Car mounted bike rack. Bolts onto tow bar. Fully adjustable to fit most motocross, enduro and trail bikes 50-600cc. This bike rack is made so that when not in use it simply pulls out from the hitch and can be stored away for future use. The hitch plate stays on your vehicle with your tow ball. Please Note: A spacer may be needed for some vehicles with flat backs. We have 2 different spacer sizes: 120 and 170mm. The spacer simply bolts on between the hitch plate.