Jan 072013
Indoor movie, with gear change sequences: 1-2-3, 3-2-1, 1-3, 3-1 – all while pedaling!
And on the road:
The first 100%-metal efneo prototype mounted to the bike (December 2012).
Other recommended videos:

why use gearbox? 
Indoor movie, with gear change sequences: 1-2-3, 3-2-1, 1-3, 3-1 – all while pedaling!
And on the road:
The first 100%-metal efneo prototype mounted to the bike (December 2012).
Other recommended videos:

why use gearbox? 