Power Block Sport Exp

Name: Power Block Sport Exp
Brand: PowerBlock
Rating: 4.48 (7 reviews)

The PowerBlock Sport EXP is a stackable, expandable adjustable dumbbell pair that starts at 5-50 lbs per hand and can be upgraded in place to 70 lbs (Stage 2 kit) and then 90 lbs (Stage 3 kit) without replacing the base set. A magnetic selector pin locks into a side rail to change weight in seconds, and two 2.5 lb “adder weights” per handle allow finer increments below the standard 10 lb jumps. Weight stacks are gray or black powder-coated steel; the handle has a contoured rubberized (non-knurled) grip. At its base size the set replaces up to 16 pairs of fixed dumbbells (825 lbs of free weight) in about a cubic foot of floor space, growing to a claimed 28-pair equivalent at full 90 lb expansion. PowerBlock backs the Sport EXP with a 5-year limited warranty for home use. Independent reviewers consistently rate the adjustment speed and space savings as the strongest features, with the main tradeoffs being a plain, unknurled handle, a boxy “stacked” look, and a need to adjust the weight only on a stand or hard, flat surface since a detached stack is more fragile than a traditional one-piece dumbbell.

Handle	Contoured rubberized grip (non-knurled), selector pin with magnetic lock
Replaces	Up to 16 pairs of fixed dumbbells (825 lb) at base size; up to 28 pairs at full 90 lb expansion
Warranty	5-year limited warranty (home use)
Dimensions	12"L x 6.5"W x 6.5"H at 50 lb; 14"L x 6.5"W x 6.5"H at 70 lb; 16"L x 6.5"W x 6.5"H at 90 lb
Manufacturer	PowerBlock
Weight range	5-50 lb per hand (Stage 1); expandable to 70 lb (Stage 2) and 90 lb (Stage 3)
Weight material	Powder-coated steel (gray or black)
Weight increments	2.5, 5, 7.5, 10 lb steps (10 lb steps above the base adder-weight range)

What is a Adjustable Dumbbell?

What adjustable dumbbells are

Adjustable dumbbells replace a whole rack of fixed dumbbells with one pair whose weight you change via a dial, pin, or selector plate. They are the space-and-money saver for home gyms: a single set can span roughly 5–50+ lb per hand. The trade-offs are bulkier handles, a fixed max weight, and a mechanism that can wear or rattle.

What to look for

Fast adjustment (dial or lever beats stacking plates), a wide and useful weight range, a balanced feel that doesn’t clunk mid-rep, and a durable locking mechanism. Many sets include or offer a stand — worth it, since the blocks are awkward to load off the floor.

How it compares

	Power Block Sport Exp	MX EVO MICRO WEIGHT PLATE UPGRADE	EVO MX100 Dumbbells	QuickDraw™ Adjustable Dumbbells
GymRadar rating	4.48/5	4.5/5	4.58/5	4.59/5
Price	$409.00	$79.00		$335.99
Handle	Contoured rubberized grip (non-knurled), selector pin with magnetic lock			32 mm volcano knurl
Replaces	Up to 16 pairs of fixed dumbbells (825 lb) at base size; up to 28 pairs at full 90 lb expansion
Warranty	5-year limited warranty (home use)		Manufacturer-stated drop/impact tolerance for manufacturing defects under normal home-gym use (~1 year per third-party review coverage; not itemized on the product page itself)
Dimensions	12"L x 6.5"W x 6.5"H at 50 lb; 14"L x 6.5"W x 6.5"H at 70 lb; 16"L x 6.5"W x 6.5"H at 90 lb
Manufacturer	PowerBlock		MX Select
Weight range	5-50 lb per hand (Stage 1); expandable to 70 lb (Stage 2) and 90 lb (Stage 3)			5–60 lb
Weight material	Powder-coated steel (gray or black)
Weight increments	2.5, 5, 7.5, 10 lb steps (10 lb steps above the base adder-weight range)

4.5/5 · 7 GymRadar reviews

Reviews by source

Expert	4.48/5	7 reviews
Youtube	4.5/5	3 reviews

The Sport EXP is PowerBlock’s mid-tier expandable dumbbell – a 5-50 lb steel-stack pair that upgrades in place to 70 lb and then 90 lb via separately sold expansion kits, replacing up to 16-28 pairs of fixed dumbbells in under a cubic foot of floor space. Functionality is the standout dimension: the magnetic pin-and-rail mechanism swaps weight in seconds with no gears or dials to fail, and three independent reviewers all rate the change speed as the single best thing about it, edging out dial-style rivals like the Nuobell Adjustable Dumbbell Set on speed even as reviewers admit Nuobell’s knurled handle and powder-coated plates look and feel nicer. Durability is mostly strong – no moving parts to wear out, and PowerBlock’s customer service replaced a broken weld free under warranty – but that same incident (a detached stack fell and snapped at a weld) is the clearest weak point: these need to be adjusted on their stand or a hard flat surface, not tossed around like a traditional dumbbell. Value is excellent at $409 for the base 50 lb pair, and build quality is solid if unglamorous: painted steel rather than the knurled, urethane-coated finish of PowerBlock’s own Elite EXP or a Bowflex SelectTech 1090.

+Functionality: magnetic pin-and-rail selector changes weight in seconds with no dial or gears, the standout feature across all three independent video reviews (YouTube: HSWWdvM8jhY, YouTube: The Carter Home Gym, YouTube: Nuobells comparison)
+Value: base 50 lb pair replaces up to 16-28 pairs of fixed dumbbells (over 2,500 lbs of free weight) for $409, with in-place expansion to 70 lb and 90 lb via separately sold kits (totalfitnessequipment.com, The Carter Home Gym)
+Durability: no moving parts to wear out in normal use, and PowerBlock's customer service replaced a broken weld free of charge under the 5-year warranty (The Carter Home Gym)
+Functionality: takes up less than one cubic foot of floor space and can be mounted vertically on a stand or reverse hyper, unlike a traditional dumbbell rack (YouTube: HSWWdvM8jhY, The Carter Home Gym)
+Versatility: works for pressing, rowing, curls, tricep extensions, and leg accessory work like any adjustable dumbbell pair (The Carter Home Gym)

−Durability: a detached 50 lb stack broke at a weld when dropped from about four feet -- PowerBlock recommends adjusting only on the stand or a hard, flat surface (The Carter Home Gym)
−Build quality: handle uses a rubberized grip rather than a knurled one, and the black powder coat shows scratches and wear faster than the gray finish (The Carter Home Gym, YouTube: HSWWdvM8jhY)
−Functionality: 10 lb jumps between most increments (5 lb only at the very bottom of the range) can be a large step for progressive overload on pressing movements (The Carter Home Gym)
−Build quality: the boxy stacked-plate shape draws recurring "loaf of bread" comparisons and rules out moves like a goblet squat or single-dumbbell pullover (YouTube: HSWWdvM8jhY, The Carter Home Gym)

$409.00

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