archiving all of the data currently on the Yahoo format.  That would involve a lot of work, as would the actual migration of data and members to the new site.
Les
From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of Greg Esposito
Sent: 07 September 2013 09:40
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Where has the site gone?
The forum site seems to have disappeared!!!
6
Dear All,

Does anyone have the:

rolling radius,
rolling diameter,
rolling circumference

of the original stock Syncro 14" wheels with the correct tyres fitted ?

Peter













,
7

Peter,

I will have this in my notes somewhere.  What does the question relate to?  The Australian-delivered 5.43 gearing is so low that increasing the rolling circumference somewhat will give you lower RPM per unit of speed, not a bad thing in a country that is mainly flat.  Changing to 15” rims achieves this.  Such an increase does not noticeably affect first and second gear; in any event, there is still the granny gear.

Les

From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of Peter Schweinsberg
Sent: 16 September 2013 17:31
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Syncro wheels technical.

Dear All,
Does anyone have the:
rolling radius,
rolling diameter,
rolling circumference
of the original stock Syncro 14" wheels with the correct tyres fitted ?
Peter













,

8

 http://www.syncro.ca/tiresize/



--- In syncro_t3_australia@yahoogroups.com, <leslieharris@...> wrote:

Peter,

I will have this in my notes somewhere.  What does the question relate to?  The Australian-delivered 5.43 gearing is so low that increasing the rolling circumference somewhat will give you lower RPM per unit of speed, not a bad thing in a country that is mainly flat.  Changing to 15” rims achieves this.  Such an increase does not noticeably affect first and second gear; in any event, there is still the granny gear.

Les

From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of Peter Schweinsberg
Sent: 16 September 2013 17:31
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Syncro wheels technical.

Dear All,
Does anyone have the:
rolling radius,
rolling diameter,
rolling circumference
of the original stock Syncro 14" wheels with the correct tyres fitted ?
Peter













,

9
Thanks Les,

I hear where you are coming from, but if you can find the data for me it would help.

I have an Australian delivery stock 14" Syncro window van fitted as a 7 seat Caravell with decoupler and front / back diff locks.
I take it seriously off road as well as on tour.
It has a very accurate speedo.
I'm currently running the last of my 14" Michelin CXs,
the ones I have tried to use from the beginning, which I love,
but Michelin have stopped making them.

I have put my name on the list for a set plus 2 spares Mefro 15" wheels,
and am currently looking at Michelin Latitude Cross tyres for them and am just doing the sums.
There are two sizes which will do the job and I have the diameters, circumferences and Load Indexes for each .
I'd like to compare the original official numbers with what I have been given by Michelin for these 15" ones.

If it's not available, I'll measure one of my wheels while on the car and try to make an allowance for wear.

Thats where I'm coming from.


Increasing diameter increases clearance and decreases revs and torque.
Decreasing diameter decreases clearance but increases revs and torque.
Whichever way you go it is a compromise.

I use the Gelände gear often,
when I need to roll slowly with maximum torque,
such as going up or down steep rough hills.
Also in soft sand.

When I get my new wheels and tyres,
I'll be fitting them with tyre pressure transmitters so that I can adjust pressures for highway, rough gravel, and particularly sand.

Peter


--Original Message Text---
From: Les Harris
Date: Mon, 16 Sep 2013 17:44:38 +1000

v\:* {behavior:url(#default#VML);}o\:* {behavior:url(#default#VML);}w\:* {behavior:url(#default#VML);}.shape {behavior:url(#default#VML);}



Peter,

I will have this in my notes somewhere. What does the question relate to? The Australian-delivered 5.43 gearing is so low that increasing the rolling circumference somewhat will give you lower RPM per unit of speed, not a bad thing in a country that is mainly flat. Changing to 15 rims achieves this. Such an increase does not noticeably affect first and second gear; in any event, there is still the granny gear.

Les


From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of Peter Schweinsberg
Sent: 16 September 2013 17:31
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Syncro wheels technical.


Dear All,
Does anyone have the:
rolling radius,
rolling diameter,
rolling circumference
of the original stock Syncro 14" wheels with the correct tyres fitted ?
Peter













,








10

Peter,

That’s comprehensive.

Let’s go over some of the basics of tyres on vehicles.

