Skyjacker Tailgate Savers and Spare Tire Supports relocate/support your spare tire and hold the tire in place, preventing it from vibrating at high speeds. The support not only prevents vibration, it will prevent cracking and scratches to your rear bumper and tailgate. Components are adjustable to accommodate 33" to 37" tires and wheel backspacing from 4"-5.5". Installation is simple, no drilling is required, the kits use existing holes from the factory.