[saxmo]

when checking for the widest tire that'll fit, I saw something real kewl on HorsepowerTV. They tied a weight (bolt or nut,etc.) to a string, and taped the string to the fender... the weight makes the string hang straight down, and you can measure from the string directly to the inner part of the fenderwell (measure to any bumps in the metal that'll be closest to outside ridge of fender). That'll give you a close idea of widest rubber that'll physically fit inside the fender. They ordered the rubber, then used a backspacing tool mounted to the rubber tire to find out what backspacing they would need on the rim. I believe the tool was called a mount mate, but not sure.