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Bike Chain Lock 500

Sale price: $24.99 Regular price:
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Sale price: $24.99 Regular price:

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Model: 8399551

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Product Features

A photo of the Bike Chain Lock 500 in use

Bike Chain Lock 500 is designed for securing your bike during short stops (around 30 minutes).

Intermediate theft-proof bike lock, with the right length for attaching 2 bikes or your bike around large diameter fixed objects (e.g. trees, posts, railings...)


Short stops. Security rating: 5/10. Links with a cross-section of 6 mm


Usable length: 27.6". Ideal for securing frame and wheel to a fixed object.


1.9 lbs.

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Bike Chain Lock 500,base color

Product Customer Reviews

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Bike Chain Lock 500,base color
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Bike chain lock

It is sturdy and safe though heavy, which is expected. I am satisfied with it.

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Sturdy but heavy

A slightly heavy chain but definitely feels secure and better than the cheaper locks. Not stiff either and the cloth cover protects the bike. No chain surface is exposed.

Hi Vineeth!

Thank you for your review for the 500 Bike Chain Lock - Black!

This is a 'Must-Buy' chain lock for every cyclists out there! The cloth sleeve protects the chain steel from harsh weather elements. This way, it will take longer time to rust and corrode and prolong it's life. For a good quality chain, the material used must first be strong and dense. In return, the weight is increased but durability of the chain would also substantially increase too. However, for the convenience of every users, we are committed to improve our products for the future and your feedback matters as it will help us in our research and developments of products.

Thank you and have an awesome cycling session with us Vineeth!

Wave it Easy
Azhimy Senin
Sports Advisor
Decathlon Singapore
Could bought with bag!

Hi! I have been using this lock and its really this best. Some of might don't like but if you have bike bag then its really good and I am really feel safe as its really strong as well as its covered with a cloth type material with helps us to prevent scratches. If budget allows then go for it and please without cycling bag its really hard to carry it on your bike. You cannot tie this lock on cycle also. So 1st you have to buy a bike bag having enought space then go for it. ThankYou!

Bike chain

Doesn’t scratch my bike. A bit hard to do up. Doubled my security with a D lock tho because my bike Should remain mine.

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Difficult to lock and unlock

Bought this 6 months ago. The lock is very difficult to lock and unlock as the locking mechanism gets stuck. Would not recommend it.

I'm sorry to read that the lock is jammed. It's possible that some debris or grit may have entered the mechanism. Try a good few squirts of WD40  to clear it out  and try again. If the issue persists, please return it to us for a replacement item.
Peter, Cycling Manager, DECATHLON
lock keeps jamming

mechanism seems loose, lock keeps jamming after 1 month. poor quality. chain could be longer.

Thank you for your feedback regarding this lock.
IF you are no satisfied with it, please return it to us for a refund or an exchange.
Peter, Cycling Manager, DECATHLON
saved my bikes more than once

trust inspiring, just the right size, and not overly heavy, while providing adequate security - it has survived multiple attempts to steal my bike with no sign of damage or weakening!

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BTwin 500 chain lock

This chain lock does what it's supposed to well and has been most useful. My only niggle is the its short length, if it could have been six inches longer it would make the lock easier to tie to lampposts for instance. Other than that it's fine.

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Complicated to use

When close the lock you need to insert key. Most locks click in automaticly

Thank you for your feedback regarding this lock. I will forward this on to the team at B'twin who are in charge of this item.
Peter, Cycling Manager, DECATHLON
Good product

Value added products

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Everything is as expected but I appreciated more if the length of the lock was little longer

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Nice Product, sufficient strength.

Nice Product, sufficient strength, build quality is great.

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Me gustaría que fuera más larga porque no alcanza para la llanta, el cuadro y el tubo de estacionamiento.

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Aunq debería ser un poco más largo

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Bici segura

Junto con la traba en U ato mi bici a donde sea y la dejo super tranquila sabiendo que esta segura

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Additional Product Information



  • 100% Steel


  • 100% Polypropylene

Main fabric - Bottom

  • 100% Polyester cationic


Pick-proof lock. Comes with 3 keys.

Security score

The security rating helps you choose the lock that is most suited to your needs. To accomplish this, B'Twin defined a test protocol jointly with an independent laboratory, CNPP, based on real-life theft techniques. This unique protocol allows each lock to be given a comparable rating indicating how resistant it is to theft. This rating ranges from 0 (least secure) to 10 (most secure).(10 being fully theft-proof)



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