The Short Answer
If you want the best adjustable dumbbell you can buy in the UK right now, it's the Nuobell 232 (£499). It changes weight faster than anything else, feels like a fixed dumbbell in your hand, and replaces 16 pairs of traditional weights. But it's not for everyone — if you drop your weights during workouts or have a sub-£300 budget, the BrainGain SmartBells 24kg (£189.99) give you 80% of the experience for under £200. Serious powerlifters who need bomb-proof durability should look at the PowerBlock Pro 50 (£349).
1. Cost & Price: What You'll Actually Pay in July 2026
Adjustable dumbbells aren't cheap — but neither is a full rack of fixed weights. Here's what the five most popular models cost in the UK right now, ranked cheapest to priciest:
| Product | Price (Pair) | Weight Range | Increments | Pence per kg |
|---|---|---|---|---|
| BrainGain SmartBells 24kg | £189.99 | 2.5 – 24 kg | 2.5 kg | £3.96 |
| MuscleSquad Quick Select 32.5kg | £220 | 5 – 32.5 kg | 2.5 kg | £3.38 |
| Bowflex SelectTech 552i | £349 – £399 | 2 – 24 kg | Variable* | £7.27 – £8.31 |
| PowerBlock Pro 50 | £349 | 2.5 – 22.8 kg | 1.1 kg (micro-load) | £7.65 |
| Nuobell 232 | £499 | 2 – 32 kg | 2 kg | £7.80 |
* Bowflex uses uneven jumps: 2, 3, 4, 5.5, 7, 9, 10.5, 12, 14, 15.5, 16.5, 18, 20, 21.5, 24 kg. The first 10 kg uses 1.5–2 kg steps; beyond that, they get larger.
The hidden cost: three of these (Nuobell, MuscleSquad, BrainGain) come as a pair. Bowflex and PowerBlock are sometimes sold as singles — always check whether you're buying one or two before clicking "buy." A Bowflex "pair" listing at £349 is a good deal; two singles at £199 each is £398.
If you're buying on a credit card or Klarna (as roughly 40% of UK home gym buyers now do, according to retailer data), the price difference between the cheapest and most expensive option is about £26/month over 12 months. That's the cost of one takeaway. Worth thinking about if you'll use these 3–4 times a week for years.
2. Problems & Drawbacks: What Nobody Tells You
Every adjustable dumbbell has at least one thing that sucks. Reddit's r/GarageGym and r/homegym are littered with posts from people who spent £400 and regret their choice. Here's what goes wrong with each model:
Bowflex 552i — Fragile When Dropped
The dial mechanism is mostly plastic. Drop it from waist height onto a hard floor and the weight-selection tabs can snap — there are multiple Reddit threads about this. Bowflex warns you not to drop them in the manual, but let's be honest: when you're failing on rep 8 of a heavy press, you're not thinking about the warranty. Who should avoid: anyone who trains to failure alone, CrossFitters, or anyone without rubber gym flooring.
Nuobell 232 — Plastic Internals, Expensive
The Nuobell feels premium on the outside but the internal adjustment mechanism relies on plastic tabs that can wear down over 2–3 years of heavy use. At £499, you're paying a £150 premium over the Bowflex for a sleeker look and faster changes — but not necessarily more durability. There's also no UK service centre; warranty claims go through the retailer. Who should avoid: budget-conscious buyers, anyone who treats their equipment roughly, or people who want a 10-year buy.
PowerBlock Pro 50 — Awkward Cage Design
PowerBlocks are tanks. They'll survive being thrown. But the cage design means your hand sits inside a rectangular metal box — lateral raises, pullovers, and any exercise where your wrist needs to rotate feel weird. The adder-weight system (small cylindrical weights you manually insert) creates an imbalance at certain weight settings, which is the single biggest complaint on Reddit. Who should avoid: anyone doing isolation work, yoga sculpt, or exercises requiring wrist mobility.
MuscleSquad Quick Select — Slow Changes
At £220, it's great value. But the threaded-collar adjustment means changing weight takes 20–30 seconds per dumbbell versus 3 seconds on a Nuobell or Bowflex. If you do drop sets, supersets, or HIIT-style workouts, those delays add up and kill your momentum. The plates also rattle slightly at lower weight settings. Who should avoid: anyone doing fast-paced workouts, drop sets, or circuit training.
BrainGain SmartBells 24kg — Max Weight Ceiling
24 kg per dumbbell is enough for most isolation exercises, but if you're pressing or rowing anywhere near your bodyweight, you'll outgrow these within 6–12 months. The build quality is solid for the price, but the dial isn't as smooth as the Bowflex and occasionally sticks between increments. Who should avoid: intermediate-to-advanced lifters, anyone benching over 70 kg, or anyone who plans to get significantly stronger.
3. Head-to-Head Comparison
| Feature | Bowflex 552i | Nuobell 232 | PowerBlock Pro 50 | MuscleSquad QS | BrainGain SB |
|---|---|---|---|---|---|
| Max weight | 24 kg | 32 kg | 22.8 kg | 32.5 kg | 24 kg |
| Change speed | ~3 sec | ~2 sec | ~5 sec | ~25 sec | ~4 sec |
| Increments | Variable | 2 kg | 1.1 kg | 2.5 kg | 2.5 kg |
| Feel in hand | Good (rubber grip) | Excellent (knurled) | Boxy | Good | Good |
| Durability | Medium | Medium | Excellent | Good | Good |
| Drop-safe | No | No | Yes | Partially | No |
| Price (pair) | £349–399 | £499 | £349 | £220 | £189.99 |
| Warranty | 2 years | 2 years | 5 years | 1 year | 1 year |
The Nuobell cleans up on performance (speed, feel, max weight). PowerBlock wins on durability and warranty. BrainGain and MuscleSquad split the value crown. The Bowflex sits in the middle — not the best at anything, but not terrible at anything either.
