Specification: Frame: Alloy 6061 T6 Gearshift: Shimano Nexus 7 speed Brakes: V Brake Tyres: Schwalbe Citizen Lights: Lumatec LED Daytime running light/parking light Drive System: BOSCH ACTIVA center drive 25 Km/h Battery: 36 V Li Ion 8 Ah Battery position: TH7 silver: carrier Size: 53cm