Allen Sports Deluxe Hitch Mounted Bike Rack 4-bike rack fits vehicles with a 2-inch trailer hitch only . Vehicle will require professionally installed Class III or IV 2" hitch to use this product 22-inch long carry arms individually secure bicycles with Allen's patented tie-down system Folding carry arms quickly drop out of the way when rack is not in use Rack sets up and installs in less than 5 minutes Sturdy steel construction with black powder coat finish; Lifetime warranty NEVER use on trailers or front of vehicles