Stagea Offset

[Run-It-Hard]

Ok, so what I see from your pointless reply is that you want to be spoon fed. Good luck to you...

Edited March 29, 2011 by RoadsterGarage

[Sunkist]

[iamhe77]

What happens if I run 18 x 8? Should I be going 235/45/18 instead?

For M35's... (speedo values are based off the OEM speedo calibration for MY NM35)

STOCK RS

17" rims = 55 sidewall (total tyre height is 668mm) - speedo reads 10% fast

18" rims = 45 sidewall (total tyre height is 677mm) - speedo reads 8.7% fast

19" rims = 40 sidewall (total tyre height is 679mm) - speedo reads 8.3% fast

20" rims = 35 sidewall (total tyre height is 680mm) - speedo reads 8.2% fast

The ~10mm extra total height over the stock RS 17's fills out the wheel arch perfectly (particularly if you have lowered your suspension 20-25mm)

[Sunkist]

For M35's... (speedo values are based off the OEM speedo calibration for MY NM35)

STOCK RS

17" rims = 55 sidewall (total tyre height is 668mm) - speedo reads 10% fast

18" rims = 45 sidewall (total tyre height is 677mm) - speedo reads 8.7% fast

19" rims = 40 sidewall (total tyre height is 679mm) - speedo reads 8.3% fast

20" rims = 35 sidewall (total tyre height is 680mm) - speedo reads 8.2% fast

The ~10mm extra total height over the stock RS 17's fills out the wheel arch perfectly (particularly if you have lowered your suspension 20-25mm)

oh on this i think for the arx its +5 on the sidewall for each..

mine are 19" with a 45' sidewall.

and against the informeter with a GPS HUD dispaly it was i think 3-4km out at 100km/h

[iamhe77]

oh on this i think for the arx its +5 on the sidewall for each..

mine are 19" with a 45' sidewall.

and against the informeter with a GPS HUD dispaly it was i think 3-4km out at 100km/h

Would probably work out the same for RS and RX's

[Jetwreck]

Would probably work out the same for RS and RX's

nup....standard size for the AR-X is 225/55 18"

[Sunkist]

but your running a 19 and a 45 sidewall

[Jetwreck]

but your running a 19 and a 45 sidewall

.....but I am running a 245 as well!....more width....higher wall!

I may even go to a 35 sidewall if the new diff's throw out my speedo!....more go!

Edited May 23, 2011 by Jetwreck

[iamhe77]

nup....standard size for the AR-X is 225/55 18"

Yes, I know... I was referring to the speedo accuracy.

Mine reads 10% high according to GPS, as have most other RS's I have been in, so adding the extra diameter will get the speedo reading close to what Aaron stated.

[Jetwreck]

Yes, I know... I was referring to the speedo accuracy.

Mine reads 10% high according to GPS, as have most other RS's I have been in, so adding the extra diameter will get the speedo reading close to what Aaron stated.

oh....yeh the speedo is good in the AR-X until about 95km/h's....after that it out.....what's confusing is that the Infometer was spot on to my GPS.

[Sunkist]

Yes, I know... I was referring to the speedo accuracy.

Mine reads 10% high according to GPS, as have most other RS's I have been in, so adding the extra diameter will get the speedo reading close to what Aaron stated.

well yeh, if it makes any difference mine is a 235/45... which was lucky coz no chance am i getting a 245/45 under my guards at my height.

but yeh, comparing with scotts even, im kind of glad that my speedo is only 3-4k's out..

[iamhe77]

well yeh, if it makes any difference mine is a 235/45... which was lucky coz no chance am i getting a 245/45 under my guards at my height.

but yeh, comparing with scotts even, im kind of glad that my speedo is only 3-4k's out..

Rolling diameter, not tyre width

235 or 245 shouldn't make a difference to your speedo.

[Sunkist]

thats what i would've thought

[horrace]

If they are both the same profile but different widths the profile will be different, the profile number is a percentage of the width. So a 225-45 will have a smaller sidewall than a 245-45.

[whitenight27]

ok i have a s1 rs4 and i am looking at some rims they are 18x8.5 and 18x9.5 running 235 and 265 rubber.

will they fit with no modding and what about the rolling diameter?

[GTR260]

You'll prob find that 265's will rub, i have 245's all round on 18x9.5 +20 and the stick just outside the guards by a couple of mm, and have bout 10mm to the strut

[whitenight27]

ok so if i change the 265 for something smaller will that be ok. and i just read about roling diameter being different from front to rear am i going to have a prob with this? and i just found out the rears are 18x9.5 + 38 offset running 265/35/18 and the fronts are 18x8.5 + 34 offset running 235/40/18. is this going to cause probs?

[pipster11]

235 or 245 are pretty cheap

Run the same tyres all round and the atessa will be happy

[whitenight27]

ok will the 235s fit the rear 9.5 ok?

as i can just swap my tyres off my rims i have now as they have 95% left

or get some 245 or 255 and will the 255 fit under the front

Edited August 11, 2012 by whitenight27

[pipster11]

Just read the offsets and they are prob gonna sit inside the guards too much and foul on stuff up front

On my phone atm so I'm sure someone will explain more shortly