OctyVRS wheel offset limits?

pbanfield78 · 13-01-2004, 22:13

I want to put a set of 19" alloys on my VRS, i know the offset for the stock wheels is et37. alot of wheels for sale are et35 (ie audi replica wheels) which are the ones im look at. i had some rs4 put on my car by local tyre garage, they put the wheels on, then said they didnt fit properly hanging out of the arches too far!? these wheels were et35.
Does any one know or had any problems with slightly different offset wheels.
A friend of a friend has a OctyVRS also and has some audi wheels on his car at the moment i dont know the offset (trying to find out) but he has recently had lots of problems with knocking noises which has caused a need to replace steering rack, top strut mount bushes.

**TaviaRS** · 14-01-2004, 08:19

Standard wheels 7x17, ET38

What offset you need will depend on the width wheel you want to fit. 7.5 would be either ET32 or ET35

8" would be about ET30

If your friend is running 19s with standard suspension, don't go bigger than 235 tyres as they will rub.

redbaron · 14-01-2004, 09:02

not tru jon 245 will go on the fron with the correct offset... and you can get 255 on the rear......

**TaviaRS** · 14-01-2004, 09:15

But Paul, yours almost hit the arches, plus you aren't running standard suspension.

redbaron · 14-01-2004, 09:18

and what susp was rob mawer running at Tyred Goat????

IIRC was std octy susp and he ran 245's all day :thumb:

255 to rear is no prob have seen golfs running 265 without rolling the arches if offset is correct.

pbanfield78 · 14-01-2004, 09:32

my friend is running 18's and im sure he wouldnt be running any thing wider than 235 tyres.

***DGW*** · 14-01-2004, 09:58

Quote:

Originally Posted by TaviaRS

What offset you need will depend on the width wheel you want to fit. 7.5 would be either ET32 or ET35

Jon, is there any way of calculating the correct offset for standard suspension or is it a question of trying various combinations of wheel and tyre size to find out what fits?

SkodiRS · 14-01-2004, 10:01

IIRC Lloyd is running 19'', 235 35 and gets the odd rub now and again (when laden) on standard suspension (I think) but is generally fine.

Interesting the Rob could run Paul's 18'' 245s on standard suspension.......does anyone have an idea how this was possible considering it is generally accepted that 235 is the largest width possible on standard suspension.

Just trying to add to the knowledge base.

redbaron · 14-01-2004, 10:08

width is not the issue... rolling radius is the prob... as more tyres become available in lower profiles then you can get away with more..

i have now found a source for 255/30 18 and may well try these for summer...

SkodiRS · 14-01-2004, 10:31

Paul,

keep the answers coming:thumb:....got some more questions........

standard wheels are 17'' and come with 50 profile tyres...if you upgrade to 18'' and have 40/45 profile tyres isn't the rolling radius the same?

I thought the width was limited due rubbing onthe inner archor the mac strut?

redbaron · 14-01-2004, 10:48

in theory but if you change the offset to et 30 as on my split rims then the 245's clear.. 255s will just go i think...

but if you push them out too far they will start to catch on the lips of the arches... assuming the ride height is low enough to do it..

the rolling radius is key for acceleration lower the rolling radius and you drop the gearing...

hence im running 215-35-18 at the mo.. which makes it sprint quite well..
but for summer grip i will go wider for max cornering.. you will tear up the wheel arch liners with 245+ but as they need to go to aid brake cooling and intercooler air flow who cares?

13-01-2004, 22:13	#1
pbanfield78 Briskodian Join Date: Dec 2003 Location: South West Posts: 29 Thanks: 0 Thanked 0 Times in 0 Posts	OctyVRS wheel offset limits? I want to put a set of 19" alloys on my VRS, i know the offset for the stock wheels is et37. alot of wheels for sale are et35 (ie audi replica wheels) which are the ones im look at. i had some rs4 put on my car by local tyre garage, they put the wheels on, then said they didnt fit properly hanging out of the arches too far!? these wheels were et35. Does any one know or had any problems with slightly different offset wheels. A friend of a friend has a OctyVRS also and has some audi wheels on his car at the moment i dont know the offset (trying to find out) but he has recently had lots of problems with knocking noises which has caused a need to replace steering rack, top strut mount bushes.

