2019 Norcal FARA (Friedrich's Ataxia Research Alliance) Ride coming up June 1, 2019.
Join Kyle and Team FARA to kick this debilitating disease!
The Patterson Drive takes an existing drivetrain and gears it all up by 60% when needed. This makes a 28-tooth (28T) chainring feel like a 45-tooth (45T) chainring.
It gives you higher gearing for higher speeds.
Unlike the Schlumpf Speed-Drive (which uses a kick-button to shift gears), the Patterson Metropolis uses a conventional shifter to change gears.
This involves a shift cable, cable, housing, and a shifter. However, for people with limited foot strength or mobility, it might be the best solution.
The Patterson Drive is available in a 28-tooth (28T) configuration with integrated chainring guard.
The Patterson Drive uses a conventional English-thread external bearing bottom bracket and requires no extra machining for installation.