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Rohloff Speedhub
14-speed Internal-Gear Hubs:

The 14 speed Rohloff Speedhub is a triumph of Teutonic technology--
German design and precision craftsmanship at its finest!

Rohloff hub cutaway
Click for an even larger view 189 kb.
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 individual gear ratios, the single increments and the entire range of gears are determined by the design of the internal gear system and cannot be changed. Neverthless you can customize your gearing by substituting different chainrings and cogs for easier or higher gearing.

The hub is specified with a 16 tooth rear sprocket but 15 and 17 tooth steel cogs and 15, 16 and 17 tooth aluminum sprockets are available. Recommended chainrings are 42, 44 or 46 teeth.

The Speedhub 500/14 has been developed for racing which means that it can handle the heavy loads encountered during competition. Maximum torque loads in extreme conditions can be as high as 250 Nm on the crank (=150 kg on the pedal). This will not damage the the gear box because the high chainwheel/sprocket ratio transforms the low number of crank revolutions into a higher number of revolutions at the cog. The higher the chainwheel/sprocket revolution ratio, the lower the torque transmitted to the gearbox. For this reason you must not use a chainring/cog ratio of less than 2.4.

The chart below displays gear developments in meters for several chainwheel and sprocket combinations, with typical MTB wheels.

To maintain optimum functionality and safety of the Speedhub, the lowest allowable gear combinations are 42/17, 38/16 or 36/15. These are the equivalent to a 22/32 combination on a conventional drivetrain.

There is no limit whatsoever for higher ratios which means that you can mount bigger chainrings than shown on the table for extreme downhill racing.

See also my Online Gear Calculator for Internal Gear Hubs

Gear Development Chart- Speedhub 500/14
 Sprockets/Cogs   17 Tooth  16 Tooth  15 Tooth
 Chainrings  from-to  from-to  from-to
 36 Tooth     ----     ----  1,38m- 7,25m
 38 Tooth     ----  1,36m- 7,66m  1,45m- 7,66m
 40 Tooth     ----  1,43m- 7,56m  1,53m- 8,06m
 42 Tooth  1,42m- 7,45m  1,50m- 7,92m  1,60m- 8,45m
 44 Tooth  1.48m- 7,81m  1,58m- 8,30m  1,68m- 8,85m
 46 Tooth  1,55m- 8,16m  1,65m- 8,69m  1,76m- 9,25m
 48 Tooth  1,62m- 8,52m  1,72m- 9,05m  1,83m- 9,66m
 50 Tooth  1,69m- 8,87m  1,79m- 9,43m  1,91m- 10.06m 
 52 Tooth  1,75m- 9,23m  1,89m- 9,81m  1,99m- 10,46m
 54 Tooth  1,82m- 9,58m  1,93m- 10,18m  2,06m- 10,86m
 56 Tooth  1,89m- 9,94m  2,01m- 10,56m  2,14m- 11,26m
 58 Tooth  1,95m- 10,29m  2,08m- 10,94m   2,22m- 11,67m
 60 Tooth  2,02m- 10,65m   2,15m- 11,32  2,29m- 12,07m
The SPEEDHUB 500/14 has been developed for both pros and performance-oriented hobby cyclists who can appreciate it because of its reliability, perfect single gear ratios, wide range of gears, low maintenance and easy operation.

The sealed gearbox ensures reliability and durability even under the toug- hest conditions. The even increments of 13.6% from gear to gear make it pos- sible to always ride at the performance peak. The overall range kes sure that you have the right gear in every situation. Pure fun is guaranteed.

The SPEEDHUB 500/14 is operated by a twist shifter which shifts by pulling separate cables up or down. The indexing of the shifting lies not in the shifter as with common designs, but inside the hub. There is no wear on the indexing system nor need to adjust it


Rohloff hubs are available from our Special Order Catalog


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