Ultra-Light Aluminum is nearly half the weight of most hitch racks, for easy handling, installation and removal * Patented Hold Fast Cradles with RDT (Road Dampening Technology) secure the bike to the rack while absorbing road shock * No-Sway Cages with RDT prevent contact and absorb road shock for frame protection * Integrated Locking Cable and AutoAttach Lock Knob lock the bike to carrier and carrier to vehicle * Sleek Aero-Design improves ground-clearance and increases distance between bikes for maximum protection