The Upright Roof Rac Tray is a lockable roof mounting system that is versatile and affordable. Your bike's tires sit in the tray while upright frame supports and wheel tie-down straps secure the bike. The rack features a universal mount that fits auto manufacturer's roof racks up to 3.25" wide and 1.75" tall, as well as Thule, Rhino-Rack, and Yakima roof systems. In addition, this rack accommodates many sizes of bike frame. A minimum of 24" of space between the roof rack crossbars is required to mount this rack. Steel Construction. Capacity: 1 bike.