BowFlex SelectTech 552 vs PowerBlock Elite 2026

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The BowFlex SelectTech 552 was the adjustable dumbbell everyone recommended for a decade. Fast weight changes, small footprint, a well-known brand. Then in June 2025, the CPSC recalled 3.8 million units after weight plates started detaching mid-lift. The 552 is no longer a safe recommendation in its unrepaired state, and the replacement model is not widely available on Amazon UK.

I earn a small commission if you buy through links on this page -- it doesn't change what I recommend or the price you pay.

The PowerBlock Elite EXP is what I'd recommend instead. It handles more weight, lasts longer, and is available on Amazon UK at around £450. Read on for the full breakdown.

## What Happened to the BowFlex SelectTech 552

In June 2025, BowFlex's parent company Nautilus recalled approximately 3.8 million SelectTech 552 and 1090 adjustable dumbbells following reports of weight plates detaching during exercise. The CPSC investigation found that the twist-dial selector mechanism could fail under load, releasing individual weight plates during a lift.

If you already own a 552, BowFlex has offered a free repair kit through their website. Once the repair is applied, BowFlex states the dumbbells are safe to use again. If you haven't applied the repair, the CPSC guidance is to stop using them immediately.

BowFlex has since introduced the 552 Results Series as the updated replacement. The Results Series addresses the plate-retention issue with a redesigned locking mechanism. However, as of mid-2026, it sells primarily through bowflex.com and is not readily available on Amazon UK. If you're in the US, it's worth checking -- US availability through major retailers has improved.

For anyone buying new in the UK, PowerBlock is the practical answer.

## The BowFlex SelectTech 552: What It Was

Before the recall, the 552 had earned its reputation. The twist-dial system was genuinely fast -- two seconds to change weight, a satisfying click, a compact tray footprint. It ran from 2 kg to 24 kg in 2.5 kg increments, giving 15 weight settings in a package the size of a single dumbbell pair.

Where it worked well. Isolation work benefited from the fine increments. Lateral raises, tricep extensions, bicep curls -- exercises where the difference between 10 kg and 12.5 kg actually matters. The 24 kg maximum was enough for most beginners and intermediate lifters focused on upper body work.

Where it had limits. The 24 kg ceiling became a problem for compound lifts. Goblet squats, Romanian deadlifts, and bent-over rows quickly outgrow that weight as strength develops. The mechanism was also designed specifically to be placed back in the tray -- dropping, or even setting down carelessly, could crack the selector housing. Owners report the dials becoming stiff and harder to turn over time, particularly with heavy use or gym chalk contact.

The recall context. The plate-detachment failures appear to have been concentrated in older units, though BowFlex's recall covered all models up to the June 2025 manufacturing date. The most serious incidents involved plates coming free during overhead or pressing movements -- which makes the failure mode particularly risky.

The 552 is not a bad design in principle. The Results Series addresses the root cause. But the original unrepaired unit is off the table for any new purchase.

## The PowerBlock Elite EXP: What It Is

The PowerBlock Elite EXP uses a different selector system entirely. Instead of a twist dial, you move a pin into slots in a selector block. The dumbbells are built on a steel frame -- each weight increment is a nested sleeve rather than a loose plate, which is why they handle drops better than selectorised competitors.

PowerBlock Elite EXP *(around £450 | View on Amazon)*

Weight range. The base set runs from 2.3 kg to 22.7 kg per hand -- roughly equivalent to the 552's top end. But the EXP is expandable: add-on kits (sold separately) take it to 29.5 kg, then to 41 kg. This means the set grows with you. Lifters who are currently pressing 20 kg but expect to progress to 35 kg over two years don't need to replace the whole set.

Build quality. The steel sleeve-within-sleeve construction is meaningfully more robust than the 552's twist-dial housing. PowerBlock backs this with a 5-year warranty -- which says something about how they expect the product to hold up. User reports across r/homegym consistently reference sets running for 8-10 years with no mechanism failures.

The shape. The boxy, compact profile divides opinion. Compared to the 552's more familiar dumbbell silhouette, the PowerBlock feels slightly different in the hand -- the balance point is more central, and the grip sits between two sleeve layers rather than on a classic knurled handle. Most users adapt within a few sessions. For pressing and rowing movements, the difference is negligible. For curl movements where wrist rotation matters, some lifters prefer a more traditional shape.

