The Patterson Metropolis is an economical way to extend the gear range of an 8-speed Terratrike.
You are here
Recumbent gearing calculator
We have converted an HP Velotechnik Gekko FX 26 to use trigger shifters as an experiment. It seems to work well.
This Terratrike Rambler fits right inside a Toyota Prius.
Patterson Metropolis 2-speed geared crankset extends gear-range of 8-speed Terratrike Rambler
Using the Shimano Nexus internally-geared 8-speed hub on any trike gives you the enclosed reliability of planetary-geared hubs, but it's a bit slim on gear range -- particularly with a small 20" wheel on