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Old 09-30-2009, 07:42 PM   #1
EJ25RY
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Default Autocross Wheel setup

I have a 2006 STi and am wondering what size wheel would be the most beneficial on the track. I am looking into purchasing a 2nd set and want to make the most effective choice for good track times. Should I keep the dimensions spec? Can I go a little wider/larger? Any alterations of the fenders? All input helps. Thanks
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Old 09-30-2009, 07:57 PM   #2
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When you say track do you mean autocross or HPDE?

What class are you in?

And by beneficial do you mean "for learning" or "for setting the best lap times"?
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Old 09-30-2009, 08:25 PM   #3
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When I say track I mean autocross.

I'm in class BSP

For setting the best lap times. (I have about a year autocross exp.) So I'm relatively new but am familiar w/ it.
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Old 09-30-2009, 08:29 PM   #4
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I run light wheels like a nice set of Ray's (Volks) or similar, and RE11's or Star Specs. Both are awesome tires.
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Old 09-30-2009, 08:34 PM   #5
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Awesome.. I'm just trying to narrow down what dimensions would be the most ideal for the type of driving I'm doing. ex: 17X8.
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Old 09-30-2009, 08:47 PM   #6
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Quote:
Originally Posted by EJ25RY View Post
Awesome.. I'm just trying to narrow down what dimensions would be the most ideal for the type of driving I'm doing. ex: 17X8.
So if you're in BSP, you're able to run slicks. Your idea of most beneficial is the fastest lap time. Buy an extra set of STi BBS and buy some Kumho V710's and call it a day. Now, for a cheaper alternative, you could run STU (depending on mods), and the best bang for the buck set up is a set of 17x9 +45 Kosei K1 TS and 245/40-17 Dunlop Direzza Star Specs. At your level of experience, you won't really see much benefit to buying the more expensive Bridgestones or a baller set of wheels. The Kosei's weigh 16 pounds, and can be had for around $200 bucks a wheel.
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Old 09-30-2009, 09:01 PM   #7
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Yeah, how deep into BSP are you?
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Old 09-30-2009, 09:05 PM   #8
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most BSP STi's are on at least 17 x9's some on 17x10's tire size is at least 275.40.17 ...some run 295.40.17

Some are on 18x9 or 18x10 with at least a 285.35.18...

Depending on how competitive you want to be....expect to spend about $2000 for a set of rims and tires...hoosier a6 are the choice of top folks....with the Kumho giving up a few 1/10s....but last a bit longer...I would reccomend...to start with trying to find a used set...to learn on...expect about $1000 for a decent set of used ones...

I personally ran 5zigen FNO1C 17x9 43 offset..with 275.40.17 Kumho V710's....just tires ran me about $1300...for the set..

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Old 09-30-2009, 09:11 PM   #9
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Well I have a source that some of the locals in my area go through for very affordable Hoosier A6s that are slightly used (wayyy more affordable than any competition street tire). Just trying to find decent wheels. Thank you all for your input.. Sounds like there will be some fender rolling involved? keep the info coming
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Old 09-30-2009, 09:42 PM   #10
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on a 05+ STi's theres no fender rolling involved....thats why you have the extenda flare on there already...your not going to tuck these...they are going to stick out...so you will need some stiff rear springs so the tire doesn't crush the tirewell...the front end will be pulled out if your run wider than a 275...Here's a couple of pics to help you reference..









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Old 09-30-2009, 09:46 PM   #11
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Quote:
Originally Posted by EJ25RY View Post
Well I have a source that some of the locals in my area go through for very affordable Hoosier A6s that are slightly used (wayyy more affordable than any competition street tire). Just trying to find decent wheels. Thank you all for your input.. Sounds like there will be some fender rolling involved? keep the info coming
All my wheel/tire experience lies in Street Touring. I could have clearer, perhaps? For MY set up, I required a lot of work. I am completely unsure about the steps involved with wide slicks though.
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Old 09-30-2009, 09:53 PM   #12
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more pics







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Old 09-30-2009, 09:57 PM   #13
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Old 09-30-2009, 10:15 PM   #14
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The short answer: the widest, stickiest tires possible on the widest, lightest wheels possible. Rota DPTs are reasonably cheap and fairly light. FN01RCs are good. RPF1s are good. Volk has some great and expensive options. There are plenty of other options. Hoosier A6s or V710s (as noted before)

The long answer(s): You may want to consider running STU. If your springs are stock, you may rub. If you aren't super competitive, you may want to get something more practical and or cheaper. Keep an eye out for end of season deals.

