I had these on my 95 gt. I had pro kit, koni adjustibles 17x9 and 10.5, . They are 275 front and 315 rear. 275 was too wide in my opinion, and the 315's were awsome but i did need 1/4 in spacer even after i flipped the quad. i found that the tire(F1 gs d3's) it's self was wider than most...