Thule Archway XT Bike Carrier 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 bike-to-bike contact and absorb road shock for frame protection Integrated locking cable secures bikes to the rack Patented Fit Dial with Quick-Fit Lever adjusts to your vehicle providing a perfect fit Cinch-Lever allows the bike arms to adjust independently and easily for unique bike frames If you have a bicycle with a non-conventional frame, such as a woman's, child's, or full-suspension bike, you may need a frame adapter to carry your bike on a hanging-style rear mount bike rack. Thule frame adapter: 982XT