SV-9-FB DYNAMO HUB - SILVER - 28H - 7.9X74MM QR AXLE (BROMPTON)
The fantastic SP Dynamo 9 series dynamo hubs unique aerodynamic shape, low resistance and super light weight, make for and increadably efficient hub. The unique aerodynamic shape of the hub has been optimized to a golf ball size, while attaining an unprecedented weight only 299g.
Although the 9 series hubs are marked with 1.5W, the real output is much higher. The output perfectly matches German StVZO 6V3W/20” regulation.
Output Notes from Shutter Precision
The SP-9 Series real output is 6V 3W for 20”, however for 26”/700C its output is very close to 6V3W but still a little bit less at low speed & therefore, it cannot pass German StVZO regulation. For the German market SP must get StVZO approval so the 9 series was used to apply the new regulation i.e. 6V 1.5W LED. And 9 series got 6V 1.5W LED StVZO approval.