240 - The number you can rely on: the 240 with Ratchet EXP and Ratchet DEG. The 240 is designed for bikers with the highest demands. You are spoiled for choice: opt for the 240 with the weight advantage of the Ratchet EXP® system or for the small engagement angle of the patent-pending Ratchet DEG®. The EXP system requires fewer parts and is available with 36 and 54 teeth. The Ratchet DEG offers you 90 teeth, but also guarantees the well-known reliability thanks to its larger design.