13T 3-Speed Sprocket/Disc Set, 3-spline, 3/32"

13T replacement sprocket/disc set for 3-speed Brompton folding bikes fitted with a 3-spline Sturmey Archer rear hub and a 3/32" chain. Includes 13-tooth, 3/32" sprocket, rear sprocket circlip (for driver), spacer, and nylon chain-guide-disc.
This is what Brompton 3-speed bikes get shipped with.

Cogs and chains wear together!
- If replacing this sprocket we'd expect (and highly recommend) that you also replace the chain.

If you prefer to buy just the sprocket, find that HERE
All of our Brompton chains can be found HERE

Download Brompton's Instructions HERE.

FYI: While the chains and rear sprockets wear at the same rate and thus need to be replaced at the same time, chainweels (chainrings to us americans) wear slower due to the bigger surface area. You will only need to replace the chainwheels for every 2 (or 3) chains/sprockets.