Replacement chains for your 16 inch wheel Brompton

If you are looking for G Line chains please click here to go to our G Line spares section

Current Brompton folding bikes use two different specs of chains:

• The Brompton A Line / C Line use an 8 speed chain
• The Brompton P Line / T Line and Electric C Line (4-speed / 12-speed - 2023 on) use a 10 speed chain

We made a short video on A / C Line chain length calculation

A: The chain length for a Brompton C line can be worked out based on the number of teeth on the front chain ring and the number of teeth on the largest rear sprocket - as shown in the table below (or watching the video even further down)

The Brompton chain for A Line / C Line comes with a PowerLink to make chain removal and installation easy

• We (and Brompton) recommend changing the rear sprocket(s) whenever the chain is changed / replaced (as they tend to wear together, so if you change just the chain, you may well find that the chain slips on the old sprocket when under load)

All current Brompton bicycles use a 3/32 inch 8-speed chain (made for Brompton by SRAM) - Previously these 3/32 inch chains were only used on derailleur (2 and 6 speed) Brompton bikes

A: The P Line / T Line (and since 2023 Brompton Electric P Line - 4-speed / 12-speed) comes with a choice of the following chains:

• Brompton SL Advance 102 Links
• Brompton SL Advance 104 Links 
• Brompton SL Advance 106 Links

These are 10 speed chains (the brand used by Brompton is YBN)

Please check the following table for the correct chain lengths:

We made the short video below to show how to:

• Choose the correct chain length / size
• Remove an existing Brompton chain
• Install a new chain on your Brompton