An electric derailleur?

[karl101]

An electric derailleur for your electric bike?

Shimano showcases the Ultegra Di2 electronic bike gears, we go for a ride -- Engadget

I have my doubts about this. What happens when the battery goes flat? Suffering the loss of power in muscles in the thumb and fingers from prolonged use. It costs more than an electric bike (even a posh one), Also, it is, you know, a bit wussy.

Karl.

 

[yselmike]

I saw a bike at the bene-lux show ceramic wheels,electric gears weighed nothing only cost 10,000 euros.