Road racer

I am running in the SSM class (supercharged) and want to run some Hoosier A6's or A7's. I see in the autocross thread that many of the top runners use this tire but what it doesn't show are the wheel dimensions. I have 17x9 +63 square (Nurburgring's) and do not want to go with a wide body kit. I need all the rubber I can squeeze in the wheel wheels. Will the 275's fit or am I stuck with 255's? Please help! Thanks!

03threefiftyz

SSM = 315's.

DTP525

For a 17x9 wheel, I wouldn't go wider than a 245 Hoosier. You'll want at least a 17x10 if you want to do 275 Hoosier. They all run wide for their respective sizes.

jaundice

All the stock guys run 275s on CR or AP2 wheels....

djsilverjohnson

I put 245/45/17 A6's on WedSport 17x9's and the tire is narrower than the rim. I have 275/35/17's on them now and the tires barely bulge past the rims.

For the 275/35/17 and 275/40/17 A6's, Hoosier shows 9-11" rims acceptable, with the listed measurements taken on a 9.5" rim. That said, I've read that the CSP crowd likes running the 275/35/15's stretched. I'd suggest trying them on your 17x9's before investing in another set.

https://www.hoosiertire.com/rrtire.htm

Road racer

This is great info. I really appreciate the tips. Does the short height of the 35 tire cause any issues? After comparing the heights to tires that I have on the car now (Nitto NT01, 255/40/17), I was thinking the 275/40/17 Hoosiers would be my best choice from a height perspective but your comments on using the 35 height has me wondering. Thoughts on this?

Rodney

+ eleventybillion. run them on your current wheels first. although not optimal, you will get most of the performance out of them, and you can see then if you are going to 295/315 width, which would necessitate much larger wheels.

Road racer

If I were to get a set of 10" wide wheels, would 295/35/17 Hoosier A6's have clearance issues? If not, what wheel offset do I need to look for? I have no issues with rolling the fenders and relocating the rear bumper tab. Just don't want to cut up the fenders for wide body.

This info will help me make a tire decision.

Thanks!

djsilverjohnson

I ran the 275/35/17's on a Nissan 240sx. They were the same diameter as the OEM tires and gave me a better 2nd gear than the taller 40 series. The shorter sidewall also makes for more precise turn-in. The autocross crowd likes the 35 series. 275/35/15, 275/35/17, 295/35/17, 285/30/18 are popular.