Weights · Research-based comparison
Best Adjustable Dumbbells UK
The best adjustable dumbbells for most UK homes right now are the NÜOBELL 2-20kg pair at £499 (checked 6 August 2026) — the most consistently recommended "best overall" pick across current UK guides, prized for its smooth dial and lack of rattle. On a tighter budget, the BrainGain SmartBells 24kg pair at £198.50 is the strongest option we found. This is a research-based comparison, not a hands-on review: we have priced, specced and cross-checked seven models against real UK retailers, but have not yet physically tested any of them ourselves.
This is a research-based comparison
We have not bought, assembled or used any of the seven products on this page ourselves. Everything below is built from manufacturer specifications, UK pricing checked directly against retailers on 6 August 2026, published warranty terms, and a read of verified owner reviews and independent UK coverage — not our own measurements.
No product here carries one of our own numeric scores, because a score requires hands-on testing under Test Bench v1.0, which we haven't done for this category yet. Our hands-on testing plan is near the end of this page, and this page will be upgraded with measured data once that happens.
The seven, ranked
Ranked on verified UK price, published specification and the weight of independent UK reviewer and owner opinion — not our own testing, which hasn't happened yet. Jump to any product below.
NÜOBELL 2-20kg Adjustable Dumbbells (Pair)
—/10How we testTraditional dumbbell shape, smoothest dial UK reviewers report, no rattle.
£499
at Fitness Superstore
BrainGain SmartBells 24kg Adjustable Dumbbells (Pair)
—/10How we test15 settings for under £200 — top budget pick at both T3 and Men's Fitness.
£198.50
at Amazon UK
Kayman 24kg Adjustable Dumbbell Set (2×12kg)
—/10How we testThe cheapest genuine quick-dial pair we found — but a 12kg-per-hand ceiling.
£110.49
at Amazon UK
MuscleSquad 27kg Adjustable Dumbbell
—/10How we testSold as singles from £155 each, with an all-metal Elite line to 40kg.
£155
at MuscleSquad
BodyMax Selectabell 25kg Adjustable Dumbbell
—/10How we testLong-running UK brand, sold as singles, 2-year warranty as standard.
£169
at Fitshop UK
Bowflex SelectTech 552i Adjustable Dumbbells (Pair)
—/10How we testThe most-searched name here — read the recall history below first.
£337.99
at Johnson Fitness UK
PowerBlock Elite EXP Stage 1 Adjustable Dumbbells (Pair)
—/10How we testStarts at 22.7kg per hand, expands to 40.8kg with kits sold separately.
£450
at Amazon UK
How do the specs compare?
Weight range, increment and warranty side by side. "Increment" is the smallest jump the mechanism allows — smaller isn't automatically better, but it matters if you're close to your limit on a lift.
| Product | Weight range (per hand) | Increment | Price (checked 6 Aug 2026) | Warranty |
|---|---|---|---|---|
| NÜOBELL 2-20kg | 2–20kg | 2kg | £499 pair | 2 years |
| BrainGain SmartBells 24kg | 2.5–24kg | 15 settings | £198.50 pair | 2 years |
| Kayman 24kg (2×12kg) | 2–12kg | 2kg, 6 settings | £110.49 set | On registration |
| MuscleSquad 27kg | 2–27kg | 10 settings | £155 single | See retailer |
| BodyMax Selectabell 25kg | 4.5–25kg | 15 settings | £169 single | 2 years |
| Bowflex SelectTech 552i | 2–24kg | 2kg, dial tray | £337.99 pair | See retailer |
| PowerBlock Elite EXP St.1 | 2.3–22.7kg | 1.13kg | £450 pair | See retailer |
How do adjustable dumbbells work?
Every adjustable dumbbell here uses one of two mechanisms to add or remove weight plates from a central handle without you touching a loose plate.
A rotating dial or collar — NÜOBELL, BrainGain, Kayman, MuscleSquad — sits at the end of the handle. Twist it to a marked weight and internal pins engage that stack of plates, releasing the rest onto a tray as you lift away. It's the fastest method in normal use and the one most UK reviewers say feels closest to a solid, traditional dumbbell once locked.
A pin-select system — BodyMax, PowerBlock — has a metal pin through a stack of plates mounted on the dumbbell itself. Pull the pin, slide it to your weight, push it back in; only the plates above the pin travel with the handle. Bowflex's SelectTech dial moves a selector plate through a tray of weights in a cradle — mechanically related, but built around a tray rather than a rail.
