I think the two might be the same but not totally positive...I have a set of SSR GT1's that I got for my 3 series.... and I never got to put them on. They are awesome wheels, problem is they're only 18x8... yea 18 is what i want but im not thrilled bout the 8.... i think this car probably already has a little bit of trouble with wheel spin with the traction etc off for 1/4mile and auto-x-ing.... i think stock the biggest tires are only 8.5.... I really intend to do quite a bit of work to this car.... starting with port and polish (I'm doing more than blot on this time for sure!) and I'm afraid that I'm going to need to slap on some much wider tires, like my buddy his M3 has either 9.5 or 10 in the rear.... WOOO! Anyhow I was wondering A) How big can we go with our rear tires? How wide do you think I should go with some moderately serious N/A and later stage turbo. Don't worry I also intend on addint suspension (Might even upgrade the brembos) etc etc. I want to kill corvettes... With a passion.

~Josh

 

I've seen people with 10's on there. It starts to get really tight though. I havn't seen anyone do it, but some are talking about 10.5's on the rear. I'm sure its doable, just have to do it right and make sure you have all the offset/clearance issues ironed out etc.