Hub Dynamo with aluminum coil, about 80 grams lighter than its predecessor and with overvoltage protection SM-DH10. Product features Use: Trekking/Comfort Model: DH-3D32 Spoke hole: 36h Disc Brake: 6-hole Voltage/Power: 6V/3W Hole P.C.D.: 74mm Flange Distance: 51.1mm Offset: 4mm Over Lockout : 100mm Axle Length: 108mm Wheel size: 16-28 inch Electric power output connector: E2 Material Aluminum, Steel, Resin Color black Weight 685g Scope of delivery 1 Hub Dynamo DH-3D32 6-hole 36h black 1 Overvoltage Protection SM-DH10 1 Quick ReleaseShimano