There is no such thing as a rolling circumference on a chart that applies to all vehicles. Not only does this measurement vary from vehicle to vehicle, it also varies from front to back axle. (Important on a Syncro!) Not only do these numbers vary, but there is also a variation according to speed. The only accurate measurement is the one that you do yourself, using the standard method used in vehicle development. This process is described in a document in the Files section of the website. This does not account for speed (it needs some sophisticated gear to measure that!) but it is adequate for your purpose. Needless to say, accurate measurement is dependent on correct tyre pressures or the pressures that you elect for day to day driving. From this, you will gather that there isn’t an ‘official’ measurement because it varies widely between tyre makes. You can apply this procedure to your current footware and keep the results as a comparison against any size tyre set that you use in the future.

Les

From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of Peter Schweinsberg
Sent: 16 September 2013 18:37
To: Syncro_T3_Australia@yahoogroups.com
Subject: RE: [Syncro_T3_Australia] Syncro wheels technical.

 

 

Thanks Les,

I hear where you are coming from, but if you can find the data for me it would help.

I have an Australian delivery stock 14" Syncro window van fitted as a 7 seat Caravell with decoupler and front / back diff locks.
I take it seriously off road as well as on tour.
It has a very accurate speedo.
I'm currently running the last of my 14" Michelin CXs,
the ones I have tried to use from the beginning, which I love,
but Michelin have stopped making them.

I have put my name on the list for a set plus 2 spares Mefro 15" wheels,
and am currently looking at Michelin Latitude Cross tyres for them and am just doing the sums.
There are two sizes which will do the job and I have the diameters, circumferences and Load Indexes for each .
I'd like to compare the original official numbers with what I have been given by Michelin for these 15" ones.

If it's not available, I'll measure one of my wheels while on the car and try to make an allowance for wear.

Thats where I'm coming from.


Increasing diameter increases clearance and decreases revs and torque.
Decreasing diameter decreases clearance but increases revs and torque.
Whichever way you go it is a compromise.

I use the Gelände gear often,
when I need to roll slowly with maximum torque,
such as going up or down steep rough hills.
Also in soft sand.

When I get my new wheels and tyres,
I'll be fitting them with tyre pressure transmitters so that I can adjust pressures for highway, rough gravel, and particularly sand.

Peter

11
two 14 inch sizes are stock,
185 R 14 C
205/70 R 14 .
additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
There is also a 205/70 R 14  97R Reinforced tire listed on the stock tire ( I mean tyre )  sticker on a syncro.

that's 5 variations in the specs you seek right there, depending on how accurate you want to be.
Perhaps an average is what would work for you. 


On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:
 

Dear All,

Does anyone have the:

rolling radius,
rolling diameter,
rolling circumference

of the original stock Syncro 14" wheels with the correct tyres fitted ?

Peter













,


12
Hi everyone,
I am rather bemused by all this discussion about wheel and tyre sizes and diameters. A lot of the comments show a fundamental misunderstanding of the basic principles, which lets face it are little more than upper primary school maths.

I have a simple formula which gives results very close to most of the published figures of the tyre manufacturers.
[(Section width in mm x aspect ratio %) x 2] + rim diameter in mm = total tyre diameter. Eg. the diameter of the 205/80x14 OE tyre on Australian syncros is 205 mm x 0.8 x 2 + 355.6 mm = 683.6 mm. I am planning to fit 225/75R16 Cooper AT3 tyres to my syncro. My calculation for this size is 743.9. Coopers figures are 746.5 for the AT3 & 750 for the ST Maxx. Bridgestone and Yokahama for example list 744, so there is some variation, particularly with AT and MT tyres due to tread depth. On my previous Syncro '97-'02 I ran 215/80R15 (725mm OD) Yokohama SD05 on 6x15 deep well rims on 14" centres with standard WBX without any problems. 

Most of the original tyre sizes listed for the Syncro are far too small in my opinion. Most of the medium sized SUV's these days and many cars run larger sizes. The Syncro is built to go offroad so the bigger the better. There is no way I would run smaller than say 700-720 OD. A standard OE size for 4WD utes for many years has been 205R16 (OD 732-736). A good option and a huge range available.

Load and speed ratings though should equal or exceed the minimums.

A Subi EJ25 and revised gearing will be combined with my tyres. More about that later.

I have views on rolling circumference too. Maybe one for another time.

My two bobs worth.

Cheers,

Bruce.





