Product Colors and Sizes

  • Sale product
  • Best Seller product
  • Eco-Friendly product
  • New product
  • Staff Pick product
  • In The News product
  • Innovation product
  • product

Domyos, 50 mm Smart Lock Barbell Collars

Sale price: $19.99 Regular price:

It is sturdy and compact, easy to fit on your Olympic barbell and efficient so that you can train safely and confidently. An essential and innovative accessory to secure your plates on your barbell.

Color: Select a color
Size: Select a size
Sale price: $19.99 Regular price:

Free returns

Free shipping over $35

Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8485052

Product Features

A photo of the Domyos, 50 mm Smart Lock Barbell Collars in use

Domyos, 50 mm Smart Lock Barbell Collars is designed for safely tighten your plates on your Olympic bar for weight training

It is sturdy and compact, easy to fit on your Olympic barbell and efficient so that you can train safely and confidently. An essential and innovative accessory to secure your plates on your barbell.


Sturdy plate collar, guarantees efficient and safe tightening

Easy to open/close

Fixes in place using just one hand

Easy to put on

Doesn't rub the bar: collar widens

Product Lifestyle Image Gallery

Image Gallery

Domyos, 50 mm Smart Lock Barbell Collars,base color

Product Customer Reviews

Skip to reviews
126 Reviews
Write a Review 

Domyos, 50 mm Smart Lock Barbell Collars,base color
Filtered by reviews Loading reviews…

Very easy to use with nice shape

icon-circle-checkmark verified purchase
olympic collars

These collars are well made, the quaility is really good they clamp on securely, the price is excellent for what you get, the locking clips are great too.

Collars slip on some bars

initially good fit now after about 6 months medium use for last 4 months they are slipping off my strongman log and plates actually fell off....

28mm version of this

You guys should seriously considered making a 28mm version of this! the 28mm collars you guys make now arent great at all, they only support 7kg on th vertical, that so bad.

Do the job required

Much better than the spring collars.

icon-circle-checkmark verified purchase
Disc collars

Very good

icon-circle-checkmark verified purchase

Good n nice

icon-circle-checkmark verified purchase
Not fitting

One of the disc collar is loose and not having the grip to hold the plates from slipping out.

icon-circle-checkmark verified purchase

Dear Sir,

Thank you for sharing your feedback with us and we apologize for the experience you have had.

Normally this should not happen. It maybe a one off case.

I would request you to exchange the product for a new one from any Decathlon Store near you.

Feel free to get back to me if you have any further doubts or queries.

Warm Regards

Debdatta Sen

Country Sport Leader

Cross Training & Body Building (India)


Very poorly designed. Can't use this at all Weights fall off



Slips from the rod

Inner rubber doesn't hold the bar tight. Had to make personal modification to make the product fit my Olympic bar.

Hello Syed, 


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


I am so sorry that you had an unpleasant experience with the Disc Collars 50 mm, as they are designed to hold the plates firmly on the Bar, this could be a one off case and such issues must not arise.


I can understand that you're disappointed in the product quality, therefore I request you to please head down to any of our stores to do an exchange or a refund. Due to the current COVID-19 crisis, we still have few stores which aren't fully operational yet. Therefore, I request you to kindly call your nearest store before you visit.


If you require more assistance, you may contact us directly at I would be eager to hear more feedback about our cardio range. 


Thank you, once again, Syed! Hope to see you in one of our stores soon :)


Slipping from the rod

The collars are slipping from the weight rod of 50mm. They are supposed to hold the weights tightly.

icon-circle-checkmark verified purchase
Disc Collar

Awesome and easy to use

very good quality at the right price

value for money. good built quality.

icon-circle-checkmark verified purchase

Very good locking system and bar grip

icon-circle-checkmark verified purchase
Skip to reviews

Additional Product Information


Spring collar

  • 100% Polypropylene

Grip 1

  • 100% Styrene ethylene butadiene styrene



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