7 Best Adjustable Kettlebells For 2026: Freak Athlete, Bells of Steel, REP Tested

What I like

• Owners who train on competition bells say the weight sits high in the body, like a fixed bell, so swing timing carries straight over.
• The contoured shell sits flat on the forearm in the rack. Cleans and presses feel far closer to a comp bell than on the PowerBlock or Bowflex.

What I don’t

• You’ll hear the loose plates on swings and snatches. It doesn’t change anything, but some lifters hate the noise.
• The pin magnet is weak. A rubber washer leaves an air gap, so the pin grips less firmly than it should.
• One owner found pins on the plates loose on delivery. They screwed straight back in, but check every plate before your first heavy set.

Pros

• Under-5-second pin change - no tools, so you swap weight between exercises instead of avoiding it.
• 12 to 32 kg in one bell - replaces 11 fixed bells. No REP size goes past 24 kg.
• Lifetime warranty - joint-longest here, though drop damage isn’t covered.
• 30-day free returns - no restocking fee if it doesn’t suit you.

Cons

• Joint-highest price - level with the heavy PowerBlock, though 11 bells still make it cheaper per bell than the REP 24kg.
• Pre-order only - each batch sells out and the ship date moves back.
• Small weight markings - hard to read in a dim garage.

Freak Athlete adjustable kettlebell review: what owners report

One bell that swaps load between sets without breaking your rhythm.

Its real rival isn’t another adjustable. It’s a rack of fixed bells. Eleven cast iron kettlebells from 12 to 32 kg cost more, eat a corner of the room and bow a shelf. The Freak folds all of that into one footprint and one pin pull.

Know how the pin works before you buy. You pull a magnetic pin, the plates you don’t want stay in the cradle, and the pin slides home carrying only the weight you picked. The unselected plates sit loose in the shell, which is where the swing rattle comes from.

Mechanism, not defect.

Ten machine-cut plates make up the 11 weights. Fully loaded, the bell measures 229 by 180 by 302 mm, and the 206 mm wide handle leaves room for two hands on swings. Few home lifters outgrow 32 kg.

It comes in one finish: black powder coat with an orange FA logo. The weight numbers are small, so a paint marker on the settings you use most saves squinting.

Demand is the other catch. When we checked on October 19, 2026, it was selling in pre-order batches, and new orders were due to ship in mid-November. Returns are free for 30 days with no restocking fee, so the wait is the only real risk.

Next to the REP 24kg, you pay more up front and wait longer. In return you start 4 kg lighter, finish 8 kg heavier, pay less per bell and get a lifetime warranty.

It tops our overall score:

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Freak Athlete is the top-rated adjustable kettlebell for 3 main reasons:

1. Fastest change here - a sub-5-second pin with no tools.

2. 12 to 32 kg in one bell - it replaces 11 fixed bells in one purchase.

3. Build and warranty back the price - all cast iron, a lifetime warranty, and the best-scoring bell in our test.

If you’d rather spend less up front and have a bell this week, the REP 24kg has a longer owner track record, though it scores ten points lower.

Freak Athlete might be for you if… you want the widest range in one bell and change weight several times a session.

It’s not for you if… budget is tight (the REP 24kg costs less up front), you can’t stand any rattle (the Bells of Steel locks silent), or you need to start under 12 kg (the Bowflex 840 starts at 8 lb).

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Where it shines

• Nothing creaks or flexes on a heavy swing, and the locking screw sits clear of the grip.
• The bell grows as you load it, from 7.75 inches tall empty to 13.75 inches at 80 lb, so the swing path shifts as the weight climbs.

Where it falls short

• The locking screw needs to bed in. After assembly it takes a few turns to seat, so cycle it through a warm-up before you trust it on a heavy set.
• A plate stack sits differently on the forearm than a cast shell, and cleans feel it.

Pros

• 80 lb ceiling - the heaviest here apart from the plate-loaded Titan.
• 2.5 lb increments - finer than REP’s 2 kg (4.4 lb) and PowerBlock’s 4 lb.
• Shares Ironmaster dumbbell plates - one plate set covers both tools.
• All iron and steel - no plastic in the load path.

Cons

• 22.5 lb minimum - too heavy for absolute beginners on this handle.
• Fresh-start cost is high - adding the plates takes the total past a Freak Athlete.
• 80 lb needs Ironmaster’s add-on kit, because the standard screws stop at 57.5 lb.

A brilliant buy for one person: the lifter who already owns Ironmaster dumbbells.

Steve, our certified personal trainer, has coached clients on Ironmaster kit for years. His take is blunt: if your plates already say Ironmaster, this is the cheapest way to add a kettlebell to that set. Starting from scratch, the same handle drags a full plate set behind it, and the total runs past a Freak Athlete.

Range is why it’s our most versatile pick. On the standard screws it runs 22.5 to 57.5 lb, and the add-on kit takes it to 80 lb. That’s 24 settings in one handle. Only the plate-loaded Titan goes heavier, and the Titan feels far less like a bell.

