Tire ChangesFAQs: How do you know when your motorcycle needs new tires? There are several signs that a motorcycle needs new tires: Tread indicators are level with the top of the tread groove Tires are more than six years old Tires are worn unevenly or have sidewall damage Must the front and rear motorcycle tires match? Except for a few specific cases, front and rear tires should be a matched set. Manufacturers design tire sets to work optimally together. Swapping