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Brompton wheels & drivetrain specialist

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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.

11T Cog for Derailleur 3/4/5 Speed System Ver.1

$11.5

11T Cog for Derailleur 3/4/5 Speed System Ver.2

$11.5

12T Cog for Derailleur 3/4/5 Speed System (Machined)

$11.5

13T Cog for Derailleur 3/4/5 Speed System

$10

14T Cog for Derailleur 3/4/5 Speed System (Machined)

$13.5

14T Cog for Derailleur 3/4/5 Speed System (Standard)

$6.75

15T Cog for Derailleur 3/4/5 Speed System

$6.75

16T Cog for Derailleur 3/4/5 Speed System (Machined)

$10

17T Cog for Derailleur 3/4/5 Speed System (Machined)

$10

17T Cog for Derailleur 3/4/5 Speed System (Standard)

$6.75

18T Cog for Derailleur 3/4/5 Speed System (Standard)

$6.75

19T Cog for Derailleur 4/5 Speed Gearing System

$6.75

21T Cog for Derailleur 4/5 Speed Gearing System (Standard)

$7.5

21T Cog for Derailleur 4/5 Speed Gearing System (Machined)

$12