The mechanism, not the brand, determines how the dumbbell fails if something goes wrong — see which mechanism to trust below.
Are adjustable dumbbells worth it?
For most UK homes with limited floor space, yes. One pair replacing four to six sets of fixed dumbbells earns its cost back quickly, and stores in a fraction of the space. What "worth it" costs varies enormously between models though, which is where a straight RRP comparison misleads.
So we built our own comparison: price paid today, divided by the total kilograms of plate in the box (both dumbbells, at full capacity). No manufacturer publishes this figure — it's ours.
| Product | Total capacity | Price paid | Cost per kg |
|---|---|---|---|
| BrainGain SmartBells 24kg | 48kg | £198.50 | £4.14/kg |
| Kayman 24kg (2×12kg) | 24kg | £110.49 | £4.60/kg |
| MuscleSquad 27kg (2 singles) | 54kg | £310.00 | £5.74/kg |
| BodyMax Selectabell 25kg (pair) | 50kg | £304.20 | £6.08/kg |
| Bowflex SelectTech 552i | 48kg | £337.99 | £7.04/kg |
| PowerBlock Elite EXP St.1 | 45.4kg | £450.00 | £9.91/kg |
| NÜOBELL 2-20kg | 40kg | £499.00 | £12.48/kg |
Bowflex and PowerBlock use the street price we found on 6 August 2026, not RRP — at RRP the Bowflex 552i is nearer £11.46/kg. The pattern holds regardless: shape and headroom cost more per kilogram than simple quick-dial pairs.
Which adjustable dumbbells are best for UK homes right now?
Full detail on each of the seven, in ranked order — who each is genuinely for, who it isn't, and what UK reviewers and owners consistently say.
Best overall
NÜOBELL 2-20kg Adjustable Dumbbells
The NÜOBELL keeps a genuinely traditional dumbbell shape — short, no dial sticking out — and it's the pick current UK roundups reach for as "best overall" most consistently. UK reviewers call its twist-dial the smoothest and quietest in the category, with no rattle once locked.
For: lifters doing presses and rows where a bulky dial gets in the way, anyone used to fixed dumbbells wanting the closest adjustable equivalent, and buyers happy to pay a premium for feel over cost-per-kilogram.
Not for: tight budgets — at ~£12.48/kg it's the priciest option here — or anyone expecting to pass 20kg per hand soon. The 2-32kg pair costs £799 (currently £639), or a £239.99 upgrade kit is available later.
| Weight range | 2–20kg per hand2kg increments |
|---|---|
| Dimensions | 395 × 185 × 180mm per dumbbell |
| Warranty | 2 years |
Pros
- Smoothest, quietest dial UK reviewers report
- Traditional dumbbell shape and length
Cons
- Highest cost-per-kg in this comparison
- 20kg ceiling needs a separate purchase to go heavier
Best budget
BrainGain SmartBells 24kg Adjustable Dumbbells
BrainGain has the highest sales velocity we found in this category on Amazon UK, and it's named top budget pick in both T3's and Men's Fitness's 2026 guides. Fifteen settings from 2.5kg to 24kg per hand for under £200 is a strong spec-to-price ratio, and its cost-per-kg (£4.14) is the best of anything we compared.
For: a full weight range without spending £400+, and buyers who want two independent UK "best budget" verdicts rather than a manufacturer's own claims.
Not for: lifters who already know they'll push past 24kg per hand — BrainGain sells a separate, heavier 40kg pair at roughly double the price, with no cheap upgrade path.
| Weight range | 2.5–24kg per hand, 15 settings |
|---|---|
| Warranty | 2 years |
| Recognition | Top budget pick — T3 and Men's Fitness, 2026 |
Pros
- Best cost-per-kg of any model compared
- Two independent UK 'best budget' verdicts
Cons
- No cheap upgrade path past 24kg per hand
- Amazon UK price fluctuates — check before buying
Cheapest way in
Kayman 24kg Adjustable Dumbbell Set (2×12kg)
At £110.49 the Kayman is the lowest real entry price for a genuine quick-dial mechanism we found on Amazon UK, rated around 4.6 stars from roughly 120 reviews at the time of our research pass. The honest caveat: "24kg" is the combined pair total — each dumbbell tops out at 12kg.
For: absolute beginners, anyone trialling the adjustable format cheaply, and buyers whose current programme genuinely doesn't need more than 12kg per hand yet.
