Chain Tensioner - Black

Customer Reviews (2)
5 / 5| Write your review
£14.99 Please note this product has selling restrictions to your country. was
Manufacturer : 
SJS Cycles part number : 
Manufacturer part number : 
- For single speed, fixies, BMX and hub gears.
- Aluminium
- Black
- Arm length approx. 68 mm
Product Reviews (2)
Questions & Answers (6) Q & A
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Product Reviews (2)
Overall Product Rating 5 / 5
By Toby
27 Mar 2020
5 / 5
I recommend this product
ProsPrice - quality
Converted a cassette bike to alfine hub gear chain tensioner was fantastic.
Very good
By Pierre Noel
18 Mar 2019
5 / 5
I recommend this product
Prossimple and powerful
Very simple, easy to fit and powerful chain tensioner. A must have when you convert a vertical drop bike into single speed.
Questions & Answers (6)
Chain length
18 Oct 2023
Is there any guidance with this as to how the chain should be length-wise before you fit the tensioner. Of course it needs to be slack enough to be able to comfortably get the chain off the front ring or the wheel out of the vertical drop out, but should it be any slacker than that, and then just let the tensioner do its job?
It is recommended to have as much chain wrapped around the sprocket as is possible, too little and the chain will slip. SK 19/10/23
Will this fit a Pashley Parabike with Sturmey Archer Hub Gear?
04 Oct 2020
Hello, As we are not a Pashley dealer and have had no experience of this bike we cannot guarantee if this will fit or not.
Can I use this with a 1/8 th chain ? thanks
02 Oct 2020
Hello, Yes you can use this with a 1/8th inch chain.
Can I use this with an alfine hub and a double chain ring. If I can't what would you recommend?
27 Mar 2020
We could not recommend that a double chainring is a suitable option with an Alfine hub. We would need to know the two chainring sizes to make any advisory.

Thanks - 30/03/20
chain sizes
02 Feb 2019
hi, does this work with 3/32 chains and if so will it work with 9 speed chain? thanks
Yes this will be suitable with a 9 speed 3/32 chain.

Thanks - 04/02/19
Chain Tensioner
15 Apr 2017
Hi, I would like to know if the chain tensioner fits into the derailleur hanger of the frame or the drop outs? I have a trekking bike, converted to Alfine humb gear and would like to use the derailleur hanger. Also, the SHIMANO Alfine Chain tensioner CT-S500 with 2 pulleys did not fit as even with the spacers, adding up to 5 mm, the tensioner's pulleys did not align to the sprockets. The pulleys were too much towards the wheel. The distance centre of dropout to centre of sprocket is 25 mm. I assume that distance could be achieved with your chain tensioner?

This threads directly into the derailleur hanger on the frame. This tensioner is highly adjustable so you should be able to achieve the desired chainline with it.