From: Scott Daniel <ScottDaniel@turbovans.com>
To: Syncro_T3_Australia@yahoogroups.com
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 4:47 AM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.

 
two 14 inch sizes are stock,
185 R 14 C
205/70 R 14 .
additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
There is also a 205/70 R 14  97R Reinforced tire listed on the stock tire ( I mean tyre )  sticker on a syncro.

that's 5 variations in the specs you seek right there, depending on how accurate you want to be.
Perhaps an average is what would work for you. 


On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:
 
Dear All,

Does anyone have the:

rolling radius,
rolling diameter,
rolling circumference

of the original stock Syncro 14" wheels with the correct tyres fitted ?

Peter













,



13
Thanks everyone for this discussion.

It's getting a bit technical.

I'm just looking for some numbers so that I can compare the original tyres with tyres that I am looking at, which are on the market. I have a very accurate speedo, so changing the diameter will alter it one way or the other.
Manufacturers do publish this data, so having the radius/diameter/circumference of my old 14" Michelin CXs will enable me to make comparisons.

I hear what people say about increasing sizes to increase ground clearance and lower engine speeds, etc., but this is no advantage where I sometimes drive, where having an engine that will pull at 600 rpm in G is.

What I'll do soon is:
Put a chalk mark on a tyre and the road, roll the car forward one revolution and make another mark on the road.
I'll then have the circumference from which I can calculate the current diameter.
I can make an allowance for wear, and then be in a position to compare with the tyres I am considering buying.

Thanks Bruce for your note on ODs that you prefer.
My present best choice are Michelin Latitude Cross ATs, here I'm looking at are are 669 and 697 mm respectively.

Peter






--Original Message Text---
From: Bruce Morphett
Date: Mon, 16 Sep 2013 19:44:36 -0700 (PDT)

Hi everyone,
I am rather bemused by all this discussion about wheel and tyre sizes and diameters. A lot of the comments show a fundamental misunderstanding of the basic principles, which lets face it are little more than upper primary school maths.


I have a simple formula which gives results very close to most of the published figures of the tyre manufacturers.
[(Section width in mm x aspect ratio %) x 2] + rim diameter in mm = total tyre diameter. Eg. the diameter of the 205/80x14 OE tyre on Australian syncros is 205 mm x 0.8 x 2 + 355.6 mm = 683.6 mm. I am planning to fit 225/75R16 Cooper AT3 tyres to my syncro. My calculation for this size is 743.9. Coopers figures are 746.5 for the AT3 & 750 for the ST Maxx. Bridgestone and Yokahama for example list 744, so there is some variation, particularly with AT and MT tyres due to tread depth. On my previous Syncro '97-'02 I ran 215/80R15 (725mm OD) Yokohama SD05 on 6x15 deep well rims on 14" centres with standard WBX without any problems.


Most of the original tyre sizes listed for the Syncro are far too small in my opinion. Most of the medium sized SUV's these days and many cars run larger sizes. The Syncro is built to go offroad so the bigger the better. There is no way I would run smaller than say 700-720 OD. A standard OE size for 4WD utes for many years has been 205R16 (OD 732-736). A good option and a huge range available.


Load and speed ratings though should equal or exceed the minimums.


A Subi EJ25 and revised gearing will be combined with my tyres. More about that later.


I have views on rolling circumference too. Maybe one for another time.


My two bobs worth.


Cheers,


Bruce.










From: Scott Daniel <ScottDaniel@turbovans.com>
To: Syncro_T3_Australia@yahoogroups.com
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 4:47 AM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.


two 14 inch sizes are stock,
185 R 14 C
205/70 R 14 .
additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
There is also a 205/70 R 14 97R Reinforced tire listed on the stock tire ( I mean tyre ) sticker on a syncro.

that's 5 variations in the specs you seek right there, depending on how accurate you want to be.
Perhaps an average is what would work for you.



On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:

Dear All,

Does anyone have the:

rolling radius,
rolling diameter,
rolling circumference

of the original stock Syncro 14" wheels with the correct tyres fitted ?

Peter













,
14
Hi Bruce, with that size tyre you will probably need to trim the back part of the front wheel arch. You will also find it comes very close to the rear trailing arm. Just need to get wheel offset & width right. Eddie.