Weight changes. The pin system is slightly slower than the 552's dial -- 5-8 seconds rather than 2-3 seconds. In practice, this rarely matters in training. You're not changing weight in a 30-second rest window; you're typically resting longer than that between sets.

Footprint. The PowerBlock takes up roughly 40% less tray space than a comparable fixed dumbbell rack. Two trays side by side fit comfortably in a space 80 cm wide -- a bedroom corner, a garage shelf, under a bench.

## Head-to-Head: Key Dimensions

The 552's advantage was feel and brand familiarity. The PowerBlock wins on every functional dimension.

## Who the BowFlex 552 Was Built For

Understanding the original market for the 552 explains why it dominated recommendations for so long. It was designed for the home gym beginner who wanted a step up from fixed dumbbells without committing to a full rack. The price point (around £300 when widely available) landed it squarely between cheap spinlock sets and the more expensive PowerBlock.

The dial system was genuinely user-friendly. You could hand it to someone who had never used adjustable dumbbells and they would figure it out inside 30 seconds. The lever simply turned to a number; the weight locked in. No pins to fumble, no adapter collars to align. For circuit training or HIIT sessions where weight changes happen frequently, this mattered.

The 24 kg ceiling told you exactly who BowFlex was targeting: people doing bodyweight-adjacent training with dumbbells, not powerlifters. Upper body conditioning, functional fitness, home cardio routines, rehab-style movements. For that audience, the 552 delivered.

The recall exposed a flaw in the manufacturing that BowFlex's testing had not caught at scale. The twist-dial mechanism -- under repeated loading and unloading across years of use -- could develop micro-play in the plate locking tabs. Heavy lifters who loaded the 552 to its maximum and performed explosive movements (like dumbbell snatches or heavy Romanian deadlifts) appear to have been more likely to trigger the failure mode. Lighter users doing controlled isolation work may have owned their 552 for years without ever encountering the issue.

That context doesn't rehabilitate the original unit for new purchase. But it explains why the recall caught many owners by surprise: the 552 often felt completely solid right up until it wasn't.

## How PowerBlock Arrived at This Design

PowerBlock's selector approach goes back to the company's founding in the early 1990s. The original design used a nested-sleeve principle where each weight increment sits inside the next, and a single pin engages at the desired position. This is fundamentally different from the BowFlex approach (loose plates locked by a tab) and from spinlock sets (plates physically threaded onto a bar).

The nested-sleeve design has one key structural advantage: there are no loose components. When you remove the PowerBlock from the tray, every weight below your selected setting stays locked in the nested configuration. Nothing slides or rattles. The only moving part in the selector is the pin itself -- which is a simple steel rod with no spring-loaded mechanism or rotational plastic components.

This is why PowerBlock can credibly claim moderate drop-tolerance. The structure doesn't rely on a fragile locking mechanism holding plates in tension against gravity. The nested sleeves are concentric -- when you drop the dumbbell, the impact distributes through the frame rather than through a locking tab assembly.

The trade-off is incremental flexibility. The PowerBlock EXP adjusts in 2.27 kg (5 lb) increments rather than the 552's 2.5 kg steps. For most users this is irrelevant. For those doing fine-tuned isolation work where the difference between 10 kg and 12.5 kg is meaningful, the gap is comparable.

PowerBlock has also stayed committed to expandability as a core design principle. The add-on kits (Stage 2 takes the set to 29.5 kg, Stage 3 to 41 kg) are genuinely available, genuinely compatible, and have been for years. This is not theoretical expandability -- r/homegym is full of multi-year owners who purchased Stage 2 and Stage 3 kits without issue.

## The UK Market Reality

The BowFlex 552 was never as dominant in the UK as in the US. American gym culture, Amazon.com's depth of stock, and the scale of BowFlex's US distribution meant the 552 was ubiquitous stateside. In the UK, the supply chain was thinner -- BowFlex products were imported rather than locally distributed, and the price reflected that with a consistent premium over the US retail price.

The recall made this asymmetry more pronounced. In the US, BowFlex set up dedicated recall repair channels, organised retail collection points, and launched the Results Series through major chains within months. In the UK, the process was slower. Many UK owners found themselves navigating international warranty processes with longer wait times for repair kits.

