Hitch-mount Bicycle Carrier, holds TWO bikes with horizontal crossbars, fold-down style. For Frame Adapter for women's bikes order 12407941. Hitch-Mount Bicycle Carrier holds bikes securely off the back of your vehicle by mounting into a Hitch Receiver. The Carrier installs and removes in seconds, and also folds down to allow entry into the rear hatch. The Carrier holds any bike with a horizontal crossbar (men's style). Bikes without horizontal crossbars (women's style) require a Frame Adapter (sold separately-12407941). Carriers are available to hold two or four bikes. Please choose 1-1/4 hitch receiver (holds 2 bikes) or 2 which holds 4 bikes (this one additional $35)