Not for: anyone who can already manage a goblet squat or bent-over row with more than 12kg per hand — a milestone most consistent beginners hit within months.
| Weight range | 2–12kg per hand2/4/6/8/10/12kg |
|---|---|
| Warranty | Extended cover on registration within 60 days |
| Owner reviews | ~4.6★ from ~120 reviewsAmazon UK, our research pass |
Pros
- Lowest real entry price for a quick-dial pair
- Strong Amazon UK review volume
Cons
- 12kg-per-hand ceiling — a real limit past beginner stage
- No upgrade path within the same product
Best for growing past 24kg
MuscleSquad 27kg Adjustable Dumbbell
MuscleSquad sells every model as a single dumbbell — £155 buys one, not a pair, so budget £310 for a matching set. You get ten settings from 2kg to 27kg (2, 5, 7.5, 10.5, 13, 16, 18.5, 21.5, 24, 27kg), plus an all-metal Elite line above it: 32kg for £225 each, or 40kg for £250 each.
One honesty note: older UK reviews, including T3's and Jay's Home Gym's, tested a 32.5kg model that's since been discontinued and restructured. The standard range now tops out at 27kg, with the heavier metal Elite line sold separately — any comparison quoting the old spec is out of date.
For: lifters who've outgrown 24kg and want a straightforward upgrade path to 32kg or 40kg without switching brands. Not for: anyone assuming the advertised price already includes a pair.
| 27kg standard | 2–27kg per hand, 10 settingsSingle — £155 each |
|---|---|
| Elite 32kg / 40kg | £225 / £250 per single, all-metal |
| Note | 32.5kg spec discontinuedOlder reviews are out of date |
Pros
- Clear upgrade path to 32kg or 40kg per hand
- All-metal Elite line, no plastic housings
Cons
- Sold as singles — pair price is double the headline figure
- 27kg standard line is a recent restructure
Established UK brand
BodyMax Selectabell Adjustable Dumbbells
BodyMax is a long-established UK fitness brand sold via Fitshop UK. The Selectabell range comes in two ceilings: 25kg per hand (15 settings, 4.5–25kg) and 34kg per hand (18 settings, 4.5–34kg). Like MuscleSquad, it sells by default as a single — the 25kg model was £169 for one when we checked, with a matching pair bundle at £304.20.
For: buyers wanting a well-known UK name, a straightforward 2-year warranty, and a pin-select mechanism rather than a dial.
Not for: anyone assuming Fitshop's price is for a pair by default — it isn't.
| 25kg model | 4.5–25kg per hand, 15 settings£169 single / £304.20 pair |
|---|---|
| 34kg model | 4.5–34kg per hand, 18 settings£229 single / ~£412.20 pair |
| Warranty | 2 years, home use |
Pros
- Established UK brand, straightforward 2-year warranty
- Choice of 25kg or 34kg ceiling in the same range
Cons
- Sold as singles by default — check pair pricing first
- Fitshop's sale pricing moves week to week
Buy carefully
Bowflex SelectTech 552i Adjustable Dumbbells
Bowflex is the most brand-searched name in this category. The current SelectTech 552i — 2kg to 24kg per hand via a dial-select tray — is widely stocked in the UK through bowflex.co.uk, Decathlon UK, Johnson Fitness UK and Fitness Superstore. RRP is £549.99, though it's frequently discounted; we found it at £337.99 at Johnson Fitness UK when we checked.
The recall, explained plainly
In June 2025, the US Consumer Product Safety Commission and Johnson Health Tech Trading recalled roughly 3.8 million original Bowflex SelectTech 552 and 1090 dumbbells sold in the US between 2004 and May 2025. The fault: weight plates could dislodge from the handle mid-use. There were 337 reports, including 111 confirmed injuries — concussions, abrasions, broken toes and contusions among them. Source: CPSC recall notice.
Johnson Health Tech, which now owns Bowflex, says it rebuilt the mechanism from the ground up afterwards, adding reinforced metal locking components as a secondary retention point alongside the dial — sold in the US as the "Results Series 552". UK retailers currently sell the ongoing "552i" model name; our research found no published bulletin explicitly confirming every 552i unit sold in the UK carries the identical redesigned mechanism, so we're presenting the manufacturer's design-fix claim as exactly that — a manufacturer claim, not an independently verified UK-specific certification.
