MHS, Modular Hitch System: a future-proof modular system Carries up to 4 bikes depending on your prefered configuration Full Tilt: tilting feature allows easy hatch access without removing the bike. Complete Integrated Security: locks the rack to the car and the bikes to the rack. Transports bikes up to 80 lb. in the first two trays closest to the vehicle Designed to be used with 2" hitch receivers only