CO-2.5KG Olympic Pressure Ring Collar

Name: CO-2.5KG Olympic Pressure Ring Collar
Brand: Ivanko
Rating: 3.81 (7 reviews)

Ivanko’s CO-2.5KG is a competition-grade compression-ring collar for 50mm Olympic barbell sleeves. Unlike a clamp or spring collar that grips at a few pinpoint spots, the internal pressure ring squeezes the bar’s full circumference, and a knurled spin-lock removes any remaining slack between the collar and the loaded plates. Each collar is fully machined and finished in grey hammer-tone enamel; a pair is calibrated to weigh a precise 5 kg (11 lb) total, which is why it’s a fixture in IPL/USPA, WPC/APC, and AAU-sanctioned powerlifting meets.

That competition pedigree comes with home-gym trade-offs. A longtime owner (YouTube: Basement Brandon) rates the build quality highly but found the two-step tightening process loosens under the repeated bar-drop impact of multi-rep training – deadlifts especially – since the design assumes a single meet attempt rather than a training set, and at roughly $120-150 a pair he calls it overkill for home use. GymRadar’s tracked owners agree on the shape of that trade-off: 3.81/5 overall, with build quality rated highest (4.57/5) and value rated lowest (2.86/5).

Weight	5 kg (11 lb) per calibrated pair
Material	Fully machined steel and cast iron, baked-on grey hammer-tone enamel finish
Quantity	Sold as a pair
Approvals	IPL/USPA, WPC/APC, AAU competition-approved
Mechanism	Internal pressure-ring compression collar with knurled spin-lock
Sleeve space	~74mm (2-29/32 in) per collar
Compatibility	50mm Olympic barbell sleeves (49.5-50mm)

What is a Collar?

What barbell collars are

Collars (clips) lock the plates onto a barbell’s sleeves so they can’t slide or rattle off — a safety essential, especially for pressing and Olympic lifts. The common types: cheap spring clips, quick lock-jaw / quick-release collars (the everyday favorite — fast and secure), and competition collars (precision-weighted, 2.5 kg each, for calibrated meets).

What to look for

A secure clamp that won’t creep under drops or high reps, quick on-and-off operation, and a fit for your bar’s sleeve diameter (standard Olympic is 50 mm). For most home gyms, a pair of lock-jaw-style collars is the right balance of speed, grip, and price.

How it compares

	CO-2.5KG Olympic Pressure Ring Collar	Magnetic Clamp Collars	TwistLock® Pro Barbell Collars - Black	2" Olympic Speedlock Vintage Collars
GymRadar rating	3.81/5	3.82/5	3.7/5	3.56/5
Price	$123.00	$35.96	$69.97
Weight	5 kg (11 lb) per calibrated pair	0.2 lb per collar	1.42 lb (pair)	~5 lb per collar (~10-11 lb per pair)
Material	Fully machined steel and cast iron, baked-on grey hammer-tone enamel finish	plastic body with a rubberized interior grip	aluminum with polymer and neoprene laminate; medium volcano knurling	Heavy-duty cast iron
Quantity	Sold as a pair
Approvals	IPL/USPA, WPC/APC, AAU competition-approved
Mechanism	Internal pressure-ring compression collar with knurled spin-lock	one-handed lever-based quick-release clamp
Sleeve space	~74mm (2-29/32 in) per collar
Compatibility	50mm Olympic barbell sleeves (49.5-50mm)

3.8/5 · 7 GymRadar reviews

Reviews by source

Expert	3.81/5	7 reviews
Youtube	3.0/5	1 reviews

A genuine competition-grade compression-ring collar — fully machined, chrome-plated, and calibrated to a precise 5 kg per pair — that earns its highest marks for build quality (GymRadar owners rate it 4.57/5). The weak spot is versatility: a longtime owner found the two-step tightening loosens under the repeated bar drops of multi-rep home training, since the design targets single competition lifts rather than sets. Value trails too — at roughly $150/pair, GymRadar owners rate it lowest of the tracked dimensions (2.86/5), and one unit arrived with flaking chrome plating (Ivanko replaced it without hassle). Best suited to lifters replicating an actual competition setup, not daily training.

+Build quality: fully machined, chrome-plated compression-ring collar that grips the bar's full circumference, not just pinpointed spots (YouTube: Basement Brandon; ivankobarbell.com)
+Functionality: calibrated to a precise 5 kg per pair (11 lb) so competition lifters know exactly what they're loading, unlike uncalibrated spring collars (YouTube: Basement Brandon)
+Build quality: GymRadar owners rate build quality highest of the three tracked dimensions at 4.57/5 (n=7) (GymRadar)
+Durability: when one collar's chrome plating flaked out of the box, Ivanko replaced it promptly with no hassle (YouTube: Basement Brandon)

−Versatility: a longtime owner found them poorly suited to home multi-rep training — bar-drop impact from repeated reps (e.g. deadlifts) loosens the two-stage lock and lets plates shift, since the design targets single competition lifts, not sets (YouTube: Basement Brandon)
−Value: at roughly $150/pair delivered, GymRadar owners rate value lowest of the three tracked dimensions at 2.86/5, well behind build quality (GymRadar; YouTube: Basement Brandon)
−Functionality: the two-step tightening process (compression ring, then spin-lock) is slower between sets than easy-on/easy-off designs (YouTube: Basement Brandon)
−Durability: at least one unit arrived with peeling chrome plating, a QC miss despite otherwise heavy-duty construction (YouTube: Basement Brandon)

$123.00

Buy Now