The Thule Tracker II Roof Rack System is the industry''s leading sports and accessory rack - and it''s exclusively available as a factory installation from LEER. With adaptable, functional square tube bars, aerodynamic uprights, security locks and Top Tracks, the Tracker II is the perfect base system for transporting gear from skis to bikes, luggage to construction materials.If you want to get the most from your LEER truck cap, ask to have the LEER factory add a Thule Tracker II Roof Rack System. LEER Factory installations of Thule racks are covered by the LEER Limited Lifetime Warranty.