I searched this forum and didn't see anything that answers my question. I've got an 09 GT500 with stock gears, 2.6 pulley, CIA, uca/lca...thank you Posi, and C&R H/E...thank you Revan. I want to to purchase drag radials to have mounted on a set of 17x10.5 rims I have that are not being used. My question is am I better off with 275/50r17 with a 28 inch diameter or a 295/45r17 with a 27.2 inch diameter? The 275 has a 9.5 inch tread width and the 295 has a 10.6 inch tread width. The 275 has more sidewall but less tread width. The diameter of the stock 18 inch F1 is 27 inches so both choices will increase my stock tire diameter. I'm hoping some of you on here with experience can give me some advice. The 17inch rim would be for track use only so I can run my F1's for "regular" driving.