The lightweight Shimano Alfine 6 Volt 1.5w Dynamo Centre-Lock 32 Hole Front Hub provides bright illumination for safer night riding without the need and expense of replacing batteries. Shimano have made important weight savings by using an efficient and light weight aluminium coil structure. Using labyrinth and contact sealing which are low-friction seals and internal grease sleeve effectively shut out water, mud, and dirt without affecting rotational smoothness increasing service life. The Alfine Dynamo hub is disc brake compatible using centre-lock rotors and comes with quick and easy quick release skewers.