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Why to use a bicycle front gearbox?

Sep 132012

But why to use a gearbox at all instead of front derailleur? Watch the movie!
Other recommended videos:

one chainring
makes that all

how efneo works?

the story of efneo

prototype Dec’12

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Pingback: Crank-based gearbox in development | P.O.R.C. Online
http://www.facebook.com/PHIL.C0X Phil Cox

Very exciting I wait with interest well done :)

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