The G3 Superclamp racks feature a further improved sleeker design with a wider compatibility of bikes. Adjustable arms and wheel trays fit almost any type of bicycle including those with fenders mountain bikes and ebikes. Two shepherd`s hooks hold bike by top of both wheels -- does not touch the frame of the bike. Tilting feature allows access to rear of vehicle even when fully loaded and folds up when not in use. Carries 4 bikes (60 lb/bike in trays closest to vehicle; 35 lb/bike for second two trays). Sleek compact and lightweight design transports two bikes on a single bar. 3 Position arms pivot on case hardened brackets for superior strength. Features the smallest profile of any 4-bike car rack on market. Integrated locking cable secures bikes to the rack. Locking hitch pin secures rack to the car. Bottle opener integrated into tilt handle