Kage Racing BK4 Four-Bike Rack Carrier for 1-1/4" and 2" Hitch Carries four bicycles Fits 2 inch hitch receiver with attached adaptor or 1.25 inch hitch receiver without the adaptor Rubber bike straps keep your bike from being scratched during transit Fits a 1-1/4 inch or 2 inch Class I, II, III or IV hitch size