SP dynamo hubs are not only the lightest, but also the most efficient at converting cyclists' efforts into electrical energy. The lightest model we have weighs in at an unprecedented 360g while attaining an unmatched efficiency of 72%. These dynamo hubs are premium products designed and engineered for the most demanding cycle tourists, commuters and enthusiasts!An advanced dynamo devise with more efficient and effective output, is built inside the hub. The output from this dynamo hub is much more stable and offers sufficient power to the lights.Totally different from current dynamo hubs. Avant-grade concepts are involved into our design elements. This dynamo hub is not only functional, but also upgraded to contemprary texture. Specification 6v 3w disc dynamo hub For 26" and larger wheel sizes Axle QR type OLD 100m
