Meet our Brompton Advance Derailleur, a replacement 4-speed part for the P and T Line Bromptons. Bike Derailleurs are important for efficient and versatile gear rotations, but over time and with regular use, they can wear out. To avoid chain noise or slip, corrosion, damage, and poor shifting performance invest in our replacement Brompton Advance Derailleur for smooth gear shifting so you can enjoy a comfortable ride and navigate different terrains with ease.

With our Brompton Advance Detailleur, your multi-speed Brompton can shift your bike's chain between different gears and sprockets with ease for a smooth and reliable transition every time, allowing you to adjust resistance to suit different cycling conditions. Tackle those big city hills or cruise along city main roads with our Brompton Adance Derailleur replacement part.

Always check the state of your Derailleur and if you need a replacement part, invest in our Brompton Advance Derailleur so you can get the most out of your Brompton bike.