Driving Mode: Electric Pedal with Assistance Chainwheel: Steel 44 T, Al alloy crank Frame: Alloy 6061# OD of Wheel: 20 Brakes: V brake[front] servo (rear) Derailleur: áSHIMANO 6-grade speed changeááá Continuous Distance: 30KM Electric System: Motor:200wá High Speed Brush Gear motor Performance: Maximum Speed: 25 km/h Packing: á1bike/ctn, fully folding OD of Wheel: 20 Motor:200wá Maximum Speed: 25 km/h