A while ago we showed how to remove the Brompton bottom bracket

This applies to A Line / C Line / P Line and pre-2022 Brompton folding bikes (not Brompton Electric)

Here we show how to re-install it:

The method is the same for both the older fixed crankset (which generally uses a FAG 6 notch bottom bracket) and the newer spider crankset (which generally uses a 22 notch bottom bracket)

0:00 | Intro
0:59 | FAG 6 notch version
4:58 | 22 spline version
8:01 | Outtakes