Sleek, aerodynamic ski or snowboard carrier with vertical spring system and different height feet for all types of skis or snowboards. Low profile for improved aerodynamics. Smart vertical spring system adjusts to accommodate all thicknesses of skis and reduces the carrier height when unloaded. Two sets of height extension T-track feet included to raise carrier and protect vehicle roofs from skis/boards with tall bindings. Soft rubber arms protect skis during transport. Large push button is easy to open with gloves on and it opens by pushing in an upward motion. Corrosion-resistant aluminum arms are very durable. Thuleís One-key lock cylinders lock the skis/boards to the carrier and the carrier to the vehicle (locks included). Fits Thule rack systems, round bars and most factory racks with both T-Track and SpeedLink around the bar mounting options. Fits up to 4 pair of skisor 2 snowboards (Snowpack 4), or 6 pair of skis or 4 snowboards (Snowpack 6).