A change takes 15 to 20 seconds: spin the screw off, slide plates on or off, spin it back. That’s slower than a dial and far quicker than an Allen key.

Two things it can’t do.

It won’t feel like a competition bell overhead, because a plate stack balances differently from a cast shell. And at 22.5 lb empty, the scored handle is too heavy for a true beginner, who should look at the Bowflex 840 or Ironmaster’s lighter handle.

On range, only the Freak edges it:

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Ironmaster Quick-Lock might be for you if… you already own Ironmaster dumbbells, you need more than 70 lb, or you hate plastic and rattle.

It’s not for you if… you’re starting from scratch (the Freak Athlete costs less all-in) or you want true competition feel (the Bells of Steel is closer).

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The wins

• Mine has been in the garage around 9 months. The only damage is chipped paint on the base, and the locking nut still clamps solid at every weight.
• It never rattles. Swings and snatches feel exactly like a fixed comp bell, and mine has survived a couple of dropped reps.

The downsides

• I lost the Allen key three times in the first month, then glued a spare to the underside of my bench. Sort that on day one.
• Paint went first on the biggest plate, within four months. The iron underneath is fine.
• Changes take long enough that I plan each session around one load.

Pros

• Steel shell - the toughest build here, with the best drop score.
• 0.5 kg increments - micro-load presses and get-ups by about 1 lb at a time.
• Same size at every weight - 11 inches tall and 8.25 inches wide whatever’s loaded, so your swing path never changes.
• Lifetime shell warranty - the steel shell is covered for as long as you own it.
• Top value score - 18 bells in the base set make it the cheapest per bell of the self-contained bells.

Cons

• Allen-key change - 1 to 2 minutes a swap, which rules out circuits and HIIT.
• 32 kg costs extra - buy the 12-32 kg bundle up front, or the expansion kit later.

Buy this when “it’ll outlive me” matters more to you than “it’s fast.”

The decision is speed against permanence. The Freak Athlete is quicker in every way that shows up mid-workout. The Bells of Steel feels more like a fixed bell than anything else here, with a shell that never changes size as you add plates.

Those half-kilo steps are the secret weapon. Most lifters stall on the kettlebell press at the 16 to 18 kg jump, and here you climb it in four small steps while your form holds.

The brand’s own advice settles who it’s for.

Bells of Steel suggests buying two units if you swap weights often. A maker telling you to buy two is admitting one is slow to change, so only buy this if your training loads once and stays put.

The change itself goes like this: lay the bell down, undo the bolt, lift the shell, undo the locking nut, swap plates and reverse. Practised, it takes 60 to 90 seconds. New, it’s nearer two minutes.

Decide on the bundle up front. The base set stops at 20.5 kg, and Bells of Steel sells a 12-32 kg bundle in one order. If you already swing 20 kg, you’ll want the heavier plates within months, so the bundle saves a second delivery. Kettlebell sport lifters get the most from this bell, because it keeps one size at every weight, like a set of competition bells.

A true comp-style bell, it tops our handle-and-shape score:

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Pick the Bells of Steel if you train structured strength blocks, want to micro-load presses and get-ups, or want one bell to outlast the rest of your gym. If you do circuits or HIIT, the REP 24kg or Freak Athlete keeps the session moving.

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What worked

• It feels like a fixed cast iron bell. One owner put it best: “if you close your eyes you can’t even tell that it’s an adjustable kettlebell.”
• The dial is quick enough for EMOMs and circuits, with no tools to hunt for.

What didn’t

• Owners pressing it say the 16 to 18 kg step is where they stall. Two kilos is a lot to add on a press.
• The base picks up cosmetic chips. Owner reports say the same, though none mention rust.

Pros

• Cast iron shell, matte powder coat - fixed-bell materials, with the plastic kept to the dial.
• Cheapest quick-change cast iron bell here - the entry point for a true cast iron adjustable.
• Three sizes share the same dial, so the 8-16 kg or 20-40 lb version covers you if 16-24 kg is wrong.

Cons

• Plastic dial selector - the structural question, even though no failure has shown up yet.
• 24 kg ceiling and 16 kg floor - misses beginners and strong lifters by design.
• 1-year warranty - joint-shortest here, level with the Titan Plate Loadable.

The safe money in this category, and the owner data backs it up.

REP has sold this bell for years, and it was the default pick in this category until the Freak Athlete arrived. The most useful long-term report we’ve found is one owner’s 7-month update. The plastic mechanism still worked, the plate clips still held, and the cast iron base had cosmetic chips but no rust.

The dial is a push-and-twist: press down, rotate to your number, lift clear. Five stops cover the range, and every one is a weight most people actually train at.

Buy it clear-eyed about the ceiling.

The day you press 24 kg for reps is the day you start eyeing the Freak. Most home lifters never get there.

Pick the right size before you order. The 16-24 kg bell is the one we scored, and our link opens that version. Check the variant on the page before you pay. Newer lifters should pick the 8-16 kg bell instead.

