The Thule Hitch Ski Carrier converts most Thule trailer hitch bike racks into a ski rack that fits up to six pairs of skis or four snowboards. It converts Trailblazer, Hitching Post, Expressway, Rak-N-Loc, and Spare Me bike racks. Thule makes loading the Hitch Ski Carrier easy by included a rubber strap that holds the skis while you tighten the locking arm. Thule redesigned the Hitch Ski Carrier to accommodate fatter skis. The Hitch Ski Carrier locks with the same cylinders as your bike carrier, so you can just swap them when you convert the rack. Bottom Line: Don't put your Thule bike rack away when the snow starts flying, use it to cart your skis around with the Hitch Ski Carrier.