Originally Posted by
CarbonJoe
1.75 rear, 1.65 front.
That is a good
race size (1.75" = 44.45mm rear, 1.65" = 41.91mm), but if you have new tires and want to get as much life as possible, start them around 46.00mm REAR, and 44.00mm FRONT. These are about the maximum diameter you can run under some bodies w/o rubbing, car and bodies differ slightly.