Sprockets for modified gearing systems
For cog sets, please see the gear modification sections. If you have questions on selecting the correct sprockets, please feel free to contact us.
11-14-17/ 11-14-18T Cog Set for Brompton Derailleur Hubs
11T and 14T are machined for smooth shifting, and re-finished for corrossion resistence.
Introduction Spec
3 speed cog set for the derailleur 3 speed system - for Brompton derailleur hub equipped with 3/4 speed freehub.
For this sprocket set to work well, the following is required:
- Lock ring style free hub
- 11 or 12 speed chain
- Suitable shifter - (Note: Sturmey Archer 3 speed shifter for gear hub may not work well).
Aftermarket chain pusher (or derailleur) is not necessary.
Currently available in following sizes:
11T-14T-18T*
11T-14T-17T
Available in two color: Silver, and Black
*Please note that 18T will likely interfere with the chain stay, particularly for the titanium frame. Although in many cases, this can be addressed with additional steps. Please also contact us if you have request for other sprocket sizes.
Cog set content:
- 3 cogs, per selected sizes
- Alloy lock ring
- Alloy spacer pack (1.0mm x1, 2.1mm x1, 3.0mm x1) suitable for applications with or without factory dust cover
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Specifications:
Cog thicknesses, 1.65mm
Cog spacing, 2.1mm
11T and 14T cogs have been machined for proper spacing and smooth shifting.
