Thule Xsporter Pro Shift - A sliding truck rack easily moves into any position to accommodate different size loads up to 600lbs and works with select tonneau covers. Features • Sliding racks adjust to the length of the bed to carry different loads and can easily be removed • Ideal rack height (18”) allows for easy truck bed access and sits below cab of truck for improved aerodynamics • Accommodates a variety of Thule accessories • Easily mount the Thule Xsporter Pro Shift/Mid Accessory Side Bar for additional gear hauling capacity (sold separately) • WindDiffuser technology disturbs airflow to reduce noise and drag for improved fuel economy • Secure different size loads with adjustable aluminum load stops • Thule TracRac Base Rails (sold separately) provide drill free installation and attach to the truck stake pockets • No cutting or drilling and only limited assembly • Theft resistant system locks rack to base rail (locking knobs included) • Durable, corrosion resistant aluminum construction Specifications • Maximum load: *Holds up to 600 lbs/273 kg when racks are properly installed and weight is distributed evenly. Vehicle limits may vary. Please check vehicle owners manual.