I’ve purchased my wheels 15x7 front 15x8 rear and will try to run 225/60-15s front & 255/60-15s rear. This is the information that I’ve found. FRONT 14x7 w/ 225/60-14s 15x5 w/ 195/65-15s 15x7 w/ 225/60-15s 16x7 w/ 245/45-16s 3-1/2 or 4 inch backspacing Front 17x7 w/ 245-40/17s 4 inch backspacing. REAR 14x8 w/ 235/60-14s 15x8 w/ 245/60-15s 15x8 w/ 255/60-15s or G-60/15s 15x8 w/ J-60/15s (M&H racemasters) 16x8 w/ 255/50-16 3-1/2 or 4 inch backspacing 18x8 w/ 275/35-18 4 inch backspacing Some of the information was found here, I cannot confirm any fitment. http://www.maverickman.com/TireandWheelSizes.html
I've run 8" inchers on the Rear , and six inchers on the front on several cars now . Steers well , and I have a modicum of traction in the rears. Works for me . Cometized ( Chip )
I run a 255 tire on an 8 inch wheel with a 4 1/4 inch back spacing. I believe a 4 1/2 inch back spacing is also doable. Check out this site's Garage wheel and tire page. Beware of possible tubbed vehicles for anything wider than a 275 tire or an 8 inch wheel: http://mmb.maverick.to/timeslips/wheels