Good luck.
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Old 10-01-2009, 01:26 PM   #15
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The set up that i am going with is a 17x9 Rota DPT with some 255/40R17 Star Specs. I was told that the 255's are over kill and i should prob run some 245/45R17s instead or some 235's to stretch the tire a bit. Any input on stretching the tire?
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Old 10-01-2009, 01:41 PM   #16
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The set up that i am going with is a 17x9 Rota DPT with some 255/40R17 Star Specs. I was told that the 255's are over kill and i should prob run some 245/45R17s instead or some 235's to stretch the tire a bit. Any input on stretching the tire?

go play in STU for another season and find all the AutoX school events that u can next season.

run the 255 width. i would actually skip the star spec and try the re11r or Kumho XS. teh star spec has seen better results on cars weighing 2500-2800 lbs. i've seen 3 cars locally begin to chunk the star specs in less than a season that are heavier than the ST/STS cars.
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Old 10-01-2009, 01:48 PM   #17
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Ok so understanding what your saying. Run the 255 but go with the RE11. Those were my second choice in tires the RE0-1Rs were superb tires. I don't live in the U.S where I autocross they only use R-comps or street tires. That's what makes up the classes. Your allowed an unlimited amount of modifications with no penalties. Thanks for the advice
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Old 10-01-2009, 08:09 PM   #18
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Quote:
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go play in STU for another season and find all the AutoX school events that u can next season.

run the 255 width. i would actually skip the star spec and try the re11r or Kumho XS. teh star spec has seen better results on cars weighing 2500-2800 lbs. i've seen 3 cars locally begin to chunk the star specs in less than a season that are heavier than the ST/STS cars.
Depending how strict his region is, he can't legally run 255's without someone complaining. In this or last months SportsCar they did a Street Touring tire test. Don't remember all the results of hand, but they LOVED the new Hankook RS-3's and the Star Specs had the fastest times, IIRC. Kumho street tires have never really been top of the class, as I believe is the case with the new XS. But I know people who swear by the new RE-11's, and I am HUGE fan of the Star Specs. It seems like the performance bargain.
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Old 10-02-2009, 05:25 PM   #19
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We ran stock BBS 17x7.5 / 245 -40-17 hoosiers ,we used up 2 sets in a season of local events ,IMO this is not enough tire for the power and weight of an sti ,A light set of 18 x9.5 w/285 's ,and good coilovers [stiff springs ,dampening ]and a bit of fender pulling - rolling should set you ''Free ,''expect to spend 2 k or more on wheels - tires , I don't know if you have coilovers or not ,but with the added traction comes many other issues to deal with ......it can be a very ''Large Can of Mean ,Nasty ,Money Hungry Worms ,.We run 18x10.5 / 315 -30-18 hoosiers with lots of suspension an many hours of R&D ,cut fenders ,body work etc.SM ,Track & Hillclimbs .Good Luck ,the end result is well worth it .
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Old 10-11-2009, 12:08 AM   #20
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As everyone has said for BSP 275s and 17x10s is one of the better combos.

suspension setup and wheel budget will dictate exact sizing.

Little Article on my 17x10 equipped BSP STi
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Old 10-16-2009, 03:01 AM   #21
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i would actually skip the star spec and try the re11r or Kumho XS. teh star spec has seen better results on cars weighing 2500-2800 lbs.
I would disagree very strongly with that statement!
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Old 10-16-2009, 01:11 PM   #22
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Quote:
Originally Posted by Boxologist View Post
go play in STU for another season and find all the AutoX school events that u can next season.

run the 255 width. i would actually skip the star spec and try the re11r or Kumho XS. teh star spec has seen better results on cars weighing 2500-2800 lbs. i've seen 3 cars locally begin to chunk the star specs in less than a season that are heavier than the ST/STS cars.
The chunking Z1*s that I have seen come from heavy sidewall wear due to camber limitations or improper pressures. I've personally been through 4-5 sets of autocross only dunlops on various cars ranging from 3000lbs-3500lbs without any issue. Go figure, the cheap old tire is still fast

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