Qu: Autocross & Stretched Tires (10.5"x245)

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Aug 29, 2012, 10:53 PM

#16

RJones

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Quote:

Originally Posted by sujinX

Ur not legal in stu anyways with the 18" wheel. Unless that's a typo. 10.5" is a bit too wide. A friend of mine in stu is running 245 rs3 on 10" wide wheel. It's not stretched too bad, he dominates the Stu class.

An 18" wheel is definitely legal in STU. There's no limit to wheel size, tires are just limited to 245 for AWD.

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Aug 30, 2012, 01:56 AM

#17

sujinX

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Hmm I could have sworn width was unlimited but diameter wasn't. O well everyone competitive runs 17's in stu.
Thanks for clearing.

Last edited by sujinX; Aug 30, 2012 at 02:01 AM.

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Aug 30, 2012, 04:45 AM

#18

RedZero

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Never noticed that, it does say unlimited under width. The Evo X's come with 18's but 8/9 do not so maybe its not legal???

EDIT: Any wheel is allowed, he's right. Thx

Last edited by RedZero; Aug 30, 2012 at 11:32 AM.

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Aug 30, 2012, 07:53 AM

#19

Dallas J

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From the rules.

Quote:

B. Tires may have section widths up to and including the following:
STF, STC, STS, STR (AWD) – 225 mm
STX (AWD), STU (AWD) – 245 mm
STR (2WD) – 255 mm
STX (2WD) – 265 mm
STU (2WD) – 285 mm

Quote:

Any wheels are allowed with widths up to the following:
STF, STC, STS, STR (AWD) – 7.5”
STX (AWD) – 8.0”
STX (2WD), STR (2WD) – 9.0”
STU – unlimited

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Aug 30, 2012, 08:02 AM

#20

Boltz.

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If you're looking at RPF, I'd try the 9" (believe its +'2X') with a 245/40. You'll get better acceleration and less roll over at the expensive of a shorter tire.

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Aug 30, 2012, 08:26 AM

#21

03whitegsr

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Hankook recommends up to a 9.5" wheel on the 245/40/17 R-S3. The wider the wheel the better it seems on the R-S3 tires. I'm running an 8.5" wheel on a 215 (max recommended is 8" wheel) on my E36 BMW and they are awesome for auto-x, minimal sidewall roll with great turn in. The stretch makes me nervous on the street though and I would have rather had the 225 (max 8.5" recommended) but they were out of stock at the time.

I'd probably do the 17x9.5 +38 RPF1 wheels and then use a spacer to clear the front caliper and pick up some front track width while doing it.