T2 Pro X 4-Bike Add-OnThis add on to the premium Thule T2 Pro X platform hitch rack allows 4 bike capacity (2" 50mm receivers only). Details Secure bikes quickly without frame contact with the frame free ratcheting arm Eliminate bike interference by adjusting side to side to create generous spacing between bike mounts Ideal for carbon frames, mountain, downhill, ebikes and fat bikes as it fits 20 29" wheels and up to 3" tires without adapters Not for use with front fenders