"Titan Ramps Tire Holder features a large mount plate and flies nut that allows you to remove the rim and tire quickly and when to tighten, secures your large off-road tire in place. Large thick rubber rings prevent damage to your rim while off-roading and in transit over rough terrain. The heavy-duty steel body is powder-coated to prevent rust and corrosion and can store tires up to 37"" in diameter and 17"" in width."