After testing the Gudereit LC-R and the Rohloff Speedhub across the Black Forest, I know I need some more power for steep inclines. A friend of mine politely checked the gear ratios of his bikes, both with 27 gear derailleurs, a trekking bike and a mountain bike.
The minimum and maximum transmission ratios of the Rohloff Speedhub are 0.279 (1st gear) and 1.467 (14th gear). The chainring of the LC-R counts 44, the pinion 17 teeth, resulting in a ratio of 2.6. This ratio multiplied with the ratio of the chosen gear results in the total ratio.
According to some web resources, the Rohloff also can be used with alternative chainring/pinion ratios like 42/17 (2.47), 32/13 (2.462), 36/15 (2.4) and 38/16 (2.375). The following table lists the ratios of both of my friend’s bikes, the current and the possible LC-R ratios:
|Gudereit LC-R 44/17||0.72||3.79||526%|
|Gudereit LC-R 42/17||0.69||3.6||526%|
|Gudereit LC-R 32/13||0.69||3.61||526%|
|Gudereit LC-R 36/15||0.67||3.52||526%|
|Gudereit LC-R 38/16||0.66||3.48||526%|
The current ratio is not bad per se. Instead it IMO is the optimal solution for the bike’s main purpose – travelling. But as I’m abusing it as a leisure bike in hilly regions, I’ll probably replace the 44 teeth chainring by a 42 teeth chainring, which seems to be a good compromise between power and speed.