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Btwin 900, Bike Chain Tool

Sale price: $19.99 Regular price:

Remove, repair and refit your bike's chain. Compatible with 1 to 11-speed chains of all brands

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Sale price: $19.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8351521

Product Videos

Product Features

A photo of the Btwin 900, Bike Chain Tool in use

Btwin 900, Bike Chain Tool is designed for removing, repairing and refitting your bike chain. Compatible with 7 to 11-speed chains of all brands.

Remove, repair and refit your bike's chain. Compatible with 1 to 11-speed chains of all brands


Compatible with all standard chain types (1 to 11 speeds).


6.2 oz.

Product Customer Reviews

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389 Reviews
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Btwin 900, Bike Chain Tool,base color
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Bike Chain Tool

Good piece of kit and did exactly what I needed it for.

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Chain tool

Easy to use

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Excellent Value for Money

Needed to replace the chain on my bike and this little tool makes the job very quick and simple.

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The metal pin got bent when trying to break the chain. Fair enough it wasn't 100% aligned but I was expecting more from this. Cheap quality

Does what it's meant to do - with no fuss!

I have absolutely no idea why some people are saying this breaks after first use... I purchased this alongside the B'TWIN branded KMC X10-XL 10 speed, and cut through it like butter, with no fuss whatsoever! Excellent.

Faulty Pin, Had to Return

I wanted this chain tool as a sturdier option than the Btwin 500 chain tool I already have. It looks robust, yet after a couple of uses the pin bent and the tool was not longer fit for purpose. On that basis, I have to give this item a one-star review, which disappoints me as I'm usually very happy with Decathlon products. I eventually returned the damaged tool to Btwin and due to some confusion received a second Btwin 500 instead of the 900 I bought. I can't be bothered to return the duplicate as I've spent enough money, time and effort on an item costing less than £10.

I'm sorry to read that the chain tool was faulty but also that you received the incorrect replacement. I have arranged for a new 900 model to be sent to you FOC.
Peter Lazarus, National Cycling Manager, DECATHLON
Makes the job easy

Feels robust, and well made. Handle gives good leverage

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Looks good but not great quality metal

The pin bent on it after the second link! It looks good feels good but not of the highest quality

Thank you for your feedback on this chain tool. I will forward it on to the product manager at b'Twin.
Please return it to us for an exchange or a refund.
Peter Lazarus UK Cycling Market Manager DECATHLON

falls to bits first use

Hello Chris,

If you could feed back some more information as to what has happened to your bike tool that would be fantastic so I can pass this on to the product manager. In the mean time, you are more than welcome to return for an exchange or refund.

Rob Basnett b'Twin Product Expert DECATHLON
Best I've tried

Had tools like this for years but some last a few times then break or the pins bend but this one looks like it will last a long time might even be strong enough to break my motorcycle chain

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Worthless tool broken in less than one week

It got broken on first use. I needed to remove a couple of chains and put them back and I just was able to do one and it was broken. I couldn't believe as I wasn't expecting a life tool, but at least something useful for a while. I got it last week and now I am stuck and withouth bicyle and need to look another way to put chain. I can't recomend this product.

Kvalitní nýtovač za rozumnou cenu

Pevný, robusní, plně funkční pro řetězy 1 - 10

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Dobrý nýtovač

Zatím jsem spokojen. Funguje dobře.

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Kleines gutes Teil

Funktioniert einwandfrei

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handliches Tool. Funktioniert einwandfrei

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Additional Product Information



  • 100% Steel


  • 100% Polyamide



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual