This accessory works with the Thule Pack n??? Pedal Tour rack to extend the foot clearance with panniers. . . . Easily attaches to Thule Pack n??? Pedal Tour Rack rails in order to slide Thule Pack ???n Pedal panniers further back on the bike.. . Creates more clearance for pedaling action if needed. . Can be used on front or rear mounted Thule Pack n??? Pedal Tour Rack. . 91021330023 27816500013 100044