--- In Syncro_T3_Australia@yahoogroups.com, Bruce Morphett <bruce.morphett@...> wrote:
>
> Hi everyone,
> I am rather bemused by all this discussion about wheel and tyre sizes and diameters. A lot of the comments show a fundamental misunderstanding of the basic principles, which lets face it are little more than upper primary school maths.
>
> I have a simple formula which gives results very close to most of the published figures of the tyre manufacturers.
> [(Section width in mm x aspect ratio %) x 2] + rim diameter in mm = total tyre diameter. Eg. the diameter of the 205/80x14 OE tyre on Australian syncros is 205 mm x 0.8 x 2 + 355.6 mm = 683.6 mm. I am planning to fit 225/75R16 Cooper AT3 tyres to my syncro. My calculation for this size is 743.9. Coopers figures are 746.5 for the AT3 & 750 for the ST Maxx. Bridgestone and Yokahama for example list 744, so there is some variation, particularly with AT and MT tyres due to tread depth. On my previous Syncro '97-'02 I ran 215/80R15 (725mm OD) Yokohama SD05 on 6x15 deep well rims on 14" centres with standard WBX without any problems.Â
>
> Most of the original tyre sizes listed for the Syncro are far too small in my opinion. Most of the medium sized SUV's these days and many cars run larger sizes. The Syncro is built to go offroad so the bigger the better. There is no way I would run smaller than say 700-720 OD. A standard OE size for 4WD utes for many years has been 205R16 (OD 732-736). A good option and a huge range available.
>
> Load and speed ratings though should equal or exceed the minimums.
>
> A Subi EJ25 and revised gearing will be combined with my tyres. More about that later.
>
> I have views on rolling circumference too. Maybe one for another time.
>
> My two bobs worth.
>
> Cheers,
>
> Bruce.
>
>
>
>
>
>
> ________________________________
> From: Scott Daniel <ScottDaniel@...>
> To: Syncro_T3_Australia@yahoogroups.com
> Cc: Peter Schweinsberg <peter@...>
> Sent: Tuesday, 17 September 2013 4:47 AM
> Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
>
>
>
> Â
> two 14 inch sizes are stock,
> 185 R 14 C
> 205/70 R 14 .
> additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
> There is also a 205/70 R 14Â 97R Reinforced tire listed on the stock tire ( I mean tyre )Â sticker on a syncro.
>
> that's 5 variations in the specs you seek right there, depending onhow accurate you want to be.
> Perhaps an average is what would work for you.Â
>
>
>
> On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:
>
> Â
> >Dear All,
> >
> >Does anyone have the:
> >
> >rolling radius,
> >rolling diameter,
> >rolling circumference
> >
> >of the original stock Syncro 14" wheels with the
> correct tyres fitted ?
> >
> >Peter
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >,
> >
>
15

Have a look here Peter :

http://www.tacomaworld.com/forum/tirecalc.php?tires=215-75r14-215-75r15


Mark



--- In Syncro_T3_Australia@yahoogroups.com, <syncro_t3_australia@yahoogroups.com> wrote:

Thanks Les,

I hear where you are coming from, but if you can find the data for me it would help.

I have an Australian delivery stock 14" Syncro window van fitted as a 7 seat Caravell with decoupler and front / back diff locks.
I take it seriously off road as well as on tour.
It has a very accurate speedo.
I'm currently running the last of my 14" Michelin CXs,
the ones I have tried to use from the beginning, which I love,
but Michelin have stopped making them.

I have put my name on the list for a set plus 2 spares Mefro 15" wheels,
and am currently looking at Michelin Latitude Cross tyres for them and am just doing the sums.
There are two sizes which will do the job and I have the diameters, circumferences and Load Indexes for each .
I'd like to compare the original official numbers with what I have been given by Michelin for these 15" ones.

If it's not available, I'll measure one of my wheels while on the car and try to make an allowance for wear.

Thats where I'm coming from.


Increasing diameter increases clearance and decreases revs and torque.
Decreasing diameter decreases clearance but increases revs and torque.
Whichever way you go it is a compromise.

I use the Gelände gear often,
when I need to roll slowly with maximum torque,
such as going up or down steep rough hills.
Also in soft sand.

When I get my new wheels and tyres,
I'll be fitting them with tyre pressure transmitters so that I can adjust pressures for highway, rough gravel, and particularly sand.

Peter


--Original Message Text---
From: Les Harris
Date: Mon, 16 Sep 2013 17:44:38 +1000

v\:* {behavior:url(#default#VML);}o\:* {behavior:url(#default#VML);}w\:* {behavior:url(#default#VML);}.shape {behavior:url(#default#VML);}



Peter,

I will have this in my notes somewhere. What does the question relate to? The Australian-delivered 5.43 gearing is so low that increasing the rolling circumference somewhat will give you lower RPM per unit of speed, not a bad thing in a country that is mainly flat. Changing to 15 rims achieves this. Such an increase does not noticeably affect first and second gear; in any event, there is still the granny gear.

