The HoldUp is Yakimas fastest easiest way to load bikes. Its beefed-up arm pivot makes it stronger than ever and the side-to-side adjustability reduces the chance for bike-to-bike interference. Its a road trip companion for life. Side-to-side adjustability that reduces bike to bike interference. StrongArm design fits wheels from 20-29″. Zero contact with the bike frame. Tilts down with bikes loaded for rear of vehicle access. Compact design allows the bike trays to fold up when not in use. Comes with fully integrated security; Locks bike to rack and rack to vehicle SKS LOCK CORES included. Carries 2 bikes out of the box or 4 bikes with optional HoldUp +2 AR7288.