French Patent # 2,851,222 - MAVIC

French Patent 2,851,222 - MAVIC main image

I am not sure that I completely understand what this patent is about. I must read it more carefully!

I suspect it covers a number of different systems that automatically select the best combination of front chainring and rear sprocket and move the derailleurs accordingly. As such it may be an attempt to offer a road-specific response to the EGS Synchro Shift twist grip for mountain bikes.

With a priority date of 2003, this patent comes some years after the release of the MAVIC Mektronic.