The Campagnolo Ekar 13 speed sprocket pack offers a complete range to overcome any 2x system. The 9-tooth gear wheel allows a complete range with zero loss of efficiency. The compact sprocket pack features a narrow design with quick changeovers, lightness and increased chain safety. Made of durable materials and durable design, no weight penalty. A smaller spacing of the low gears creates a natural progression of cadence. Increasing the distance between gears creates maximum speed options. The 2-piece block combines the strength of steel with the lightness of alloy. Compatible with the body of the control unit Campagnolo N3W for great versatility and total compatibility.