The Brompton Sprocket Set is designed for 3-speed Sturmey Archer bikes and features a 3/32 inch size with 3 splines and 14 teeth.

When replacing sprockets on your Brompton, it is recommended to also replace the chain at the same time. The chain can wear down and stretch over time, especially when used with worn sprockets. By replacing both the sprockets and the chain together, you can ensure that all components are working together smoothly and efficiently.

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