Thule 7324 SnowPack 4 Fits 4 Pairs of Skis or 2 Snowboards ModelNumber=K7278 Spacer kit for using GXP Spacer kit for using GXP cranks with the Problem Solvers BB30 PF30 Adaptor (CR0096) or the E46 PressFit 30 Bottom Bracket (CR0098) The Wolf Tooth Morse Cage has its name because of the dots and dashes on the mounting plate that provide for up to 32mm of vertical placement adjustment Two sets of height extension T track feet included to raise carrier and protect vehicle roofs for skis boards with tall bindings Smart vertical spring system adjusts to accommodate all thicknesses of skis and reduces the carrier height when unloaded