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Elops 520, Bike Chain Lock

Sale price: $29.99 Regular price:

a good length bike lock that lets you attach 2 bikes or your bike around large diameter fixed objects (e.g. trees, posts, railings...)

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Sale price: $29.99 Regular price:

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8399572

Product Videos

Product Features

A photo of the Elops 520, Bike Chain Lock in use

Elops 520, Bike Chain Lock is designed for Our teams have developed this bike chain lock to secure your bike to different shaped attachment options.

a good length bike lock that lets you attach 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: 43.3". Perfect for securing 2 bikes.


2.2 lbs

Product Customer Reviews

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574 Reviews
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Elops 520, Bike Chain Lock,navy blue
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No hurry

This seems sturdy enough. It can be quite fiddly to get the key in the lock.

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Good lock

Lock does the job intended, at a decent price

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Good lock - works smoothly

I read all these reviews about these locks being finicky and getting stuck - so before using I sprayed some MO94 generously in the mechanism and it works a charm. Lock has been smooth though the cold season - you just have to push the key a bit to make sure it gets into the mechanism - no fiddling required! Lock is good combo of length and feeling secure while staying relatively light so you can carry it around your shoulder, seatpost or bag, and easily lock two bikes through frame and wheel. The only minus is that this lock (and other Decathlon chain locks) isn't in the 'Sold Secure' catalogue yet - be aware of this if you have bike insurance that requires your lock to be on the catalogue, these won't do... hopefully something Decathlon can arrange in the future, as these locks are great value!


For the price it's really good

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good product

feels solid and long

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Brilliant lock

This lock is brilliant, it's long enough to go around the frame and wheels, and is very reliable/strong.

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This lock actually weighs 1,4kg, quite a lot more than stated. Ce cadenas pèse en fait 1,4kg, beaucoup plus que ce qui est indiqué.

Worn out piece

The item I received boar many scratches at the housing lock assembly. It not was pristine brand new. Good side though is that it's heavy duty and gives me the confidence that my bikes are protected.

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bike chain review

Product is very much useful with its features..

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Works as it should.

This is not the type of lock that you would bring around with your bike. This is to secure your prized bike at your space at home. It's heavy and bulky and will intimidate would-be thieves.

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Feel More Secured

Adds security when parking your bicycle indoor and outdoor. Clean design and quality materials used. Keys are tough, too!

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Good quality

Recommended if you need to keep your expensive bike secured

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Hi Michael,

Thank you for taking the time to write a review on the Bike Chain Lock520. I am glad that this product has been working well for you and that you love it.

At Decathlon, our mission is to make sports accessible for the many. It is our responsibility to ensure that our products are made to satisfy our users. 

Feel free to write a review on other Decathlon products and I hope to see you in our store soon!

Sport on safely!


Omni-channel Sports Advisor

Decent lock, but too short, deceiving security.

The lock is good enough quality. There are two main issues, its too short to fit around many of the posts in Singapore and the lock chain while sturdy in itself is secured with a sheet metal tab inside the lock, would be fairly easy to pull the chain out of the latching mechanism with appropriate tools such as a car jack

Hi Nathaniel,

Thank you for taking the time to review our products. I am sorry to hear about your less than satisfactory experience with the Bike Chain Lock 520.

We'll bring your feedback to our design team to see how we can improve the length of the lock as well as the security of the lock in our future designs.

Thank you and sport on safely! :)

Skate safe! Skate fast!

Guo siong

Bedok Oxelo Sports Leader

Lock rust when expose to rain

Bought for less than 3 months. The internal lock would rust and get damaged when expose to the rain. If you are parking your bike in the rain. You can be sure it will get damaged in less than 3 months. Use plastic bag to cover the lock to prevent water. Bike was almost locked for good due to damaged.

Hello Allan,

Thank you for taking the time to review the Bike Chain Lock 520. We regret to hear that the locking mechanism has corroded. We strive to provide Quality products at Affordable prices for our users.

We encourage our users to park their bikes in sheltered areas. The metal components in a lock is susceptible to corrosion due to the nature of the weather in an Island Nation such as Singapore. Similar to bicycles, after water ingress, the product needs to be dry and layered with a coat of lubricant so that corrosion does not occur. This in turn would ensure the longevity of the product.

Once again, thank you for your purchase and we apologise for any inconveniences that this has caused.


A relatively solid & secure lock

Advantage: It is quite value for money with this price tag (S$25); its somehow solid material may deter someone from trying to steal your bicycle; long enough to secure your bicycle around a fixed object. Disadvantage: a bit heavy and the weight is about 1.3 kg, not less than 1 kg as advertised; no protective cover on the keyhole to prevent dust or water from entering into it. Something not tested: the security rating of this lock is 5/10 as advertised, however it has yet to be proven how long it takes to have this lock being cut in real life situation by using normal saw, bolt cuter or portable powered saw.

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Hi Kim Hock,

Thank you for purchasing our Bike chain Lock 520.
Yes, this lock does not have the same weather protection as some of our more expensive locks. However it is a pick proof lock designed for short stops and has a 5/10 rating from independent lab CNNP.

This video from our company explains how our locks are tested and rated by independent lab CNNP. 

Cycling Department Joo Koon
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Additional Product Information



  • 100% Polyester cationic


  • 100% Polypropylene


  • 100% Steel


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