Brompton Chainring and Guard for Spider Crank - 44T

Customer Reviews (3)
5 / 5| Write your review
£36.00 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
44t chainring and chainguard for 2013 and onward models

Please note Brompton have selling restrictions to some countries who have their own dealers. If you are unsure please contact our sales team.
Product Reviews (3)
Questions & Answers (10) Q & A
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Product Reviews (3)
Overall Product Rating 5 / 5
If you live in a hilly area - it's a great upgrade
By Chris Hogben
28 Jul 2021
5 / 5
I recommend this product
Makes a huge difference on the hills. Effectively, you're trading in some of your top speed for a greater ability to climb.
Smooths out those hills
By David Hudson
20 Mar 2021
5 / 5
I recommend this product
Easy to install and makes for a more relaxed ride.
Easier on the hills
By Anonymous
07 Aug 2020
5 / 5
I recommend this product
Very easy to install onto my Brompton, makes those hills a tad easier.
Questions & Answers (10)
Does rhis fit the stock crank/spider?
31 Oct 2022
Can I replace my stock 50T chainring without changing the spider arms on the crank?


Thanks for your enquiry, yes it fits straight onto the standard spider chainset

WD 01/11/22
Is the bolt diameter 134mmish. Thanks
05 Oct 2022
Thank you for your enquiry. The BCD of this Brompton chainring 130mm, we hope this helps.
JP 05/10/22
What speed chain can I use with this Chainring ?
10 Jul 2020
I'm planning to use one of these chainrings on a non-brompton.

Can I use this with a 10 or 9-speed chain ?

7/8 speed chains would be compatible replacements.
Brompton 44T Chainring
24 Jul 2019
Is this compatible with a 2019 model Brompton and is it possible to purchase it without a chain guard?


Hi there,

Yes, it is compatible with your 2019 Brompton. Unfortunately, we do not have any without a chain guard I'm afraid.

lower gears on a brompton?
19 Jun 2018
Do you stock a 38 teeth or even lower chainring that will fit a Brompton Spider arm? This one won't get me quite as low as I would like.
Hi there,

Any of our 130mm BCD 5 arm chainrings should work fine. However we have never tried this so we cannot say for certain.

Use with other cranks
02 Dec 2017
Can this be used with another 130 BCD crank arm, and will it run a 3/32 chain?

Yes these chain rings can be used with other non Brompton cranks and they use a 3/32 chain.

hi, is there a smaller chain ring that will fit the brompton 2013 onward spider
09 Nov 2017
40 or 38 perhaps

As the Brompton spider uses the standard 130BCD sized fitting there are plenty of aftermarket options that would fit and work. The only downside with the aftermarket options is that they won't have the chainguard. The one we recommend is SJSC part number 11055.

Will I Have To Reduce The Chain Length To Change From 50T To 44T.
17 Jul 2016

The chain will need to be reduced by two links to be the correct length for use with a 44T chainring instead of 50T.

Make It Easier To Pedal Up Hill?
04 Jun 2015
I have a 2013 Brompton with 6 Speed Standard gears. I just want to confirm that this is the chain ring I need to make it easier to ride up hill? Will I need to adjust the length of the chain too?


To gain a lower gear all you need to do is run a smaller chainring like this one. If you are dropping to a 44T ring on a 6spd then you will require a chain that is 98 links long.

Does This Fit On The Following Bike?
14 Aug 2014
Brompton Chainring Guard for Spider Crank 44T on a Charge Grater 2.

br mikael
Hi, unfortunately this will not fit the Charge Grater 2 as the chainset BCD is different. The Brompton chainring needs to fit to a crankset with a 130mm BCD, the Charge crankset has a BCD of 110mm so they would not be compatible. Regards, Jamie