I have been researching this for days and I cannot find the answer. I know the tire size subject has been beaten to death. I just got an 03 vert. it is pretty much stock. I just order h&r race springs, mm cc plates and low profile IRS bolts. I found some 18x10.5 wheels that I really like that have 22 offset. The afs 18x10.5 are a 27 offset so my wheels will come out to the well a little bit more. I wanted to know if 315/30/18 will fit. I see a lot of people talking about hitting the IRS bolts and the either get the low profile bolts or put on a spacer but they don't talk about clearance on the other side. What I want to know is will I need to roll my fenders with 315 with h&r race springs with stock iso in on 10.5 wheels?