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Tugboat 08-24-2009 01:22 AM

Autox slicks for the stock 15s?
Has anybody ran autox tires on teh factory 15" spilt spoke wheels? I have an extra set that I want to get some decent tires for autox. I didnt know how big you could go on those since idk how wide they are, maybe 205s? They come with 195s factory.

Id love to get 225s on them but i doubt their wide enough.

Any imput?

focusedaddiction 08-24-2009 10:08 AM

205/50/15's will be your best bet for stock wheels, i've used that size alot & it works out well. 225's are too big for stockers, you would need a 7 or 7 1/2" rim for that, like rota slipstreams[race]

jayel579 08-24-2009 10:18 AM

You can use a 225-50R15, it will fit on a 6.5" wide rim. You aren't asking too much of the tire to do that, recomended rim width for that size tire is a 6-8" wide rim. You might be able to get away with a wider tire for that rim size it will just come down to clearence and availability. A 225-50R15 has some good choices for AutoX tires.

Tugboat 08-24-2009 02:06 PM

Hmm alright ill have to start looking for some 225s now I guess.

WD40 08-24-2009 02:21 PM

You can use a 225-50R15, it will fit on a 6.5" wide rim
The 15" fOCUS wheels are 6" though, not 6.5".

That's really pinching a 225 on a 6" rim, and more often than not will result in reduced performance.
The contact patch may end up convex instead of flat due to the sidewalls being pulled in so much.

I'd take focusedaddiction's suggestion and find yourself some 205/50s.
Or, maybe a 215/XX, though I'm not sure if there's many to choose from in a 15" size.

xShiFTx 08-24-2009 02:59 PM

I run 205/50-15's on the split spokes. The guy putting these tires on (Kumho XS') said it was a giant pain and he would not go any bigger for fear of pinching on stock rims.

Tugboat 08-24-2009 05:43 PM

Ok, so it sounds like I need 205s, or wider wheels, haha.

Thanks for the help guys!

WD40 08-25-2009 11:33 AM

Since you've got the extra set of 15X6s lying around, that's a no brainer.
That's also a pretty light wheel.
By the time you buy some 7-7.5" wheels (to fit 225s), that are also as light as your existing wheels, you'll be spending quite a bit of money.

Just get 4-205/50s and hit the track!

Auto-X-ZTS 08-25-2009 12:36 PM

Lorin Mueller ran 205/50-15 and 225/50-15 on 15" wagon wheels when he had his HS car; was no faster on the, yes a 205/50-15 is a good size for that wheel.

Tugboat 08-26-2009 07:01 PM

Haha yeah I dont have money for an extra set of wheels. Ill def look into some kumho ecsta xs or something, Iv got some hard competiton next year and need to be prepared.

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