SARIS 4086 EDGE 2-BIKEHeavy duty hitch rack that supports E Bikes, MTB bikes or bikes with fenders Zero frame contact, spring loaded arms protect the frame, fork and brake lines by only touching the tires Compatible with wheels sizes from 24` 29` with 3` tires, or 27. 5` x 5` tires Integrated locking cables secure bikes while a locking hitch pin secures the rack itself Rear wheel riser block raises the rear wheel, preventing seat and handlebar interference RV approved