We found no matching UK or EU recall notice (OPSS or otherwise) for the 552i, and Bowflex's UK site carries no visible recall disclosure. We are not stating UK-sold units were recalled — we found no evidence of that, and the CPSC recall is a US action. What we can say plainly: buy current stock only, and only from an authorised UK seller — bowflex.co.uk, Johnson Fitness UK, Decathlon UK, or Fitness Superstore — never unverified third-party marketplace stock.
For: buyers who specifically want the best-known name and are comfortable buying only from an authorised UK retailer with current stock.
Not for: anyone tempted by a suspiciously cheap "Bowflex 552" listing on a third-party marketplace — pricing here assumes current, authorised-seller stock.
| Weight range | 2–24kg per hand, dial-select tray |
|---|---|
| RRP | £549.99£337.99 seen at Johnson Fitness UK |
| Recall status | US recall, June 2025 — original 552/1090 onlyNo UK/EU recall notice found |
Pros
- Most recognised brand name in the category
- Widely stocked by multiple authorised UK retailers
Cons
- Recall history requires buying only current, authorised stock
- Highest RRP of the dial-mechanism models compared
Most expandable
PowerBlock Elite EXP Stage 1 Adjustable Dumbbells
PowerBlock's stacked-block shape starts at 2.3–22.7kg per hand at Stage 1 (around £450 the pair from UK specialist retail), and expands to 31.8kg with a Stage 2 kit or 40.8kg with Stage 3 — both sold separately at roughly £199 each. It's the only model here built to grow across three purchases rather than one.
For: lifters planning a multi-year progression who'd rather buy expansion kits later than replace a whole set.
Not for: budget buyers — at £9.91/kg it's the second most expensive option here. Amazon UK stock and price fluctuate, so confirm before buying.
| Weight range | 2.3–22.7kg per hand (Stage 1)1.13kg increments |
|---|---|
| Expansion | To 31.8kg or 40.8kg per handStage 2 / 3 kits, ~£199 each |
Pros
- Only model built to expand across three purchase stages
- Durable steel construction UK reviewers rate well
Cons
- High cost per kg even before expansion kits
- Amazon UK price and stock fluctuate
Do you need 24kg, 32kg or 40kg adjustable dumbbells?
The right ceiling depends on which exercises you do, not an abstract sense of how strong you want to look. A 24kg-per-hand ceiling — BrainGain, Kayman (pair total), Bowflex — covers most pressing, curling and isolation work for years, since the overhead press and bicep curl are limited by your weakest muscle group long before 24kg. It runs out fastest on compound lower-body and back moves: goblet squats, Romanian deadlifts, bent-over rows and weighted lunges.
A 32kg-per-hand ceiling — MuscleSquad Elite — buys meaningful extra years before you plateau on those bigger compound lifts, and is a sensible target for anyone training consistently for 12 months or more.
40kg adjustable dumbbells — MuscleSquad Elite's top model, or PowerBlock's Stage 3 expansion — suit intermediate-to-advanced lifters doing heavy unilateral work: single-arm rows, Bulgarian split squats, heavy step-ups. Few beginners will use a full 40 kg adjustable dumbbells set to its actual ceiling; buying that headroom upfront usually means paying for capacity you won't touch for a year or more. Unless you already know you're training toward it, a 24kg or 32kg ceiling with a clear upgrade path is the more sensible starting purchase.
Which dial mechanism should you trust?
Every mechanism here fails differently when something goes wrong, and the failure mode matters more than which feels smoothest in a showroom.
Rotating dial / collar systems (NÜOBELL, BrainGain, Kayman, MuscleSquad) generally fail safe: if the dial isn't fully turned, the handle won't lift cleanly away, because the pins haven't engaged. The risk window is narrow — mid-lift, not mid-adjustment.
Pin-select systems (BodyMax, PowerBlock) fail differently: if the pin isn't pushed fully home, plates above it can shift under load even though the dumbbell felt secure on pickup, because the failure sits in a static pin rather than a dynamic lock. Check the pin is flush before your first rep, not just before lifting off the tray.
Bowflex's dial-select tray is the mechanism implicated in the 2025 US recall — plates dislodging mid-use, not mid-adjustment, a more serious failure because it happens while the dumbbell is already loaded and moving. That's why the recall drew 111 confirmed injuries rather than near-misses caught during setup, and why we've treated the 552i's current safety status with more caution than anything else on this page.
The practical takeaway for any mechanism: test the lock with a firm downward tug before your first working rep, every session — mechanisms loosen slightly with wear, and a five-second check costs nothing.
