OTC Heavy Duty Truck Wheel Step Tire-mounted wheel step provides quick, easy access to under-hood components. It fits heavy-duty vehicles (Class 7/8). 300 pound capacity and installs in seconds. Its adjusts to fit 22-1/ 2 inch to 24 inch wheel sizes. Its a non-skid platform surface. It comes with Lifetime Marathon Warranty. Value is at the core of the OTC tool and equipment portfolio. Whether it's a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.