Les


From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com] On Behalf Of Peter Schweinsberg
Sent: 16 September 2013 17:31
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Syncro wheels technical.


Dear All,
Does anyone have the:
rolling radius,
rolling diameter,
rolling circumference
of the original stock Syncro 14" wheels with the correct tyres fitted ?
Peter













,








16
Bruce, you might have to add wheel arch mods to your list. Greg E

From: Bruce Morphett <bruce.morphett@yahoo.com.au>
To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 12:44 PM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
Hi everyone,
I am rather bemused by all this discussion about wheel and tyre sizes and diameters. A lot of the comments show a fundamental misunderstanding of the basic principles, which lets face it are little more than upper primary school maths.

I have a simple formula which gives results very close to most of the published figures of the tyre manufacturers.
[(Section width in mm x aspect ratio %) x 2] + rim diameter in mm = total tyre diameter. Eg. the diameter of the 205/80x14 OE tyre on Australian syncros is 205 mm x 0.8 x 2 + 355.6 mm = 683.6 mm. I am planning to fit 225/75R16 Cooper AT3 tyres to my syncro. My calculation for this size is 743.9. Coopers figures are 746.5 for the AT3 & 750 for the ST Maxx. Bridgestone and Yokahama for example list 744, so there is some variation, particularly with AT and MT tyres due to tread depth. On my previous Syncro '97-'02 I ran 215/80R15 (725mm OD) Yokohama SD05 on 6x15 deep well rims on 14" centres with standard WBX without any problems. 

Most of the original tyre sizes listed for the Syncro are far too small in my opinion. Most of the medium sized SUV's these days and many cars run larger sizes. The Syncro is built to go offroad so the bigger the better. There is no way I would run smaller than say 700-720 OD. A standard OE size for 4WD utes for many years has been 205R16 (OD 732-736). A good option and a huge range available.

Load and speed ratings though should equal or exceed the minimums.

A Subi EJ25 and revised gearing will be combined with my tyres. More about that later.

I have views on rolling circumference too. Maybe one for another time.

My two bobs worth.

Cheers,

Bruce.





From: Scott Daniel <ScottDaniel@turbovans.com>
To: Syncro_T3_Australia@yahoogroups.com
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 4:47 AM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
two 14 inch sizes are stock,
185 R 14 C
205/70 R 14 .
additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
There is also a 205/70 R 14  97R Reinforced tire listed on the stock tire ( I mean tyre )  sticker on a syncro.

that's 5 variations in the specs you seek right there, depending on how accurate you want to be.
Perhaps an average is what would work for you. 


On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:
 
Dear All,

Does anyone have the:

rolling radius,
rolling diameter,
rolling circumference

of the original stock Syncro 14" wheels with the correct tyres fitted ?

Peter













,
17
Tyre sizes are rubbery figures that vary from brand to brand and even for different treads within a brand.  BFG Mud tyres can be up to 25mm taller than All Terrains but not for all sizes.  Best to measure your old ones yourself then find the new one you want and measure and compare the percentage difference.  Without actually measuring yourself it's a lottery.  Getting some old tyres in the new size you want from the scrap pile for free from a tyre dealer to try before you buy can save making the wrong choice. Also will highlight any rubbing issues

From: Peter Schweinsberg <peter@peterandval.com>
To: Bruce Morphett <bruce.morphett@yahoo.com.au>; "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
Sent: Tuesday, 17 September 2013 5:48 PM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
Thanks everyone for this discussion.

It's getting a bit technical.

I'm just looking for some numbers so that I can compare the original tyres with tyres that I am looking at, which are on the market. I have a very accurate speedo, so changing the diameter will alter it one way or the other.
Manufacturers do publish this data, so having the radius/diameter/circumference of my old 14" Michelin CXs will enable me to make comparisons.

I hear what people say about increasing sizes to increase ground clearance and lower engine speeds, etc., but this is no advantage where I sometimes drive, where having an engine that will pull at 600 rpm in G is.

What I'll do soon is:
Put a chalk mark on a tyre and the road, roll the car forward one revolution and make another mark on the road.
I'll then have the circumference from which I can calculate the current diameter.
I can make an allowance for wear, and then be in a position to compare with the tyres I am considering buying.

