http://www.bitraptor.com/en_andeguro_bike.html
Looks interesting . Covers a range of ratios equivalent to a rear sprocket cluster of 30 teeth down to 10 teeth. Claimed 97% efficiency. Continuously variable ratio. Could revolutionise crank drives.
Looks interesting . Covers a range of ratios equivalent to a rear sprocket cluster of 30 teeth down to 10 teeth. Claimed 97% efficiency. Continuously variable ratio. Could revolutionise crank drives.
