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Brompton 13 tooth rear sprocket 3mm for 3 speed and SRAM 6-speed



Brompton 13 tooth rear sprocket 3mm for 3 speed Sturmey Archer and SACHS/SRAM 6-speed with 3/32" chain

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We have 19 in stock


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Brompton 13T sprocket - 3 spline 

Replacement Brompton 13 tooth sprocket with 3 splines (ISO) - for 3 speed BSR wheel

The Brompton 3 spline (also known as ISO) sprocket will fit 3 speed Sturmey Archer (not BWR/wide ratio) or  3/6 speed SRAM/Sachs rear Brompton wheels. As used on the Brompton B75

The rear side of the sprocket has a flange / step built in - this should be facing to wards the hub/centre of the wheel

Click here for more info on the complete SACHS/SRAM sprocket stack

Brompton 2020 Q part code: Q100040
Brompton Q part code: QRSPR13DR
Brompton part number: 9024049 

Here is a short vide we made on removing your existing sprocket

In 2020 Brompton have started calling this: SPRKT 3/32" 3-Spln 13 6-Spd

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2 Question(s) answered - see below

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    Answered questions

  • Asked by Kathryn
    on 24/02/2021
    Hello, is this compatible with the Brompton B75? :) Answer:
    Yes these inserts are compatible with the Brompton B75
  • Asked by Tom
    on 23/08/2022
    When will this part be available again? Answer:
    We are not aware when it will be available again and think it may have been discontinued, there is an alternative, Brompton SA sprocket set 13T for any 3 spline Sturmey Archer, link as follows:

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    Data sheet

    Comm Code87149990