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Brompton Derailleur set, converts 1 speed to 2 speed, excludes cables View larger

Brompton Derailleur set, converts 1 speed to 2 speed, excludes cables

QDRRETSET1-2

Brompton

Brompton Derailleur set, for converting 1 speed to 2 speed, excludes cables (QDRRETSET1->2)

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£60.00

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Brompton Derailleur set, for converting 1 speed to 2 speed, excludes cables

The Brompton 1-speed / single speed folding bike uses the same rear wheel as a two speed Brompton. This kit contains what you need to add the derailleur mechanism and controls to conver from 1 to 2 speed

This conversion kit comprises the following:

  • Chain tensioner assembly (QCTADR) - this is different to the chain tensioner used on the 3 speed in that the jockey wheels have side-to-side movement to allow the chain to move between sprockets
  • Chain pusher assembly (CHPUA)
  • Chain pusher wing plate (QCHPUWPL/SP)
  • Cable spring outer 
  • Trigger with bell and cap (QGTRIGDRA) - is used on a pre 2017 model Brompton, this is the non-integrated shifter
  • Sprocket stack (12T/16T) - this is the Brompton 2 speed sprocket stack - consisting of a 12T shimano splined and a 16T shimano splined sprocket as well as a spacer and dust cover. These sprockets simply replace the single sprocket used on the 1-speed rear wheel
  • Chain 100 link (QCHAIN100DR) - assuming you have a 50T front chainring. If you have a 54T chainring then you will need a 102 link chain

You will also need the derailleur gear cable for your handlebar type / age of bike (integrated / non-integrated shifter)

Compatible with:

Brompton single / two speed rear wheel - QRW2SS (silver or black version)

Brompton 3 or 6 speed wide range rear wheel - QRW3SS-BWR

Brompton Q part code: QDRRETSET1->2
Brompton part number: 9012084

This was discontinued in 2018 with the introduction of the new integrated gear shifters, but we will make this kit up for you - the components will vary slightly depending upon the age of your bike

The short video below shows how the derailleur system works on a Brompton

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1 Question(s) answered - see below

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    Answered questions

  • Asked by jason cross
    on 12/03/2021
    hi i have a singlespeed id like to convert to a 2 speed but see youve discontinued the conversion kit my brompton is a 2015 and i wondered if it could still be done any response would be much appreciated thanks jason Answer:
    We make this kit up specially. If you can tell us your handle bar type, we will let you know what parts you will need to order.

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