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Brompton chain ring / guard assembly for 50T spider crankset



Replacement 50T Brompton chain ring / guard assembly - 50 teeth - for the new 2013 "spider" Brompton crank.

This 50 tooth chain ring is the standard on the 3 and 6 speed Bromptons.

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We have 9 in stock


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Brompton 50T spider chain ring / guard

The new Brompton "Spider" crankset was introduced on new Brompton bicycles at the beginning of 2013.

This is a replacement 50 tooth chain ring complete with guard.

Colour: Silver (also available in black)

It can be used to replace the 44, 50 or 54 teeth chain rings on a "spider" type crank. (a different chain length will be required if you change the chainring size)

A standard 3 or 6 speed Brompton comes with this 50 tooth front chain ring

Brompton Q part code: QCHRINGA-SPI-50
Brompton part number: 9020171

This is now also available as a black chain ring (availability can vary) - using Brompton Q part code: QCHRINGA-SPI-50-BK

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    Answered questions

  • Asked by Campbell Ritchie
    on 17/07/2022
    I have the older style chainring fixed to the crank and the two are attempting a bid for freedom. I presume I can use the new crank and separate ring. Do I need sleeves, or do they come with the crank? Do I need to change the bottom bracket? Answer:
    You will need to order the new crankset and a bottom bracket, links as follows: available as 44 and 54 tooth chain ring. note the tools required as stated on the bottom bracket page.Hope this helps and please let us now if you have any further questions.

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Data sheet

Comm Code87149990