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Anonymous2009-04-22 13:38
>>2
The Rohloff SPEEDHUB 500/14 is a 14 speed epicyclic internal hub gear for bicycles. It has 14 equally-spaced sequential gears operated by one twistgrip with no overlapping ratios. The gear range is wider than that of 27-speed derailleur systems. The Speedhub 36 500/14 has a gear range of 526 %, which means that the highest gear is 5.26 times higher than the lowest gear. Across the entire range of the 14 gears shifts increase or decrease in even increments of 13.6 %.
The Rohloff is a little heavier than a triple-chainset derailleur drivetrain with a similar spread of ratios. Being completely sealed it requires substantially less maintenance, especially when combined with a full chaincase. It can be used with a wider chain than most current derailleur gears, which reduces wear on the driving gears. Gear changing is smoother than a derailleur; gears are changed when there is no pressure on the pedals. It is slightly less efficient than a clean and lubricated derailleur system and is much more expensive (currently around two to three times the price of a capable triple chainset, rear derailleur, cassette and hub). It is noisy in the lower gears, although users report that the noise is much reduced as the hub wears in.