Dear Car Talk: Can you tell me why tire sizes are designated as they are? If I understand correctly, we have metric, English and a ratio. Like, a “235-75R15” tire is 235 millimeters wide, has a ...
The ’82 Jeep Scrambler came standard with a 205/75R15 tire. That works out to 27 inches tall. Optional 235/75R15 tires bumped the overall diameter to just shy of 29 inches. But when Robert Johnson ...