The XP can accomodate a variety of bikes up to 2" in diameter and with different angled frames. Carrier folds down for access to rear cargo area for your convenience. The cradles are cushioned and screw down tightly to secure bikes to carrier. Quick-release locking knob provides extra security against theft. Folding XP - Extreme Performance 3-Bike Carrier for 1-1/4" & 2" Trailer Hitch Receivers. This carrier's steel construction provides lasting toughness and cushioned cradles on the arm rotate to keep wheels level to the ground, providing improved ground clearance. Additionally, the cradles help provide a scratch-free ride for bikes by using thick kraton vinyl cushioning with large grooves, which prevent bike cables from rubbing on the frame. They also work to prevent bikes from rocking back and forth during transit. The cradles accommodate bikes with up to a 2" diameter frame, and the locking knob allows for a secure and quick unload. The rack also tilts forward to allow easy access to the vehicle's rear cargo area.