The Thule Xadapt1 kit connects the Thule 594 Side Arm bike rack, 589 Velo Vise bike rack, and 590 V2 bike racks to the oval Thule Xsporter truck racks and Rapid Aero bars. Includes all necessary hardware. Easy to-follow instructions included. Thule base rack components sold separately. Please consult the Thule Rack Finder to match the correct Thule parts with your vehicle