The Results Series -- BowFlex's fixed replacement -- is available in the UK through bowflex.com direct, but without the Amazon UK listing that made the original 552 convenient for UK buyers. Checking current availability before ruling it out entirely is sensible, as stock does appear intermittently through UK distributors. But for anyone wanting next-day delivery through Amazon UK, PowerBlock is the practical answer right now.

MuscleSquad is worth a proper mention here. They're a UK-based brand with UK warehousing, UK customer service, and Amazon UK fulfilment. The MuscleSquad 32.5 kg adjustable set has become the default recommendation for budget-conscious UK buyers since the 552 recall, and for good reason. The mechanism is a dial-selector (similar in principle to the BowFlex, though not identical), but the build quality is solid and the 32.5 kg maximum covers a wider range of lifters than the 552's 24 kg ceiling.

MuscleSquad 32.5kg Adjustable Dumbbells *(around £200 | View on Amazon)*

For UK buyers on a tight budget, MuscleSquad is a serious alternative worth considering alongside PowerBlock. The gap between a £200 MuscleSquad set and a £450 PowerBlock is substantial -- that £250 difference funds a significant amount of other kit.

## The Shape Question: Who Finds the PowerBlock Awkward

The most common PowerBlock criticism is the shape. It's worth addressing this directly rather than dismissing it.

The PowerBlock is a compact rectangular block. The handle runs through the middle of nested weight sleeves. The weight distribution is centred — the mass sits close to your grip rather than extending out to either side the way a traditional dumbbell does. For most exercises, this is neutral or even advantageous: rows, presses, goblet squats, and RDLs work just as naturally with a PowerBlock as with a conventional dumbbell.

Where the shape matters is in curl variations. Traditional dumbbells allow you to supinate the wrist through the curl range of motion — to rotate your forearm inward at the bottom and outward at the top. The dumbbell's shape gives you a natural cue for that rotation. The PowerBlock's compact format provides less of that rotational cue. The handle doesn't extend beyond the weight mass in the way a standard handle does. Most people adapt within a few sessions. Some lifters who specifically focus on bicep work and care about that supination pattern find the feel slightly less natural.

The solution some PowerBlock owners use: a set of 10-15 kg fixed dumbbells alongside the PowerBlock for curl work, using the PowerBlock for all compound and heavier isolation movements. At £20-30 a pair, fixed dumbbells for one exercise range isn't an expensive workaround.

The other shape consideration is lying exercises. When pressing on a flat bench with a PowerBlock, the compact width means the dumbbell sits slightly differently in the palm at the start position compared to a conventional dumbbell. Again, most people adapt. But lifters who have pressed with conventional dumbbells for years sometimes report a brief adjustment period before the pressing groove feels natural.

None of this is a dealbreaker. The PowerBlock shape is a different feel, not an inferior one. But if you're deciding between the PowerBlock and a budget alternative with a more traditional profile, the shape factor is worth testing in person if you can.

## Who the PowerBlock Is Not Right For

The PowerBlock is the correct answer for most people in this comparison, but not everyone.

You do heavy Olympic-style lifts. Dumbbell snatches, push presses, or any movement where you let the weight drop at the end of a rep. PowerBlock specifies no dropping. Fixed dumbbells or a specialised adjustable with drop tolerance is better here.

You want to use just one weight for years and don't expect to progress. If you genuinely only need a single weight for light rehabilitation work or stretching assists, a fixed dumbbell costs £10-15 and lasts indefinitely. The PowerBlock's expandability is wasted.

You're building a commercial gym or need multiple weight stations. The PowerBlock is a home gym solution. For multiple users needing different weights simultaneously, a traditional rack is more practical.

The £450 doesn't fit the budget and you genuinely can only spend £150-200. The MuscleSquad 32.5 kg set is the right answer at that price point. Don't stretch to a PowerBlock if it means compromising somewhere else in your setup.

## Training With Adjustable Dumbbells: Getting the Most Out of Either

One point that doesn't get enough emphasis in dumbbell comparisons: the mechanism only matters as much as your training programming. An adjustable dumbbell set is a tool, and the quality of the output depends more on what you do with it than which brand sits in the tray.