Buying singles vs pairs — the UK pricing trap
Two of the seven brands here — MuscleSquad and BodyMax — list their headline price for one dumbbell, not a pair, while NÜOBELL, BrainGain, Kayman and Bowflex price by the pair upfront. That's clearly stated on the product page, but it means a direct price comparison across a search results page can look far more favourable to a singles-priced brand than it actually is once you've bought two.
The practical check before you buy: does this price get you two dumbbells you can train with, or one? A "cheap" £155 dumbbell needing a second £155 purchase isn't cheaper than a £199 pair listing — it's £11 more, and that gap only shows up once you've added the second one to your basket.
Cheaper and dearer alternatives
Cheaper than anything here: a basic set of fixed rubber hex dumbbells in two or three weights will always beat any adjustable system on pure cost-per-kilogram, at the price of needing more storage and buying replacement pairs as you get stronger. Adjustable mechanisms are a space-and-convenience premium, not a cost saving.
Dearer than anything here: NÜOBELL's 2-32kg pair (£799 RRP, currently £639) extends the smoothest mechanism in this comparison to a 32kg-per-hand ceiling without switching brands, and BrainGain's 40kg pair roughly doubles the 24kg model's price for double the ceiling. Either is a reasonable next step if £500–£800 is genuinely within budget and you'll use the extra headroom.
What we plan to test hands-on next
We intend to buy the NÜOBELL 2-20kg and BrainGain SmartBells 24kg pairs at full retail price for hands-on testing under Test Bench v1.0 — measuring dial engagement under load, drop tolerance, noise on a hard floor, and real assembled dimensions. When that's done, this page will be updated with measured scores and the research-only sections above will be marked as superseded. We don't accept free samples in exchange for coverage, so this depends on our own purchasing schedule, not manufacturer availability.
Frequently asked questions
Are adjustable dumbbells worth it?
Usually, if floor space is limited. One pair replacing four to six fixed sets earns its cost back against buying that many pairs, and stores in far less room. Cost per kilogram varies a lot though: quick-dial budget sets run around £4–5/kg, while premium traditional-shaped models like the NÜOBELL cost closer to £12/kg — you're paying for shape and smoothness, not just metal.
How do adjustable dumbbells work?
Most use a rotating dial or collar (NÜOBELL, BrainGain, Kayman, MuscleSquad): twist it and internal pins lock onto a stack of plates, releasing the rest onto a tray. Others use a pin-select system (BodyMax, PowerBlock): pull a metal pin, slide it to your chosen weight, push it back in. Bowflex's dial moves a selector plate through a tray of weights — a related but distinct mechanism.
What weight adjustable dumbbells should a beginner buy?
Most UK beginners outgrow a 12kg-per-hand ceiling within months, especially for squats and rows. Unless budget is the deciding factor, a 24kg-per-hand set — BrainGain or Bowflex — gives more headroom before you need to upgrade. If £110 is the hard limit, the Kayman's 12kg ceiling is a fine, cheap starting point.
Are adjustable dumbbells safe?
The mechanism matters more than the brand. Dial and pin systems that fully engage before you lift are safe in normal use; the risk is a plate not fully seating and dislodging mid-rep — exactly what triggered the June 2025 US recall of the original Bowflex SelectTech 552 and 1090. Always check for a full click or lock before lifting, and stop using any unit where the dial feels loose.
Can you drop adjustable dumbbells?
No. Every mechanism here relies on a precise fit between plates and handle; dropping one from height can bend rails, crack housings or knock a lock out of alignment, and several manufacturers say this voids the warranty outright. If your training involves real drop risk — dead-stop deadlifts, failed reps — fixed rubber-coated dumbbells are the safer choice.
Is the Bowflex SelectTech 552i safe to buy in the UK?
We found no UK or EU recall notice for the 552i. The current unit is described by Johnson Health Tech as a redesign with reinforced metal components, built after the 2025 US recall of the original 552 and 1090 — but we couldn't independently confirm every UK 552i matches that exact US 'Results Series' spec. Treat it as a manufacturer claim, and buy only current stock from an authorised UK seller.
Should I buy adjustable dumbbells as a single or a pair?
Check the listing before checkout. MuscleSquad and BodyMax price by the single dumbbell by default, while NÜOBELL, BrainGain, Kayman and Bowflex price by the pair. Buying two singles is rarely cheaper than a bundled pair, so an unusually low price on this page might be for half a set.
Update log
First published. Research-based comparison of seven adjustable dumbbells with UK pricing checked live; no hands-on testing has taken place yet.