Thanks Bruce for your note on ODs that you prefer.
My present best choice are Michelin Latitude Cross ATs, here I'm looking at are are 669 and 697 mm respectively.

Peter






--Original Message Text---
From: Bruce Morphett
Date: Mon, 16 Sep 2013 19:44:36 -0700 (PDT)

Hi everyone,
I am rather bemused by all this discussion about wheel and tyre sizes and diameters. A lot of the comments show a fundamental misunderstanding of the basic principles, which lets face it are little more than upper primary school maths.


I have a simple formula which gives results very close to most of the published figures of the tyre manufacturers.
[(Section width in mm x aspect ratio %) x 2] + rim diameter in mm = total tyre diameter. Eg. the diameter of the 205/80x14 OE tyre on Australian syncros is 205 mm x 0.8 x 2 + 355.6 mm = 683.6 mm. I am planning to fit 225/75R16 Cooper AT3 tyres to my syncro. My calculation for this size is 743.9. Coopers figures are 746.5 for the AT3 750 for the ST Maxx. Bridgestone and Yokahama for example list 744, so there is some variation, particularly with AT and MT tyres due to tread depth. On my previous Syncro '97-'02 I ran 215/80R15 (725mm OD) Yokohama SD05 on 6x15 deep well rims on 14" centres with standard WBX without any problems.


Most of the original tyre sizes listed for the Syncro are far too small in my opinion. Most of the medium sized SUV's these days and many cars run larger sizes. The Syncro is built to go offroad so the bigger the better. There is no way I would run smaller than say 700-720 OD. A standard OE size for 4WD utes for many years has been 205R16 (OD 732-736). A good option and a huge range available.


Load and speed ratings though should equal or exceed the minimums.


A Subi EJ25 and revised gearing will be combined with my tyres. More about that later.


I have views on rolling circumference too. Maybe one for another time.


My two bobs worth.


Cheers,


Bruce.










From: Scott Daniel <ScottDaniel@turbovans.com>
To: Syncro_T3_Australia@yahoogroups.com
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 4:47 AM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.


two 14 inch sizes are stock,
185 R 14 C
205/70 R 14 .
additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
There is also a 205/70 R 14 97R Reinforced tire listed on the stock tire ( I mean tyre ) sticker on a syncro.

that's 5 variations in the specs you seek right there, depending on how accurate you want to be.
Perhaps an average is what would work for you.



On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:

Dear All,

Does anyone have the:

rolling radius,
rolling diameter,
rolling circumference

of the original stock Syncro 14" wheels with the correct tyres fitted ?

Peter













,
















18
Greg,
Yes, as far as I can tell minor at the trailing edge of the front arches & trimming of the lip of the rear trailing arms.
I notice a couple of forum members have 30x9.5R15 (OD 744-750) on their syncros. I would be interested in their experiences.

Cheers,
Bruce

From: Greg Esposito <gregespo73@yahoo.com>
To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
Sent: Tuesday, 17 September 2013 8:48 PM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.

 
Bruce, you might have to add wheel arch mods to your list. Greg E

From: Bruce Morphett <bruce.morphett@yahoo.com.au>
To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 12:44 PM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
Hi everyone,
I am rather bemused by all this discussion about wheel and tyre sizes and diameters. A lot of the comments show a fundamental misunderstanding of the basic principles, which lets face it are little more than upper primary school maths.

I have a simple formula which gives results very close to most of the published figures of the tyre manufacturers.
[(Section width in mm x aspect ratio %) x 2] + rim diameter in mm = total tyre diameter. Eg. the diameter of the 205/80x14 OE tyre on Australian syncros is 205 mm x 0.8 x 2 + 355.6 mm = 683.6 mm. I am planning to fit 225/75R16 Cooper AT3 tyres to my syncro. My calculation for this size is 743.9. Coopers figures are 746.5 for the AT3 & 750 for the ST Maxx. Bridgestone and Yokahama for example list 744, so there is some variation, particularly with AT and MT tyres due to tread depth. On my previous Syncro '97-'02 I ran 215/80R15 (725mm OD) Yokohama SD05 on 6x15 deep well rims on 14" centres with standard WBX without any problems. 

Most of the original tyre sizes listed for the Syncro are far too small in my opinion. Most of the medium sized SUV's these days and many cars run larger sizes. The Syncro is built to go offroad so the bigger the better. There is no way I would run smaller than say 700-720 OD. A standard OE size for 4WD utes for many years has been 205R16 (OD 732-736). A good option and a huge range available.

