Product Description The Alfine dynamo hub DH-S501 by Shimano - Road light for city traffic The Shimano Alfine dynamo hub DH-S501 provides your City bike with energy for road light. It is intended for use on Center Lock disc brake wheels with 9 x 100 quick releases, but a cover cap for the rotor mount is supplied. The dynamo is made of aluminium and is suitable for wheel sizes from 26" to 28" . The shell is either black or silver, the quick release lever always silver. Information regarding the return of batteries and electrical equipment:Information on the return and disposal of used batteries and electrical equipment can be found here. Specifications:Series:Alfine S500Application:City & TouringOutput:6V/3W (according to StVZO)Efficiency:min. 30%Over Locknut Dimension:9 x 100 mm quick releaseSpoke Hole Count:32 hole, 36 holeBrake Type:Center Lock DiscTechnical Information:Body Material:aluminiumSeals:contactFlange Distance (L/R):52.1 mm (29.85 mm/22.25 mm)Partial Bolt Circle Diameter (L/R):70 mm/70 mmSpoke Hole Diameter:2.0 mmWire Connector:E2-TYP (= meets current European standards for two lights)Approved For:Street Use in Germany:yesCheck Number:K~~595Features:for wheel size 26" -28" (646-716 mm outer tyre diameter)quieter compared to the predecessoruse with Center Lock disc brakesanodised hub shellaxle length 108 mm3.8 mm offsetquick release (133 mm long) with galvanised steel axle and anodised aluminium leverManufacturer Numbers:sliver 32 hole:E-DHS501BSGsliver 36 hole:E-DHS501ASGblack 32 hole:E-DHS501BLGblack 36 hole:E-DHS501ALGContents:1 x Shimano Alfine DH-S501 dynamo hub1 x Shimano quick release1 x Shimano Center Lock cover1 x Shimano wire connector1 x Shimano SM-DH10 overvoltage protector Weight: black | 32: 564 g Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com