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. Universal wheel trays with robust metal insert accommodate a wide variety of bikes and wheel sizes (up to 4� tires). Tilting feature allows access to rear of vehicle even when fully loaded and folds up when not in use. Two shepherd`s hooks hold bike by top of both wheels -- does not touch the frame of the bike. Sleek compact and lightweight design transports two bikes on a single bar. 3 Position arms pivot on case hardened brackets for superior strength. Integrated locking cable secures bikes to the rack. Locking hitch pin secures rack to the car. Bottle opener integrated into tilt handle