14-01-2004, 09:02	#3
redbaron Briskodian Join Date: Jun 2003 Posts: 9,467 Thanks: 13 Thanked 65 Times in 57 Posts	not tru jon 245 will go on the fron with the correct offset... and you can get 255 on the rear...... __________________ ________________________________________ Some times I just feel like smiling.

14-01-2004, 09:18	#5
redbaron Briskodian Join Date: Jun 2003 Posts: 9,467 Thanks: 13 Thanked 65 Times in 57 Posts	and what susp was rob mawer running at Tyred Goat???? IIRC was std octy susp and he ran 245's all day :thumb: 255 to rear is no prob have seen golfs running 265 without rolling the arches if offset is correct. __________________ ________________________________________ Some times I just feel like smiling.

14-01-2004, 10:01	#8
SkodiRS BRISKODA Staff Join Date: Oct 2002 Location: darkest Hampshire Posts: 8,650 Thanks: 0 Thanked 17 Times in 13 Posts	IIRC Lloyd is running 19'', 235 35 and gets the odd rub now and again (when laden) on standard suspension (I think) but is generally fine. Interesting the Rob could run Paul's 18'' 245s on standard suspension.......does anyone have an idea how this was possible considering it is generally accepted that 235 is the largest width possible on standard suspension. Just trying to add to the knowledge base. __________________ Adrian.

14-01-2004, 10:08	#9
redbaron Briskodian Join Date: Jun 2003 Posts: 9,467 Thanks: 13 Thanked 65 Times in 57 Posts	width is not the issue... rolling radius is the prob... as more tyres become available in lower profiles then you can get away with more.. i have now found a source for 255/30 18 and may well try these for summer... __________________ ________________________________________ Some times I just feel like smiling.

14-01-2004, 08:19	#2
TaviaRS Dinosaur Join Date: Oct 2002 Location: North of the Watford Gap Posts: 14,931 Thanks: 19 Thanked 42 Times in 38 Posts	Standard wheels 7x17, ET38 What offset you need will depend on the width wheel you want to fit. 7.5 would be either ET32 or ET35 8" would be about ET30 If your friend is running 19s with standard suspension, don't go bigger than 235 tyres as they will rub.

14-01-2004, 09:15	#4
TaviaRS Dinosaur Join Date: Oct 2002 Location: North of the Watford Gap Posts: 14,931 Thanks: 19 Thanked 42 Times in 38 Posts	But Paul, yours almost hit the arches, plus you aren't running standard suspension.

14-01-2004, 09:32	#6
pbanfield78 Briskodian Join Date: Dec 2003 Location: South West Posts: 29 Thanks: 0 Thanked 0 Times in 0 Posts	my friend is running 18's and im sure he wouldnt be running any thing wider than 235 tyres.

14-01-2004, 10:31	#10
SkodiRS BRISKODA Staff Join Date: Oct 2002 Location: darkest Hampshire Posts: 8,650 Thanks: 0 Thanked 17 Times in 13 Posts	Paul, keep the answers coming:thumb:....got some more questions........ standard wheels are 17'' and come with 50 profile tyres...if you upgrade to 18'' and have 40/45 profile tyres isn't the rolling radius the same? I thought the width was limited due rubbing onthe inner archor the mac strut? __________________ Adrian.

14-01-2004, 10:48	#11
redbaron Briskodian Join Date: Jun 2003 Posts: 9,467 Thanks: 13 Thanked 65 Times in 57 Posts	in theory but if you change the offset to et 30 as on my split rims then the 245's clear.. 255s will just go i think... but if you push them out too far they will start to catch on the lips of the arches... assuming the ride height is low enough to do it.. the rolling radius is key for acceleration lower the rolling radius and you drop the gearing... hence im running 215-35-18 at the mo.. which makes it sprint quite well.. but for summer grip i will go wider for max cornering.. you will tear up the wheel arch liners with 245+ but as they need to go to aid brake cooling and intercooler air flow who cares? __________________ ________________________________________ Some times I just feel like smiling.

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