This specific kit is designed for 180 EXP and 240 EXP rear hubs and includes all the necessary components for a seamless upgrade. Experience the renowned DT Swiss Ratchet System with its incredibly fast 54-tooth engagement. This means quicker acceleration and a more direct connection to your bike, allowing you to power through technical sections and climbs with confidence. The increased points of engagement translate to a more efficient power transfer, minimizing wasted energy and maximizing your performance.