Shimano Nexus DH-UR700-3D Dynamo Hub - 6v 3w - for Centre-lock Disc -

Highly efficient, super light weight, premium grade 6 volt 3 watt dynamo front hub with easy to use quick release Provides bright illumination for safer night riding without the need and expense of replacing batteries Important weight savings are made by using an efficient and light weight aluminium coil structure For use with Center Lock disc brakes Labyrinth and contact sealing as used on the premium groupsets - low-friction seals and internal grease sleeve effectively shut out water, mud, and dirt without affecting rotational smoothness increasing service life Borozon treated cup and cone bearing races - super mirror finish bearing races reduce friction providing smooth and precise bearing rotation Push-in wiring harnesses make installation fast and easy Double anodized, premium finish forged aluminium hub shell 100 mm O.L.D. comes with an easy to use quick release skewer Average weight 580 grams