Homemade BB Drive Electric Bicycle скачать в хорошем качестве

Homemade BB Drive Electric Bicycle

This bicycle has a Unite MY1018Z 450W 24V motor attached to the cranks. The motor has a 7.18:1 gear reduction built into the motor itself, and there is an addtional 4:1 reduction from the motor to the cranks. I have a special freewheeling crank system that allows the motor to turn the chain and the pedals to remain stationary. I also have a Megarange freewheeling sprocket in which the smallest gear has 14 teeth, and the largest is 34 teeth. This gearing allows for a maximum speed of 28mph. Normal cruising is around 20 mph with no hills or wind. The beauty of this system is that I can use my bicycle's six gears to match road conditions. The motor sprocket has a freewheel so that if I pedal without the motor, there is no drag caused by the motor itself. Check out my video for making the freewheel sprocket on the motor:    • Homemade Freewheel Sprocket for MY1018Z Motor   Also check out my video of how I build my freewheel crankset with triple chainrings:    • Homemade Freewheel Crank with Triple Chain...   A link to this bicycle is now live here: http://www.evalbum.com/4206