This is one Thule Pack 'n' Pedal tour Rack. It is designed to work as a front or rear rack. Note: Requires use of Thule Panniers or side frames (sold separately) for stability. Features: Patented rack attachment system works on virtually any bicycle from full suspension mountain bikes to commuters and everything in between (Tire clearance up to 29 x 2.5") Includes rails for mounting panniers Works with any type of frame material on either the seat stays or fork Tough construction allows for variety of rugged riding uses with updated rubberized grips to create a silent and vibration free performance Also features improved tire clearance and light/reflector attachment point Add-on side frames allows virtually any type of pannier to be used on the Tour Rack