Load and speed ratings though should equal or exceed the minimums.

A Subi EJ25 and revised gearing will be combined with my tyres. More about that later.

I have views on rolling circumference too. Maybe one for another time.

My two bobs worth.

Cheers,

Bruce.





From: Scott Daniel <ScottDaniel@turbovans.com>
To: Syncro_T3_Australia@yahoogroups.com
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 4:47 AM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
two 14 inch sizes are stock,
185 R 14 C
205/70 R 14 .
additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
There is also a 205/70 R 14  97R Reinforced tire listed on the stock tire ( I mean tyre )  sticker on a syncro.

that's 5 variations in the specs you seek right there, depending on how accurate you want to be.
Perhaps an average is what would work for you. 


On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:
 
Dear All,

Does anyone have the:

rolling radius,
rolling diameter,
rolling circumference

of the original stock Syncro 14" wheels with the correct tyres fitted ?

Peter













,


19
Yes to the front arch-definitely (look out for terrawagens 16" arch moulds). The rear arm lip will depend on the exact brand of tyre and offset of your rims. If you have an offset around 30et and use 8-10mm spacers and longer studs you will probably be right. Greg E

From: Bruce Morphett <bruce.morphett@yahoo.com.au>
To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
Sent: Tuesday, 17 September 2013 10:34 PM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
Greg,
Yes, as far as I can tell minor at the trailing edge of the front arches & trimming of the lip of the rear trailing arms.
I notice a couple of forum members have 30x9.5R15 (OD 744-750) on their syncros. I would be interested in their experiences.

Cheers,
Bruce

From: Greg Esposito <gregespo73@yahoo.com>
To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
Sent: Tuesday, 17 September 2013 8:48 PM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
Bruce, you might have to add wheel arch mods to your list. Greg E

From: Bruce Morphett <bruce.morphett@yahoo.com.au>
To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 12:44 PM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
Hi everyone,
I am rather bemused by all this discussion about wheel and tyre sizes and diameters. A lot of the comments show a fundamental misunderstanding of the basic principles, which lets face it are little more than upper primary school maths.

I have a simple formula which gives results very close to most of the published figures of the tyre manufacturers.
[(Section width in mm x aspect ratio %) x 2] + rim diameter in mm = total tyre diameter. Eg. the diameter of the 205/80x14 OE tyre on Australian syncros is 205 mm x 0.8 x 2 + 355.6 mm = 683.6 mm. I am planning to fit 225/75R16 Cooper AT3 tyres to my syncro. My calculation for this size is 743.9. Coopers figures are 746.5 for the AT3 & 750 for the ST Maxx. Bridgestone and Yokahama for example list 744, so there is some variation, particularly with AT and MT tyres due to tread depth. On my previous Syncro '97-'02 I ran 215/80R15 (725mm OD) Yokohama SD05 on 6x15 deep well rims on 14" centres with standard WBX without any problems. 

Most of the original tyre sizes listed for the Syncro are far too small in my opinion. Most of the medium sized SUV's these days and many cars run larger sizes. The Syncro is built to go offroad so the bigger the better. There is no way I would run smaller than say 700-720 OD. A standard OE size for 4WD utes for many years has been 205R16 (OD 732-736). A good option and a huge range available.

Load and speed ratings though should equal or exceed the minimums.

A Subi EJ25 and revised gearing will be combined with my tyres. More about that later.

I have views on rolling circumference too. Maybe one for another time.

My two bobs worth.

Cheers,

Bruce.





From: Scott Daniel <ScottDaniel@turbovans.com>
To: Syncro_T3_Australia@yahoogroups.com
Cc: Peter Schweinsberg <peter@peterandval.com>
Sent: Tuesday, 17 September 2013 4:47 AM
Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
 
two 14 inch sizes are stock,
185 R 14 C
205/70 R 14 .
additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
There is also a 205/70 R 14  97R Reinforced tire listed on the stock tire ( I mean tyre )  sticker on a syncro.

that's 5 variations in the specs you seek right there, depending on how accurate you want to be.
Perhaps an average is what would work for you. 


On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:
 
Dear All,

Does anyone have the:

rolling radius,
rolling diameter,
rolling circumference

of the original stock Syncro 14" wheels with the correct tyres fitted ?