4. Who Each Product Is For
Nuobell 232 — Best Overall
Buy if: you want the closest thing to a fixed-dumbbell experience in a space-saving package. The knurled handle, fast changes, and 32 kg max make this the one you'll still enjoy using in 3 years. Avoid if: you've got a £300 max budget, you regularly drop weights, or you'd rather have bomb-proof durability over premium feel. View on Amazon · Find on eBay
Bowflex SelectTech 552i — Best All-Rounder
Buy if: you want the most well-known adjustable dumbbell and don't mind paying the brand premium. The dial system is intuitive, the weight range covers most home workouts, and availability is excellent. Avoid if: you ever drop weights, or you're bothered by plastic components on a £350+ product. View on Amazon · Find on eBay
PowerBlock Pro 50 — Best for Serious Lifters
Buy if: durability is your number one priority and you're willing to adapt to the unusual grip. The 5-year warranty and micro-load increments (1.1 kg steps) make this the choice for progressive overload purists. Avoid if: you do isolation work that needs wrist rotation, or you just can't get past the odd cage shape. View on Amazon · Find on eBay
MuscleSquad Quick Select 32.5kg — Best Value for Heavy Lifters
Buy if: you need the highest max weight at the lowest price. 32.5 kg per dumbbell for £220 is unbeatable on paper. The build is solid and the threaded collar won't break. Avoid if: your workouts are fast-paced — the 25-second change time between weights will frustrate you. View on Amazon · Find on eBay
BrainGain SmartBells 24kg — Best Budget Pick
Buy if: you're building a home gym on a budget and don't need more than 24 kg per hand. At £189.99, these do 80% of what the Bowflex does for just over half the price. Avoid if: you're already pressing over 24 kg or plan to get stronger quickly — you'll outgrow these. View on Amazon · Find on eBay
5. Best in Class Verdict
Winner: Nuobell 232 — 9.0/10
The Nuobell 232 is the adjustable dumbbell that makes you forget you're using adjustables. The knurled handle, 2-second weight changes, and 32 kg ceiling put it in a different league from everything else tested. Yes, it's £499. Yes, the internals are plastic — that's the trade-off. But for the 95% of home gym users who don't drop their weights, the experience is worth the premium. If I could only own one set of dumbbells for the rest of my life, it would be these.
Runner-up: Bowflex SelectTech 552i — 8.2/10
The Bowflex is the safe choice. It's been around for over a decade, the dial mechanism works, and at £349 for a pair it hits the sweet spot between price and performance. It's not the best at anything, but it's the second-best at nearly everything — and it's available everywhere. If the Nuobell feels like too much of a gamble, the Bowflex won't let you down.
Sources & Evidence
This article is based on real data, not marketing claims:
- Prices verified against Amazon UK, Fitshop, Bells of Steel UK, Sweatband, and PowerBlock UK direct listings (July 2026)
- User complaints sourced from Reddit threads on r/GarageGym, r/homegym, r/homefitness, and r/Bowflex (2025–2026)
- Specifications cross-referenced against manufacturer datasheets and Men's Health UK / Women's Health UK / T3 / Men's Fitness UK reviews
- Bowflex 552i recall information from the Bowflex subreddit and CPSC database (1090i model recall, November 2025)
- PowerBlock Pro 50 adder-weight imbalance concern verified across multiple independent Reddit reviews
- Nuobell internal component analysis from YouTube teardown videos (Garage Gym Reviews, 2025)
FAQ: Adjustable Dumbbells UK
Are adjustable dumbbells worth it in the UK?
Yes — if you'll use them. A full set of fixed dumbbells from 2.5 kg to 30 kg costs £600–£900 and takes up an entire wall. One pair of adjustable dumbbells replaces all of that for £190–£500 and fits in a corner. The catch: you can't superset different weights without changing them mid-workout. If you do a lot of drop sets or circuit training, fixed weights might actually suit you better.
Can I drop adjustable dumbbells?
Generally, no. The only model here rated as genuinely drop-safe is the PowerBlock Pro 50, thanks to its welded steel cage. Bowflex explicitly warns against dropping in the manual — the plastic adjustment tabs can snap. Nuobell's plastic internal mechanism can also break. If you train to failure on presses without a spotter, invest in good rubber flooring (£30–50 for a mat) and learn to set the weights down rather than dropping them.
What's the difference between Bowflex 552 and 552i?
The 552i is the current (2024+) revision with an improved dial, better grip texture, and compatibility with the JRNY app for guided workouts. The original 552 (discontinued) had a slightly stiffer dial and no Bluetooth. If you're buying used, make sure you're getting the 552i — the original 552 spare parts are no longer available in the UK.
Do I need a stand for adjustable dumbbells?
Not strictly — but you'll want one if you're over 35 or value your lower back. Picking up 24–32 kg from the floor between every set gets old fast. A stand raises the dumbbells to roughly waist height so you can swap weights and start your set without bending down. Expect to spend £50–£120 for a compatible stand. The Nuobell stand is £159, the Bowflex stand is around £80–£100.
