The Thule Xadapt2 kit connects the Thule 599XTR bike rack and 724/725 ski/snowboard racks to the oval Thule Xsporter truck racks and Rapid Aero bars. Includes all necessary hardware. Easy-to-follow instructions included. Please consult the Thule Fit Guide to match the correct Thule parts with your vehicle. 91021425279 19579900012 XADAPT2