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Domyos 28 mm Smart Lock Weight Training Collars

Sale price: $4.99 Regular price:

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.

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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.

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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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Very happy

Smart weight lock works very well and very happy

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Just perfect!

Great product! Can recommend it confidently for everyone

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Smart Weight lock

Excellent and quality product. Moreover, it is cheap and value for money.

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Not reliable

It moves easily under not-so-heavy weight. It has no specification on how much weight it can hold. I I have a dumbell with 5+2+1+1 KG plates and the clamp is too weak.

Doesn’t fit 28mm bars

Brought these to save the effort of spin locks during lockdown home workouts These do not fit any of my 28mm standard bars at all. Fall straight off and even go onto the bar without opening/loosing the lock Wish i read the reviews beforehand.


So quick and easy to use - far easier than metal clamps

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Does the job perfectly

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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


These have been excellent so far

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Ok as far as they go

Nice product but need a stronger grip. Ok up to rated weight but need a bigger brother

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Works well

Good product

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Plastic collars not fit for purpose!

Stay away from these collars if you intend on lifting anything heavier than 6kgs! Would not recommend these at all as they are dangerous! I've had them come off the barbell mid set narrowly missing my head! I have had to stop using them and use 28mm spring clips instead. I dont have a problem with any other Decathelon equipment, but i'm really surprised that these collars can pass a health and safety tes to be sold by them

28mm collars that don't fit 28mm bar

28mm collars that never fit my 28mm bar, so lose that they'd fall straight off without any weight on all, wish I read the reviews before purchase, hope i can take them back now theyve been opened

Only suitable for 14kg dumbells..

It says suitable up to 7kg per side of the dumbell, which isn't very useful. Doesn't scream quality when they only rate it for lighter weights. Better off buying spring collars

Not safe for anything but light weights

I wouldn't recommend these collars for anyone lifting anything but light weights. The loosen, the may slip and IMO they are dangerous. I've had one mishap and another near mishap with these. I don't know why Decathlon got rid of the old spin collars for this cheap rubbish, they make buying weights and bars from Decathlon not a good option any more.

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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

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual