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Joseph Kuosac Crankset for Brompton Bikes - Black

£114.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
Crank arms for Joseph Kuosac Crankset for use with Bromptons.

Arm length choice from 155mm to 195mm
Made from 7075 Aluminium
Weight: 420g (155mm) , 490g (160mm) , 480g (180mm)

To be used with:
Chainring/Spider - #46137T44
Bottom Bracket - #46138 OR #46139
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Questions & Answers (7) Q & A
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Questions & Answers (7)
what other chainrings can i fit with this on my brompton?
10 Mar 2021
I am interested in a shorter crank arm length for my brompton but am not too keen with JK's BB and Chainring. Is it possible to use others?
Suitable rings / spider are SJS Cycles part number : 46137; you need to use the JK spider but can use another ring. 130mm BCD.

I have already JK crankset 54/160, any suggest for comfy crank arm to change it ? 170 or 175? Thanks
31 Oct 2020
Hello, I'm afraid you would need a professional bike fit to know what crank length will be more comfortable for you.

JK 02.11.20
is there a special tool to torque the lock ring up to 40nm
20 May 2020
Hi, yes the IceToolz HollowTech II / Ultra-Torque / Howitzer Bottom Bracket Tool our part 23833 fits well. You will also need a torque wrench. Thanks
Joseph Kuosac cranks for Bosch active line plus
14 Apr 2019
Hello, I have a question about the Joseph Kuosac Brompton crankset 185 or 190mm. Do these cranks fit on a Bosch Active line plus E-bike motor?

Regards, Peter van Wieringen
The Netherlands
We have no direct experience of this, if the BB is ISIS standard then yes they would possibly fit.

Thanks - 15/04/19
Can the lock ring be bought separately?
06 Dec 2018
We do not list it separately, we may be able to get hold of it from JK if you wanted to contact us directly.

Thanks - 07/12/18
Is there any weight saving compared to stock?
02 Dec 2018
Unfortunately, especially taking into account the BB, there is not weight saving.

Thanks - 03/12/18
Tool for securing lockring of JK crankset
29 Jul 2018
I try to secure the lockring of the JK crankset - but neither bike repair shops nor me have the correct tool. Could you advice which tool (maybe from Parktool) I have to purchase, please?


Hi there,

You can use either - SJS Cycles part number : 37714 or SJS Cycles part number : 46845