Lots of developments in bicycle gearing the last couple of years.
The Pinion system has an almost lateral approach as they decided to put the gearing where the force is put unto the bicycle, the "pinion"
I like there approach a lot and tests seem to show it works briliantly, with a belt drive this could be close to the ideal bicycle with current technology.
In their favour:
- excellent gear placement
- sequential shifting
- shiften both under power and while standing
- good weight distrubution
- sealed system.
Not so favourable:
- needs spcial frame
- still a startup, so how will it be in a couple of years..