Brompton Advance 4-speed Sprocket Set

Brompton Advance 4-speed Sprocket Set

This is a kit of parts making the sprocket stack for fixing to the following Brompton folding bikes:

• Brompton P Line 4-speed / 12-speed
• Brompton T Line 4-speed / 12-speed
• Brompton C Line Electric 4 speed / 12 speed
• Brompton P Line Electric 4-speed / 12-speed
• Brompton G Line Electric 4-speed
• Brompton T Line Electric 4-speed

The 4-speed sprocket set pack contains the following: (From centre of wheel to wheel nut)

• metal spacer
• Black plastic chain guard
• 18 tooth rear sprocket - Shimano HG style 9 spline fitting
• plastic spacer
• 15 tooth rear sprocket - Shimano HG style 9 spline fitting
• 13 tooth rear sprocket with integrated spacer - Shimano HG style 9 spline fitting
• 11 tooth rear sprocket with integrated spacer - Shimano HG style 9 spline fitting
• SunRace lock ring 

Complete with fitting diagram

Tools required for removal:

• Cassette lockring tool
• Chain whip

Tools required for installation:

• Cassette lockring tool
• Grease
• Torque wrench (to tighten the lock ring to 40Nm - that's tight!)

We made the following short video showing how to remove and install the Brompton 4 speed sprocket set

And once you've installed your new sprockets - they may need indexing / fine tuning / setting up 

so

We also made this short video on how to adjust the 4 speed gears on your P Line and T Line (and 2023 on 4 speed Brompton Electric)

Brompton Q Part code: Q102695