Fulcrum Racing 5 CX Clincher Wheelset These cyclecross wheels are designed for races that don39;t like clean roads mud and dust will no longer be a problem. Also, the all new Racing 5 CX wheels have a deeper rim upper bridge for easier clincher fitting. This wheelset is based on the road version of the Racing 5, but hides the real true quot;invisiblequot; novelty inside the hub a double coating that seals the bearings39; base guarantees smooth performance and long life, even under extreme conditions of use. Straight Aero spokes with a differentiated thickness of 20 at the front and 24 at the rear. Radial front wheel and Fulcrum174; 21 TwotoOne Spoke Ratio rear wheel. Dynamic Balance is also included, and thanks to two enhanced spokes, it keeps the rim39;s gasket material in balance during wheel rotation. Racing 5 CXs are compatible with Campagnolo174;, Shimano Inc. and Sram Co. transmissions Medium profile 24mm rim, with spoke reinforcements and shaped braking surface for a more powerful and adjustable braking 21 spoke ratio Dynamic balance