I need some new rear tires on my iroc and i want them as big as i can possibly fit. I have the stock 16's. I want them beefed up to the max because I'll be going to the track alot very soon, since i get my lisence in july.

What's the max size i can get?

(its also a daily driver, but i'm more worried about the track)

 

i have seen 265/40r16's on gta wheels and they are the same size as the 16x8 iroc rims. i also think that a 245/40r16 tire works really well on 16x8" rim