The typical home gym user who asks about the 552 vs PowerBlock comparison is doing one of a few things: building a first home gym, replacing equipment post-lockdown, or upgrading from a pair of fixed dumbbells. For all three use cases, the principle is the same -- buy a set that covers your current range plus meaningful headroom.

Current range plus headroom. If you're currently pressing 16 kg dumbbells, buy a set that goes to at least 24 kg. If you're deadlifting 20 kg per hand, buy a set that goes to at least 32 kg. Don't buy to your current maximum -- buy to where you expect to be in 18 months of consistent training.

Three sessions per week is enough. Home gym training with dumbbells doesn't require complex programming. Three sessions per week, compound movements first (press, row, squat variation), isolation work second (curls, raises, tricep work), is sufficient to see meaningful progress. The dumbbell set you pick doesn't change this calculus -- both the PowerBlock and the 552 (repaired) support this kind of training equally well.

Internal links: For a broader look at building around dumbbells, the best adjustable dumbbells guide covers five sets at different price points. The kettlebell vs dumbbell comparison is worth reading if you're deciding whether to add a kettlebell to a dumbbell setup rather than buying a larger dumbbell set.

## Use Case Matching

You're starting a home gym and want one set of dumbbells to last years. Buy the PowerBlock Elite EXP. The base set covers beginner to intermediate weights. The expansion kits mean you don't hit a ceiling when strength progresses. The 5-year warranty and robust construction mean you won't be replacing them.

You train primarily isolation exercises (curls, lateral raises, tricep work) and won't go heavy. The PowerBlock still wins, but a MuscleSquad 32.5 kg set at around £200 is worth considering. If you genuinely never need more than 20 kg and price matters, MuscleSquad delivers the value.

You found a recalled 552 secondhand and want to know if it's safe. Check whether the seller has applied the BowFlex repair kit -- BowFlex sent these out for free to registered owners. If the repair is applied and documented, the set is considered safe to use. If not, factor the risk into the price.

You want the BowFlex Results Series specifically. It's a legitimate product with a fixed mechanism. Check bowflex.com for UK availability. If it's available and the price is competitive, it's worth considering. Just verify you're buying the Results Series, not old 552 stock.

You do compound lifts (rows, presses, squats) and expect to progress past 25 kg. PowerBlock with expansion kits is the only adjustable dumbbell set in this price bracket that grows with you to 41 kg. Everything else requires buying a whole new set.

## The Honest Case Against Each

Against the BowFlex 552 (original). The recall makes it a non-starter for new purchases in the UK. Even repaired units carry some residual concern for buyers who don't know the repair history. The Results Series fixes the mechanism, but the brand's confidence took a hit. For buyers who were considering the 552 based on older recommendations, the situation has materially changed.

Against the PowerBlock Elite EXP. The shape is polarising. Lifters who want the feel of a traditional dumbbell -- the long handle, the weight distribution, the ability to spin the handle freely on curls -- may find the PowerBlock's compact block format less natural. The adjustment pin can occasionally require a firm push if chalk or debris gets into the slots. And at around £450, it's not cheap: if you genuinely only need one weight (say, a single 16 kg dumbbell for swings), a fixed dumbbell costs a fraction of that.

## What to Avoid

Unrepaired BowFlex SelectTech 552 units. Do not buy an original 552 without confirmed evidence that the CPSC repair kit has been applied. The plate-detachment failure mode is a genuine injury risk, not a minor defect.

Cheap no-brand selectorised dumbbells. Platforms like Temu and some Amazon marketplace sellers stock adjustable dumbbells with selector mechanisms that look similar to the BowFlex but use far lower-grade materials. The failure modes on these are unpredictable, and returns can be difficult. Stick to brands with warranty support.

Sets with a 20 kg hard ceiling if you're already intermediate. Several budget adjustable sets top out at 20 kg per hand. If you're already pressing 18 kg on dumbbells, you'll outgrow those within months. Size up from the start.

## What I'd Buy Today

The PowerBlock Elite EXP is the straightforward answer for anyone who would have bought a BowFlex 552. It is more durable, expandable to weights the 552 never reached, and available in the UK right now.

Get the PowerBlock Elite EXP on Amazon

If budget is tight, the MuscleSquad 32.5 kg set at around £200 is a UK-made alternative worth serious consideration.

The adjustable dumbbell market moved on from the BowFlex 552. The PowerBlock moved with it. Time to pick up something that works.

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