Description:The power of the electrical:180W-350W;The capacity of the battery :12Ah-17Ah;The greatest speed per hour: 30 kilos per hour;The farthest journey:40-70 kilos;Change the number of times:450-600 times;The largest loading capacity:≤75 kilograms;Power consumption per hundred kilos:1kw*h;The system of rotating:roller chain;The material steel rim:aluminium alloy/steel