Product Description The Alivio DH-T4050-1D dynamo hub by Shimano provides 1.5 watts The Alivio DH-T4050-1D is a dynamo hub by Shimano for touring bikes with Center Lock disc brakes that produces 1.5 watts of output power. This means it is only approved for use with an LED lamp. The dynamo fits wheels from 18" to 28" that have a quick release system and an installation width of 100 mm. It was designed for maximum efficiency and boasts low rotational resistance. The housing is made of painted aluminium, the axle is made of steel. 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: Alivio T4000 Application: City & Touring Output: 6V/1.5W Efficiency: min. 30% Over Locknut Dimension: 9 x 100 mm quick release Spoke Hole Count: 32 hole, 36 hole Brake Type: Center Lock Disc Technical Information: Body Material: aluminium Seals: contact Flange Distance (L/R): 51 mm (27.4 mm/23.6 mm) Partial Bolt Circle Diameter (L/R): 67 mm/67 mm Spoke Hole Diameter: 2.0 mm Wire Connector: E2-TYPE (= meets current European standards for two lights) Approved For: Street Use in Germany: yes, when connected to LED lights Check Number: K~~1085 Features: for wheel size 18"-28" (448-716 mm outer tyre diameter) downsized design for more efficiency internal coil construction made of aluminium lower resistance to rotation for less strain when driving painted hub body axle made of galvanised steel axle length 108 mm 1.9 mm offset quick release (133 mm long) with coated steel axle and coated aluminium lever Manufacturer Numbers: 9 x 100 mm / 32 hole: E-DHT40501DBL 9 x 100 mm / 36 hole: E-DHT40501DAL Contents: 1 x Shimano Alivio DH-T4050-1D dynamo hub 1 x Shimano wire connector 1 x Shimano quick release Weight: black | 32: 565 g Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com