Micro Gainz 1.25LB Magnetic Weight Attachment for Nuobell Adjustable Dumbbells

Name: Micro Gainz 1.25LB Magnetic Weight Attachment for Nuobell Adjustable Dumbbells
Brand: Micro Gainz
Rating: 4.89 (3 reviews)

Buy Now · $49.99

Micro Gainz makes this magnetic attachment specifically for the original Nuobell 550 and 580 adjustable dumbbells, closing the gap between their stock 5 lb jumps down to 1.25 lb increments. Each half-moon, laser-cut steel plate weighs 1.25 lb, is 9/16” thick, and has a matte black powder coat finish, and mounts to a gap at the top of the dumbbell via four N52 neodymium magnets rather than clamping onto the handle – so it doesn’t eat into the Nuobell’s already-short grip space the way a universal clamp-on plate would. A raised tab lets you pull it off with a thumb. Plates are made in the USA and sold as a 2-piece (2.5 lb total add-on) or 4-piece (5 lb total) set, both priced the same. It only fits the original Nuobell 550/580 – it does not reliably magnetize to the newer Nuobell S560/S5100, whose mounting gap is filled with a plastic piece.

Independent coverage is thin but leans positive on day-to-day use: ShreddedDad calls the design “clever” for solving Nuobell’s handle-space problem, praising the secure magnetic hold and easy on/off. The one dissenting voice is a YouTube reviewer (posting an affiliate link for a competing mechanical-lock product) who reports the magnets can let go during ballistic movements like dumbbell snatches – a concrete flag for anyone doing fast or explosive work, though not a neutral source.

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

Origin	Made in USA
Removal	Raised thumb tab
Markings	Pressed-in logo and weight
Material	Laser-cut steel, matte black powder coat
Thickness	9/16"
Attachment	4x N52 neodymium magnets per plate, mounts to the gap at the top of the dumbbell
Set options	2-piece (2.5 lb total add-on) or 4-piece (5 lb total add-on)
Manufacturer	Micro Gainz
Compatibility	Nuobell 550 & 580 (original generation) only -- does not reliably fit Nuobell S560/S5100
Patent status	Patent pending
Weight per plate	1.25 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

	Micro Gainz 1.25LB Magnetic Weight Attachment for Nuobell Adjustable Dumbbells	Pinnacle™ Bumper Plates	Weight Plates - Custom/DIY	Hansu Deep Dish Plates
GymRadar rating	4.89/5	4.89/5	4.89/5	4.89/5
Price	$49.99	$69.99
Origin	Made in USA
Removal	Raised thumb tab
Markings	Pressed-in logo and weight
Material	Laser-cut steel, matte black powder coat	Crumb rubber (recycled)		Ductile iron
Thickness	9/16"
Attachment	4x N52 neodymium magnets per plate, mounts to the gap at the top of the dumbbell
Set options	2-piece (2.5 lb total add-on) or 4-piece (5 lb total add-on)
Manufacturer	Micro Gainz			Hansu Power
Compatibility	Nuobell 550 & 580 (original generation) only -- does not reliably fit Nuobell S560/S5100
Patent status	Patent pending
Weight per plate	1.25 lb

4.9/5 · 3 GymRadar reviews

Reviews by source

Expert	4.89/5	3 reviews
Youtube	2.5/5	1 reviews	Garage Gang Gyms (Coach Josh): magnets can let go during ballistic movements (snatches, renegade rows); switched to a competing mechanical-lock product and discloses an affiliate link for it, so treat as one biased data point, not consensus.

A purpose-built way to close the Nuobell’s stock 5lb jumps down to 1.25lb increments without eating into its already-short handle: two half-moon, powder-coated steel plates that magnetize onto the gap at the top of the dumbbell. Functionality is the standout for its intended use case – reviewers praise how it fills a real gap for isolation work like lateral raises and curls where a full 5lb jump is too large, and it doesn’t compete for handle space the way a clamp-on plate would. Durability under dynamic load is the weak spot: one reviewer (via an affiliate link for a competing mechanical-lock product, so not a neutral source) reports the magnets can let go during ballistic movements like dumbbell snatches, a concrete safety flag worth taking seriously for anyone doing fast or explosive work rather than steady presses and curls. It’s also strictly compatible with the original Nuobell 550/580 – it does not fit the newer Nuobell S560/S5100.

+Functionality: fills the gap between Nuobell's stock 5lb jumps down to 1.25lb increments, useful for isolation work like lateral raises and curls where a full jump is too large (manufacturer product page, ShreddedDad)
+Functionality: half-moon shape mounts to the top gap on the dumbbell rather than consuming handle space, unlike a clamp-on plate (ShreddedDad x2)
+Build quality: laser-cut steel with matte black powder coat and 4 N52 neodymium magnets per plate, made in USA (manufacturer product page)
+Value: quick on/off via a raised thumb tab, no tools needed (ShreddedDad)

−Durability: one reviewer (affiliate-linked to a competing mechanical-lock product) reports the magnets can let go during ballistic movements like dumbbell snatches or renegade rows (YouTube: Garage Gang Gyms)
−Versatility: only fits the original Nuobell 550/580 -- does not reliably magnetize to the newer Nuobell S560/S5100 (manufacturer product page, confirmed on Micro Gainz's own YouTube channel)
−Value: at $49.99 for either a 2-plate (2.5lb total) or 4-plate (5lb total) set, it's a premium per-pound price for an accessory

$49.99

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