Highly efficient, super light weight, premium grade 6 volt 3 watt dynamo front hub for easy to use to ridged 15 mm axle fitment. Provides bright illumination for safer night. : Amazon.de:
SHIMANO NEXUS 8-GANG SG-8R36 Premium Getriebenabe f. Nabenschaltung - NEU EUR 129,95 - PicClick FR
SHIMANO Nexus 8 Gang Drehschalter | Premium Bikeshop