Quick-change carrier keeps your spare tire out of storage area. Rust-resistant black powder-coated steel. Installs easily with hand tools to 4" through 4-1/2" square bumper. Fold-down carriers—with easy-reach release—allow trouble-free access to rear compartment. Stationary carriers are similar, but don't swing down. Note: For RVs without rear storage. Choose size corresponding to your spare.