For Internal Gear Hubs
12-14-17/ 11-14-18T Cog Set for Brompton/SA Internal Gear Hubs
Introduction Spec
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3 speed cog set for the for Brompton/Sturmey Archer gear hub equipped with the 3/4 speed freehub.
For this sprocket set to work well, the following is required:
- 11 or 12 speed chain
- Suitable derailleur shifter - (Note: Sturmey Archer 3 speed shifter for gear hub may not work well).
Aftermarket chain pusher (or derailleur), and spring set are not necessary.
Currently available in following sizes:
11T-14T-17T
11T-14T-18T*
12T-14T-17T
12T-14T-18T*
*Please note that 18T may interfere with the chain stay on some frames, although in many cases, this can be addressed with an additional washer, longer tensioner pulley axles. Please also contact us if you have question or request for other sprocket sizes.
Cog set content:
- 3 cogs, per selected sizes
- Alloy 7075 cassette lockring with spash proof seal
- Alloy spacer pack suitable for applications with or without factory dust cover. (Spacers may look slightly different from photos)
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Specifications:
Cog thicknesses, 1.65mm
Cog spacing, 2.1mm
11T, 12T, and 14T cogs have been machined for proper spacing and smooth shifting.
