Gearbox specification - comparison with derailleur gears

Pinion C-Line

Unfolding: derailleur vs Pinion

Comparison of the drives

The stromerforum.ch - Moderator @bluecat has a graphical comparison of the drives here published.

The diagram shows the gear ratios. The derailleur gear system is based on an 11-42T cassette, a 52T chainring and 27½" (26″) tires.

Legend:
x12; x9; x6 = Pinion gearbox
S/A = Sturmey Archer
52-11 = Chain with 26″ tires
x-axis = gear
y-axis = unfolding (meters covered with one pedal rotation)

In this graph, the derailleur is compared with a cadence of 75 and the Pinion with a cadence of 60, so that the difference in gear development does not count.

Legend:
x-axis = gear
y-axis = gear step in km/h

Gearbox design calculator from Pinion

The Pinion gearbox calculator or a Pinion calculator helps you to select the ideal transmission setup. The internal ratio for each gear of all gearbox types is already defined. The entire range of a Pinion gearbox can be shifted to fast or slow with the secondary ratio to the rear wheel. By using sprockets or toothed belt pulleys of the same size, 1:1 tuning is also possible.

Cadence comparison chain / Pinion

If you want to know what the cadence is at vMax=45 km/h, here is a comparison of an ST3 with Derailleur gears and a Pinion C1.9.

Here you can see that the Pinion (Tf=62) requires around 10 revolutions/min less than the chain model (Tf=72).