Barbell collars are a small part of a barbell setup, but they do an important job. They keep the plates pressed together on the sleeves and reduce the risk of them moving outwards while the bar is being lifted. That matters for consistency, but also for safety. If plates start to slide towards the end of one sleeve, the load can become uneven. In the worst case, a plate can move far enough to come off the bar.
Different collar designs solve the same basic problem in different ways. Flip Locks are quick to open and close, spring clips are light and simple, while heavier weightlifting and competition collars are designed for more specific training and competition setups. For anyone choosing between barbell collars and barbell clips, the useful differences are holding strength, weight, speed of plate changes and intended use.
Why barbell collars matter for safety
A loaded bar does not always remain perfectly level during a set. Squats can shift slightly from side to side, a deadlift can touch down unevenly, and Olympic lifts involve far more acceleration and movement than a controlled machine exercise. Every change in angle gives unsecured plates an opportunity to move along the sleeve.
Once one side begins to shift, the load distribution changes as well. The bar can feel different in the hands or on the back, and further movement can increase the imbalance. Collars help keep the plates together and close to their intended position throughout the set.
This becomes especially important when the bar is moved dynamically or repeatedly returned to the floor. Weightlifting movements such as the snatch and clean and jerk place very different demands on a loaded bar than slow accessory work. A secure collar helps keep the loading consistent through those changes of direction.
Collars are still only one part of a safe setup. They do not replace rack safeties, appropriate spotting or sound lifting technique.
Flip Lock barbell collars: fast and secure for everyday training
Flip Locks use a lever to clamp the collar around the sleeve. Slide the collar against the outer plate, close the lever and it locks into position. Opening the lever releases the pressure so the collar can be removed quickly.
That makes Flip Locks particularly useful when the weight changes often. Warm-up sets, strength sessions with several working weights and functional fitness training can involve repeated loading and unloading. A quick release collar keeps those changes simple without requiring much effort between sets.
The Strength Shop Olympic Flip Lock Collars in Red are made for 50 mm Olympic-style sleeves and provide the straightforward lever mechanism associated with this type of collar.
For most general barbell training, Flip Locks offer a useful balance of secure clamping and fast handling.
Barbell spring collars: simple, light and quick
Barbell spring collars are the familiar metal clips used in many gyms. Squeezing the two handles opens the spring enough to slide the collar along the sleeve. Releasing the handles allows the spring to grip again.
Their main advantages are low weight and simplicity. There is no locking lever or screw mechanism to adjust, and an experienced lifter can fit or remove them within seconds.
Spring tension determines how firmly the collar grips the sleeve. A good spring collar on the correct diameter holds the plate stack together effectively during normal strength training, although it does not clamp with the same mechanical pressure as a well-fitted Flip Lock or competition collar.
For general gym work, warm-ups and sessions with frequent plate changes, spring clips remain a practical option.
Weightlifting collars: heavier collars for a different job
Weightlifting collars are more substantial. They sit firmly against the outer plate and have their own meaningful weight, so the collars themselves become part of the loaded bar.
The Strength Shop Weightlifting Collars, 2.5KG Pair weigh 2.5 kg each. With both collars fitted, they add 5 kg to the complete setup. That needs to be included when calculating the total bar weight.
This type of collar makes sense in Olympic weightlifting because the plates must remain securely positioned while the bar accelerates, changes direction and returns to the platform. The IWF specification for competition weightlifting uses two collars weighing 2.5 kg each, so competition-style weightlifting setups are built around that additional 5 kg.
Changing these collars takes longer than using a spring clip or Flip Lock. In this context, that is rarely the deciding factor. Secure loading and a predictable total weight matter more.
Calibrated competition collars in powerlifting
Competition collars are also calibrated. Just as calibrated plates and competition barbells are produced around tightly controlled weight specifications, calibrated collars allow the complete setup to be built around a precisely defined load.
In IPF powerlifting, the bar and both collars together account for 25 kg, with each collar weighing 2.5 kg. That means collar weight is part of the competition load rather than an accessory that is ignored in the calculation.
The Strength Shop Calibrated Competition Collars, 2.5 kg, IPF Approved are calibrated to their stated weight and designed for use with 50 mm sleeves. For powerlifters training with calibrated plates and a competition-spec Power Barbell, collars of this type make it possible to reproduce the loading logic used on the competition platform.
Olympic weightlifting follows a similar principle regarding collar weight. Competition collars are also 2.5 kg each and are included in the total load. The equipment and the way it is loaded differ between the two sports, but in both cases the collars are a defined part of the barbell setup.
Barbell collars vs clips: the practical differences
| Type | Holding method | Weight | Plate changes | Best suited to |
|---|---|---|---|---|
| Flip Lock collars | Lever-operated clamp around the sleeve | Light | Very fast | General strength training, Olympic lifts, functional fitness, frequent weight changes |
| Spring collars | Spring tension grips the sleeve | Very light | Fast | Everyday gym training, warm-ups, accessory work |
| Weightlifting collars | Heavy collar tightened against the plates | 2.5 kg each for the linked model | Slower | Olympic weightlifting, competition-style loading |
| Calibrated competition collars | Precision-weighted collar with a firm mechanical lock | 2.5 kg each | Slower | Powerlifting competition preparation and calibrated setups |
For everyday training, the main decision is usually between the speed of a Flip Lock and the simplicity of a spring collar. Heavy competition collars serve a different purpose. Their own weight matters, and they are intended for training where loading accuracy and competition-style equipment are part of the session.
Check your barbell sleeve before buying collars
The collars covered here are designed for 50 mm Olympic-style sleeves. Before buying a pair, check the loading sleeve diameter of the barbell already in use, especially if it was bought elsewhere or its specification is unclear.
The shaft diameter is a different measurement. A 28 mm or 29 mm barbell shaft does not mean that the collar should have the same diameter. Collars fit onto the loading sleeves at the ends of the bar.
A collar that does not match the sleeve cannot grip as intended, regardless of the locking mechanism.
Which barbell collars suit your training?
For general strength training, Flip Locks are the most versatile option when weights change often and a firm, repeatable lock is useful.
Spring clips suit straightforward gym training where low weight, simple handling and quick plate changes matter more than a stronger mechanical clamp.
For Olympic weightlifting, 2.5 kg weightlifting collars make sense when training is built around competition-style loading and the additional 5 kg is deliberately included.
Powerlifters using calibrated plates and competition equipment can take the same approach further with calibrated, IPF-approved collars. In that setting, the collar is part of the precision of the complete loaded bar.
Whatever the training style, the basic purpose stays the same: keep the plates where they belong so the load remains stable and predictable while the bar is moving.
FAQ
What is the difference between barbell collars and barbell clips?
"Barbell collar" is the broader term for equipment used to secure plates on the sleeve. "Barbell clips" is commonly used for spring collars and other quick fastening designs. Both serve the same basic purpose, although their locking mechanisms and holding strength differ.
Do you need barbell collars?
For normal loaded barbell training, collars are an important part of the setup because they reduce plate movement along the sleeves and the resulting risk of an uneven load. The correct collar depends on the bar, exercise and training environment.
Why do competition collars weigh 2.5 kg each?
In powerlifting and Olympic weightlifting competition-style setups, the collar weight is included in the total load. Two 2.5 kg collars add 5 kg to the barbell, so that weight has to be accounted for when loading the bar.