X5 PRO Tire 31.0/13.5R15 Revs/Mile 650 Mickey ThompsonPro Bracket Radial from Mickey Thompson is a fast, consistent, reliable, affordable radial for the weekend Sportsman racer. Low rolling resistance allowing them to be quicker and faster than the bias ply counterparts. The rollouts are always the same no need to match tires. Details: Centerline Tread Depth 195: 5 Circumference (in): 100. 2 Clean Oil: Yes Compound Designation: X5 Gross Weight (lb): 40. 734 Inflated Overall Diamter (in): 31. 89 Inflated