Hi, I'm planning for auto-x this year and am looking for a straight answer on whats the largest tire I can run on stock suspension. Wheels will be either sti bbs 17x7.5, or Kosei K1(possibly) 17x8 . Can I fit a 255/40? or Would I be better off with a 245/40? Its a 03 WRx by the way.
Thanks

youd be ok with a 255/40 especially on a 17 im planning to run 265/35 on 18's i have run the 245/40/17's before with no problem... of course an 03 is a lil different though

Depending on tire choice I'm think 245/40 is my best bet. Thanks

Go for the 17x8 btw with that wide of a tire u might get a little bubble in the top of the tire

Also be ready to roll ur fenders