Thule T2 Pro 2-Bike Add-On - The T2 Pro 2-Bike Add-On by Thule lets you add on to their premium platform hitch rack allowing you to carry up to four bikes when combined with the T2 Pro (sold separately). Compatible with 2 inch receivers only: it delivers maximum strength: security and user friendliness. A frame free ratcheting arm secures your bikes quickly without frame contact: and there is generous spacing between the bike mounts with the ability to adjust side to side to eliminate bike interference. It fits 20-29 inch wheels and up to 5 inch tires without adapters making it ideal for carbon frames: mountain: downhill: or fat bides: while an integrated cable lock locks bikes to the rack. The Thule T2 Pro 2-Bike Add-On will let you add a couple more friends to your next riding adventure.