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[mightyaa]

I’m looking at autocross tires because it sort of effects my winter setup.

Due to SCCA rules, I have to use stock sized wheels. So I’ve got 19x8.5 on the front, and 19x9.5 on the rear without buying new wheels. I was waffling around getting a 18" setup and using the stock 19" wheels for summer, but I really don’t like the 18" wheel options out there atm and the auto-x tire size options is also pretty bad. So I’m now looking at 20" summer wheels and using the 19" for winter/race.

I’m rather limited to Hoosier A6 if I keep the 19" wheels. I’ve seen multiple other racers squeeze wider tires onto narrow rims, but they’ve always been much smaller wheels with a lot more sidewall to work with. Can a low profile tire be pinched onto a wheel ½" narrower than the recommended size?

The 265/35zr19 is what I’m looking at stuffing under the front end. Recommend rim size for the tire is 9"-10". Stock PS2 size is the 2nd number: Height is 25.6" (25.8"), tread width is 9.6"(NA), tire max width is 10.4"(9.8"), and at the rim it’s 9" wide (8.5").
For the rears I was eyeballing the 295/30zr19 that recommends a 10"-12" wheel. Same issues there, but at least I could step down to a 265 whereas the front only other option is a 235/35r19.

Opinions on whether it will work?

[sayemthree]

if you went with 18's with the BFG r1 in 265 front and 285 rear I think you would have a winnig combo.

[mightyaa]

Originally Posted by sayemthree

if you went with 18's with the BFG r1 in 265 front and 285 rear I think you would have a winnig combo.

Thanks, but it still has the same issue (but at least gives a bit more sidewall with 18"). Can a 265 stretch over a 8.5" wheel?

Also, the R1's are a track tire. Bad choice for autocross since they'll stay cold and never reach their potential. 18" wheels also have another couple weird issues. Autocross compound tire selections are worse than you find in 19" sizes for us. 245's or 285's with nothing in between. 18" wheel selections are also rather lacking for something I'd want to drive on half the year when winter tires get mounted on them.

[BMW MotorSport]

YES the 265 will work fine on a 8.5 rim. I have that combo on my E36 m3.

[Bob@BPS]

Originally Posted by sayemthree

if you went with 18's with the BFG r1 in 265 front and 285 rear I think you would have a winnig combo.

That's a GREAT combo, and an excellent suggestion. I have a set of BFG R1s in those sized on a set of Volk TE37s. I'm about to find out if they will fit over my new Brembo 380 6/4 piston BBK.

Bob

[sayemthree]

the BFG comes up to temp pretty quick. what do you want street tires?

[mightyaa]

Originally Posted by sayemthree

the BFG comes up to temp pretty quick. what do you want street tires?

No, big difference between track and autocross compounds. With autocross, it gets up to temp in less than the 50 second runs (5 minute minimum between runs). A track tire will barely get warm and aren't that much better than a really good street tire... they need a few track laps to generate enough heat and are tough enough to last whereas auto-x tires will get burned up fast at a track..