Peter













,
20
With 30" tyres add a bit of angle grinding and panel beating up front. Again depends on offset. Eddie

--- In Syncro_T3_Australia@yahoogroups.com, Greg Esposito <gregespo73@...> wrote:
>
> Yes to the front arch-definitely (look out for terrawagens 16" arch moulds). The rear arm lip will depend on the exact brand of tyre and offset of your rims. If you have an offset around 30et and use 8-10mm spacers and longer studs you will probably be right. Greg E
>
>
> ________________________________
> From: Bruce Morphett <bruce.morphett@...>
> To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
> Sent: Tuesday, 17 September 2013 10:34 PM
> Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
>
> Â
>
> Greg,
> Yes, as far as I can tell minor at the trailing edge of the front arches & trimming of the lip of the rear trailing arms.
> I notice a couple of forum members have 30x9.5R15 (OD 744-750) on their syncros. I would be interested in their experiences.
> http://syncro.ca/tech/TireFitment.htm
>
>
> Cheers,
> Bruce
>
>
> ________________________________
> From: Greg Esposito <gregespo73@...>
> To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
> Sent: Tuesday, 17 September 2013 8:48 PM
> Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
>
> Â
> Bruce, you might have to add wheel arch mods to your list. Greg E
>
>
> ________________________________
> From: Bruce Morphett <bruce.morphett@...>
> To: "Syncro_T3_Australia@yahoogroups.com" <Syncro_T3_Australia@yahoogroups.com>
> Cc: Peter Schweinsberg <peter@...>
> Sent: Tuesday, 17 September 2013 12:44 PM
> Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
>
> Â
> Hi everyone,
> I am rather bemused by all this discussion about wheel and tyre sizes and diameters. A lot of the comments show a fundamental misunderstanding of the basic principles, which lets face it are little more than upper primary school maths.
>
> I have a simple formula which gives results very close to most of the published figures of the tyre manufacturers.
> [(Section width in mm x aspect ratio %) x 2] + rim diameter in mm = total tyre diameter. Eg. the diameter of the 205/80x14 OE tyre on Australian syncros is 205 mm x 0.8 x 2 + 355.6 mm = 683.6 mm. I am planning to fit 225/75R16 Cooper AT3 tyres to my syncro. My calculation for this size is 743.9. Coopers figures are 746.5 for the AT3 & 750 for the ST Maxx. Bridgestone and Yokahama for example list 744, so there is some variation, particularly with AT and MT tyres due to tread depth. On my previous Syncro '97-'02 I ran 215/80R15 (725mm OD) Yokohama SD05 on 6x15 deep well rims on 14" centres with standard WBX without any problems.Â
>
> Most of the original tyre sizes listed for the Syncro are far too small in my opinion. Most of the medium sized SUV's these days and many cars run larger sizes. The Syncro is built to go offroad so the bigger the better. There is no way I would run smaller than say 700-720 OD. A standard OE size for 4WD utes for many years has been 205R16 (OD 732-736). A good option and a huge range available.
>
> Load and speed ratings though should equal or exceed the minimums.
>
> A Subi EJ25 and revised gearing will be combined with my tyres. More about that later.
>
> I have views on rolling circumference too. Maybe one for another time.
>
> My two bobs worth.
>
> Cheers,
>
> Bruce.
>
>
>
>
>
>
> ________________________________
> From: Scott Daniel <ScottDaniel@...>
> To: Syncro_T3_Australia@yahoogroups.com
> Cc: Peter Schweinsberg <peter@...>
> Sent: Tuesday, 17 September 2013 4:47 AM
> Subject: Re: [Syncro_T3_Australia] Syncro wheels technical.
>
> Â
> two 14 inch sizes are stock,
> 185 R 14 C
> 205/70 R 14 .
> additionally..each is specified as C load rating front, D load rating rear, which affects the rolling specs some.
> There is also a 205/70 R 14Â 97R Reinforced tire listed on the stock tire ( I mean tyre )Â sticker on a syncro.
>
> that's 5 variations in the specs you seek right there, depending onhow accurate you want to be.
> Perhaps an average is what would work for you.Â
>
>
>
> On 9/16/2013 12:30 AM, Peter Schweinsberg wrote:
>
> Â
> >Dear All,
> >
> >Does anyone have the:
> >
> >rolling radius,
> >rolling diameter,
> >rolling circumference
> >
> >of the original stock Syncro 14" wheels with the
> correct tyres fitted ?
> >
> >Peter
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >,
> >
>