For 2009 Skylon goes back to basics with the signature X-Rack. This slim, sleek, satin and polished rack is made using aircraft-grade T-6061 billet aluminum. This beauty comes with thick rubber inserts and a bungee which work together to hold those boards in nice and secure. The 360° clamp is easily dialed-in for the perfect fit on any support arm. Once the clamp is attached to the tower your Skylon rack can be easily removed with a twist of the rattle-free single knob. Sizes: S(fits 1-7/8" - 2" tubing), M fits 2-1/4" - 2-3/8" tubing).