New Bike Transmission

[neptune]

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.

 

[electric.mike]

I had a Daf car with that,still remember the add forward to go forward back to go back,great until the day it all came undone and the bits fell on the tray underneath.