Tire advice for 17x8's

[GThomas]

Hey guys!

Hoping to be back on track soon, new car is fresh out of paint! I did the arc-8 group buy and i'm looking for some tire/fitment advice as i've only run 15x8's in the past.

The arc-8 is 17x8 et25.

I'd like to get tire in the 200 treadwear range as I'll be doing some autocross events to shakedown the new car and then some HPDE's so I don't want to run slicks just yet.

Most people run 235/40, my fenders are rolled, -3.5 camber front -2.5 rear. The 245's are considerably cheaper.

Should I stick with 235/40's ?
DirezzaIII at 207 per tire
Toyo R1R at 191 per tire
Toyo R888R at 210

Can I fit 245/40 (turn in worse?)
RE71R at 169 per tire
Hankook RS4 at 169 per tire
r1r at 186 per tire

Any advice is greatly appreciated.

[Digitalwave]

I'd probably do the 235's. 245/40 is pretty wide for an 8", and that size also pretty tall for an E30.

[Jb325is]

Yep, 245's will hit on the corners of the inner fenderwells and at the pinch weld at the top of the inner fenderwells under compression. I was running Conti ST slicks, which are roughly equivalent to most 245/40's, maybe a hair shorter. My pinch weld is ground flush and tacked, but it was still rubbing pretty badly at Road Atlanta in T1. No issues with 235/40, still pretty tight though


I had to do this:

[GThomas]

Great to know, I didn’t want to run into all sorts of rubbing issues. Any advice on which 235 has the most consistent feel and grip? I can deal with lower life. I’d rather have a consistent feel so I can get a better feel for all the new adjustments on this car.

[FredK]

I run 245/40R17 RE-71Rs on 17x9s with a taller ride height front and rear compared to Jb325is, and I don't rub the pinch weld in the front. I do scrape the plastics and had to cut the upper plastic wheel well liner and roll the front and rear fenders.

I think a 235 NT-01 is going to be the most consistent tire especially on the track. They won't fall off as quickly as the RE-71Rs and you won't have to stress about rubbing.