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Domyos 28 mm Smart Lock Weight Training Collars

Sale price: $4.99 Regular price:
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Sale price: $4.99 Regular price:

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San Francisco, 735 Market St. Options

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Model: 8380690

Product Videos

Product Features

A photo of the Domyos 28 mm Smart Lock Weight Training Collars in use

Domyos 28 mm Smart Lock Weight Training Collars is designed for The smart disc collar was developed by our coaches and design team.

These disc collars will transform your workout. They guarantee easy and effective tightening so that you can train safely and with confidence. They take less than 2 seconds using just one hand.


Effective and secure tightening: 5 points of contact on the bar.

Ergonomic grip

Can be fixed in place in 2 seconds using just one hand

Easy to put on

Special opening system to prevent rubbing against the bar.

Product Lifestyle Image Gallery

Image Gallery

Domyos 28 mm Smart Lock Weight Training Collars,base color

Product Customer Reviews

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Domyos 28 mm Smart Lock Weight Training Collars,base color
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great product

worth to buy

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Hello. We are thrilled that our products have met your expectations and hope we can serve you again in the future. If you have any inquiries, please don't hesitate to contact us at any of our Customer Care platforms. Thank you. 

Ansar Aiman

Weight lock

Very easy to use

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I like the clamps for fitting the weight to the bar.

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Not very durable / hardy.

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Very happy

Smart weight lock works very well and very happy

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Domyos smart weight training

Good stuff

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Best quality.

All sports products are with best quality & very reasonably priced.... awesome place for sports range.

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Domyos lock 28mm

Best lock I have ever used it's very good very secured for dummbell I loved It

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Perfect lock I ever seen

This lock is suitable only for Decathlon 28mm rods. I am used so many locks for so many size rods.I thinks this is a perfect rod and perfect lock... I am happy of this product.. thanks u guys

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Good Product

Great quality

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Good quality, does the job

I've been waiting for these to come in since march 2020 (non lockdown related but post part related). Always sold out. I've only just been able to order them successfully from this joke of a site. £3.50 but £5.99 for delivery?? is this a joke? not only that, parcel force 'attempted delivery' 3 days later (3 days when I spend this amount on delivery?? aye okay..) they didn't, I waited in for these all day. Not only that they said they'd posted a card through the door. again...lied. Frustrating when I really wanted these for my barbell. anyways, delivery prices is extortion and clearly using the lockdown BS for their profit

Excelent product

Good quality in normal coat

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Didn’t fit on rods

I asked for old style nuts for locks and got suggestions from decathlon’s employee to use this lock but it’s too loose. Wasted my money on this.

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Hello Manpreet,

Firstly, I would like to thank you for taking the time to write a review of our product. It is because of your constant reviews that we are able to improve on our products and services and are able to cater better towards your needs. 

I am so sorry that you had an unpleasant experience with the Smart Weight Lock Weight Training 28mm. We are working with our teams on an improved version of the locks that will be launched soon.

If you are completely unhappy with the product, you could exchange it or collect a complete refund for the same, from any Decathlon Store near you.

If you require more assistance, you may contact us directly at

Thank you,


Good product worth a purchase

Nice product

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Grip got worse, disks fall on floor over 7 kg

These are sooo bad, such a bad thing to sell, considering these might mess you up a lot if weights fall at wrong time.

Dear Sanchez,

Thank you for your rating and comments.

At the same time, we apologize that you had an unsatisfied purchase at our decathlon store. Our teammate will contact you directly to check for more details to understand the situation and as well to improve our products, we will also pass your valuable comment to our design team for future reference.

Regarding the safety instruction of this product, our producer does not suggest you to hold the bar vertically  if the weight is exceeding 7kg. 

Furthermore, if you would like to make a refund, please contact any of our Decathlon Hong Kong stores.

We are concerned with your shopping experience at Decathlon Hong Kong. So I sincerely thank you for spending your precious time writing us your feedback to help us improve.

Thank you and stay safe.


Decathlon Hong Kong Fitness Team


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Additional Product Information



  • 100% Polyamide


  • 100% Rubber - Thermoplastic

Compatibility: bar / disc collar

Disc collars are compatible only with our bars. Our standards for our bar diameters, which must not vary by more 1 mm, ensure the product stays in place. Use your smart disc collars only with DECATHLON 28 mm diameter bars. This product cannot be fitted on threaded bars.

Did you know?

Our DECATHLON bars and smart disc collars were designed to be used together. While our smart disc collars are compatible with our 28 mm bars, we cannot guarantee compatibility with other brands.



Product testing

Tested in use by more than 100 users (home use) Tested and approved in use at our DOMYOS CLUB fitness center by more than 2,000 members during a body sculpt class. In the lab: load test (guaranteeing the hold of the disc collar) In the lab: fatigue test (repeated opening and closing of the disc collar)

Storage instructions

We suggest regularly cleaning your disc collars with a cleaning product.

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

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual