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Brompton Derailleur chain pusher assembly - QCHPUA



Replacement Brompton derailleur chain pusher assembly

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Brompton chain pusher assembly 

This is the Brompton derailleur mechanism which pushes the chain tensioner wheels between the two rear sprockets on a two speed or six speed Brompton - it works in conjunction with the DR style chain tensioner (QCTADR)

Complete with wing plate 

The chain tensioner has not changed from the pre-2017 to the 2017 onwards integrated shifter derailleur - so is compatible with all year Bromptons (as long as it has the hexagonal braise on the rear triangle for connecting the wing plate)

Brompton 2020 Q part code: Q101186
Brompton Q part code: QCHPUA
Brompton part number: 9012169 

Note: there is a 'crack' in the wing plate to allow expansion of due to the paint on the Brompton frame

We made this short video on how the Brompton derailleur works

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2 Question(s) answered - see below

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    Answered questions

  • Asked by a guest
    on 23/07/2019
    Does the kit include wing nut and plastic spacer? Thanks! Answer:
  • Asked by Bilal
    on 20/01/2021
    Does this part include a wing plate on 2017 Bromptons? I'm following your instructions on the youtube video but there is no wing plate on my bike for the grub screws in the derailleur to push against. Im trying to find out if the design has been modernised in some way or if a wing plate is just missing on mine and i need a new one. Answer:
    Many thanks for the question. The wing plate comes with the pusher, but not on its own. Do you have a derailleur?

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Chain pusher assembly

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Data sheet

Comm Code87149950