2.5 lb Donut PlateMate Pair

Name: 2.5 lb Donut PlateMate Pair
Brand: PlateMate
Rating: 4.75 (8 reviews)

The 2.5 lb Donut PlateMate Pair is a set of two magnetic add-on weights designed for microloading – attaching to the ends of iron dumbbells, cast iron plates, or weight-stack machine plates to add smaller weight increments than a gym’s standard dumbbell or plate spacing allows. Attached one per side, the pair adds 5 lb total (2.5 lb each), letting a lifter turn, for example, a 40 lb dumbbell into a 45-pounder without buying an extra pair. They’re popular with owners of adjustable dumbbell systems (Nuobell, PowerBlock) for filling in intermediate weight steps, and see use in physical therapy and plateau-breaking contexts where small load increases matter. The strong magnet requires direct contact with exposed iron or steel – it won’t grip rubber, urethane, neoprene, or vinyl-coated dumbbells, and it isn’t compatible with kettlebells. The main community pushback is price: at roughly $70 for a pair, some buyers consider it expensive for what is functionally a coated magnet, with at least one r/homegym owner building a DIY alternative rather than buying PlateMate’s version.

Buying guide

Best Weight Plates for Your Home Gym — July 2026 Bumper Plates or Iron Plates? How to Pick Your First Set — July 2026 Do You Need Calibrated or Competition Plates? — July 2026 How Much Do Weight Plates Cost Per Pound? — July 2026 What Weight Set Should a Beginner Buy? — July 2026 Will Dropping Weights Damage Your Floor? — July 2026

Type	Donut (magnetic add-on weight)
Sold as	Pair (2 units)
Material	Magnetic steel core with protective coating
Thickness	1-1/8" (2.54 cm)
Manufacturer	PlateMate
Compatibility	Iron/steel dumbbells, cast iron plates, weight-stack machine plates, Olympic barbell sleeves
Inner diameter	2-1/4" (4.875 cm)
Outer diameter	4-1/2" (11.43 cm)
Weight per unit	2.5 lb
Not compatible with	Rubber-, urethane-, neoprene-, or vinyl-coated dumbbells; kettlebells
Total weight per pair	5 lb

What is a Weight Plate?

What weight plates are

Weight plates load your barbell — but “plate” covers two very different tools. Bumper plates are rubber discs around a steel hub, all the same ~450mm diameter, built to be dropped from overhead without damaging your floor or bar; they’re the default for Olympic lifting and CrossFit. Iron/steel plates are denser and thinner per pound, cheaper, and quieter to load, but most aren’t made to be dropped — better for slow, controlled powerlifting-style work.

What actually matters

Bumper vs. iron. Buy bumpers if the bar might hit the floor; iron (or rubber-coated iron) for controlled lifts and compact loading.
Weight tolerance. How far a plate strays from its stated weight (±1% is tight, ±3% loose). It barely matters for general training but adds up if you chase a specific total — which is why serious lifters add small change / fractional plates.
Collar fit & bounce. The center hole should fit your bar’s sleeve snugly; rubber durometer (around 88 Shore A) controls how “dead” a dropped plate lands.
Coating & set composition. Virgin rubber holds up and smells less than recycled crumb rubber; plan a starting set (usually a pair each of 45/25/10/5 lb plus change plates) around the lifts you actually do.

Who it’s for

Every barbell gym needs plates. Most home lifters should start with a bumper set, then add iron, change, or specialty plates as a second purchase once they know what their training is missing.

How it compares

	2.5 lb Donut PlateMate Pair	5 LB Set Color Fractional Plates	Thumper Thin Bumper Weight Plates	Schisler Eagle Head Vintage Weight Plates
GymRadar rating	4.75/5	4.75/5	4.75/5	4.73/5
Price	$69.90	$44.99	$259.99
Type	Donut (magnetic add-on weight)
Sold as	Pair (2 units)
Material	Magnetic steel core with protective coating	Steel core with rubber coating (0.25 lb plate is rubber only, no metal core)	Solid steel core with compression-molded polyurethane shell
Thickness	1-1/8" (2.54 cm)
Manufacturer	PlateMate	Titan Fitness	Weight It Out
Compatibility	Iron/steel dumbbells, cast iron plates, weight-stack machine plates, Olympic barbell sleeves
Inner diameter	2-1/4" (4.875 cm)
Outer diameter	4-1/2" (11.43 cm)
Weight per unit	2.5 lb
Not compatible with	Rubber-, urethane-, neoprene-, or vinyl-coated dumbbells; kettlebells
Total weight per pair	5 lb

4.8/5 · 8 GymRadar reviews

Reviews by source

Expert	4.75/5	8 reviews
Youtube	4.5/5	3 reviews
Reddit	4.0/5	4 reviews

The 2.5 lb Donut PlateMate Pair does one job well: it turns a fixed dumbbell or plate into a fine-grained microloading tool, and every source – manufacturer, retailer, video, and Reddit – agrees the magnetic hold is secure and the increments are genuinely useful for breaking plateaus or working around adjustable-dumbbell weight gaps (owners report using it alongside Nuobell add-ons to good effect). Its standout dimension is functionality: a strong, protective-coated magnet that grips iron dumbbells, plates, and machine stacks confidently. Its weakest dimension is value – the recurring community complaint is that ~$70 for a pair of coated magnets feels steep, to the point that at least one buyer built a DIY alternative rather than pay for PlateMate’s version.

+Functionality: strong magnetic hold that stays securely attached during sets, including drop sets (PlateMate; Iron Company)
+Functionality: precise 2.5 lb increments let owners skip buying an entire extra pair of dumbbells (PlateMate; YouTube unboxing/testing videos)
+Versatility: works on iron dumbbells, cast iron plates, and weight-stack machine plates, and pairs well with adjustable-dumbbell add-on systems like Nuobell/MicroGainz (r/homegym)
+Build quality: protective coating prevents scratching the equipment it attaches to (PlateMate manufacturer page)

−Value: recurring complaint that it's expensive for what amounts to a coated magnet -- one r/homegym thread built a DIY alternative specifically to avoid the price (r/homegym)
−Versatility: only works on exposed iron/steel -- won't grip rubber, urethane, neoprene, or vinyl-coated dumbbells, and isn't compatible with kettlebells (PlateMate manufacturer page)
−Durability: no long-term ownership reports found -- signal is limited to unboxing/early-use videos and a modest GymRadar sample (n=8)
−Build quality: one owner found it very difficult to remove once attached to a 45 lb plate specifically, though it stayed securely in place (YouTube unboxing video)

$69.90

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