Just finished some mods to my car, added a 4C and Aluminum DS. Car has a 373 gear and VMP tune. I've been running a 275 50 15 which is short 26.1" to get some wheel speed prior to converter. Went 12.05 @ 115.37 with that set up. Went out with new mods listed above and ran a 11.71 with a 1.65 60' at 115.87. After reading some threads here on the ultimate gear ratio I decided to go back to a 275 60 15 to lower my ratio a bit. Should be around 3.55 with taller tire. Summit is on BO for 275 60 15s till late June! Was thinking of going to the 295 55 15 which is only .02 shorter and 1" wider. Any feed back on those who use this tire? I've got 15x10 rims with 7" BS. Should fit? Is it more tire than you need to carry? They are 2# heavier in each tire.