This innovative tire service step fits over any diameter tire up to 13inches wide, raising you up high enough to make washing, waxing, or attaching roof racks a snap. The dependable step adjusts to four positions and features a strong no-slip surface. Rubber bumpers protect your tire from damage. When you are done, the truck service step folds flat for easy storage. The Heavy Duty Steel Frame design has a max weight capacity of 300 pounds.