Rohloff Speedhub 135mm Rear hub

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Hub Data
Manufacturer Rohloff
Model Speedhub
Descriptor 14spd internal, 526% range
Position Rear
Axle Type 10mm
OLN 135 mm
Spoke Interface Type J-Bend
Brake Compatibility disc, Rohloff
Drive Interface single cog driver
Internal Gearing 14 speed
Dynamo Type none
Spoke Hole Diameter 2.7 mm
Left Flange Diameter 100 mm
Right Flange Diameter 100 mm
Left Flange Offset 30 mm
Right Flange Offset 30 mm
Mid-Flange Offset 0 mm (centered)
Weight 1825 g
URL http://www.rohloff.de/en/technical/speed...
Metadata
Hub ID 172
Record Status Public
Created Feb 12, 2010 12:39pm
Contributed By
hub dimension diagram
Available in rim brake and disc brake versions. Disc brake requires the use of the external shift mechanism, which is slightly heavier than the internal mechanism, but is also more robust and allows you to shift gears manually (at the hub) with an 8mm wrench even if the shifter and/or cables are completely inoperable.

The disc brake version of this hub uses a proprietary 4-bolt rotor. The mounting bolts are m8x0.75 on a 65mm bolt circle diameter. (verified by Karl 10/22/11)

Also note that the driver cog mount uses a proprietary 6-start thread standard of m34x6 P6. (each thread helix has a pitch of 6mm, and there are six threads, so a 1mm thread pitch gauge drops perfectly into the threading) A 4-prong tool visually similar to a BMX freewheel remover is used to hold the hub driver stationary while a chainwhip loosens the cog. (the tool's prongs have an OD of 32.5mm, an ID of 28.2mm, and are arranged in symmetrical quadrants with a prong width of 5.92mm)

The hub comes stock with a 16t cog. 15t, 17t, and 21t cogs are available, and the 15/16/17t/21t cogs are all reversible to wear the other side of the cog teeth. Rohloff makes a 15t cog for applications with small wheel sizes, but it requires the teeth to be mounted off-center to clear the hub shell, and is thereby not reversible like the other cogs.

15/16/17t/21t cogs provide a chainline of 54mm, while the special 13t cog provides a chainline of 58mm.

The minimum allowed primary gear ratio is 1:2.35 to prevent potential damage to the internals from too much input torque. Here are the smallest permitted chainring sizes for each available cog:
13t cog = 31t or larger chainring
15t cog = 36t or larger chainring
16t cog = 38t or larger chainring
17t cog = 40t or larger chainring
21t cog = 50t or larger chainring
(For large riders or tandem applications, it would be wise to use a higher primary ratio)
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