Originally posted by gtu935
The optimum tire wheel combo for a stock bodied 911 930 is 81/2 or 9 inch wide front wheels with 245 40 17 tires
for the rears 11inch wide tire size 315 35 17
I would suggest the 17 over the 18 for the street but the 18 for the track
I run 9x17 and 11x17 with Victoracers in 255/40 & 315/35. This setup, along with a mild suspension upgrade from SRP made my car a helluva lot easier to drive on the track. Stock HP...
-Garen (87 930)