The plastic dial is the part worth watching, because it’s what locks the plates to the bell. So far it has held up in every long-term owner report we’ve seen.

Value is where it slips, because five bells and a 1-year warranty make it the second-dearest bell here per weight it replaces:

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Pick the REP 24kg if you want a proven cast iron bell, train in the 16 to 24 kg band and won’t need more this year. If you want a lifetime warranty and a wider range, the Freak Athlete is ten points ahead and costs less per bell.

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What’s good

• It tucks into a shelf slot a round bell never would.
• Presses feel stable overhead, where the flat face sits square against the forearm at lockout.

What’s not

• One owner put it plainly: “They would dig into my upper arm and shoulder when flipping the bell into a racked position.”
• In Steve’s coaching sessions, the wide handle window catches clients’ forearms at the top of a swing.
• Owners report the weight labels peeling within six months. A marker over the top fixes it.

Pros

• Smallest footprint here - the light unit measures 5.75 by 4.25 by 10 inches.
• Slimmer handle - 32.8 mm, kinder to smaller hands than the 35 mm bells.
• All-steel build - no plastic structural parts.
• 5-year warranty - the longest fixed-term cover in this guide.

Cons

• Cowbell shape - swings and goblet squats feel awkward.
• Two units for 18 to 62 lb - the pair costs more than one Freak Athlete.
• 4 or 9 lb jumps - no micro-loading.

Small rooms are where the PowerBlock earns its place, and feel is what it gives up.

The two moves most people do with a kettlebell, the swing and the goblet squat, are the two it handles worst. For pressing it’s genuinely good.

There’s a value catch too.

One unit covers only half the range. To get from 18 to 62 lb you buy both, and the pair costs more than a single Freak Athlete that covers more. The compact case is the only one that survives that maths.

If you buy one, start with the light bell: 18, 22, 26 and 35 lb, against 35, 44, 53 and 62 lb on the heavy one. Most people find 35 lb arrives quickly on swings and presses, so budget for the second unit.

The pin keeps it close to the dial bells on speed:

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PowerBlock might be for you if… floor space is your main constraint, you mostly press, and 35 mm handles tire your hands.

It’s not for you if… swings, goblet squats or get-ups are your main lifts. The Freak Athlete shape wins there easily.

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Where it earns its place

• Heavy goblet squats with 25 lb plates feel solid, and suitcase carries are excellent.
• Single-leg RDLs work fine too. None of these lifts care about kettlebell feel.

Where it limits you

• Load 45 lb plates and they bump the inside of your thighs on every squat. 25s are the widest that stay clear.
• The pins leave a little play, so you hear and feel the plates on swings.
• A two-handed swing wants to drop straight down instead of floating up.

Pros

• Cheapest bell here - the lowest entry price in the guide.
• 500 lb capacity - load it heavy for squats and carries.
• All steel - no plastic to fail.
• Uses your Olympic plates - no extra plate cost for barbell owners.

Cons

• Weight sits far below your grip - swings and snatches feel wrong.
• Olympic plates only - standard 1-inch plates won’t fit.
• 1-year warranty - joint-shortest here.

Your barbell plates do the heavy lifting here.

One question decides everything: do you own plates?

Loaded, the plates sit at the bottom of a 19.3-inch rod, well below your hand. That’s why it feels like a sledgehammer on swings and like a decent tool on squats.

Plates slide onto an Olympic sleeve, and two snap pins hold them. There are 9 pin positions an inch apart to suit the stack. Standard 1-inch plates won’t fit, so check yours before you order.

If you own plates, adding kettlebell-pattern lifts costs less here than anywhere else in this guide. If you don’t, you’re buying a rod and a plate set, and the maths stops working fast, so the Bowflex 840 is the better first bell.

For a barbell owner it’s close to free training, and steel on steel, it shrugs off a dropped rep better than most:

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Titan Plate Loadable might be for you if… you already own a barbell and Olympic plates, and want goblet squats, carries and single-leg work for the smallest spend.

It’s not for you if… you don’t own plates, or swing and snatch feel matters to you. The Bowflex 840 is a better starter.

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What’s smart

• Starting at 8 lb lets a true beginner learn the swing before the weight wins.
• The dial is quick, so hunting for the right weight in week one never turns into a chore.

What’s awkward

• The dial sticks if the plates fall out of line. To recover, you tip the bell on its side and press the release pin.
• On a cold morning in an unheated garage, the plastic feels nothing like iron in the hand.

Pros

• Starts at 8 lb - the only true bell here that fits a complete beginner.
• Compact shape - 8.8 by 7 by 12.5 inches, small enough to store under a bench.
• Low entry price - well under the REP 24kg.
• 2-year parts warranty - plus Bowflex’s JRNY app, which is a paid membership.

Cons

• Plastic shell - the lowest durability score here.
• 40 lb ceiling - most adults outgrow it within 6 to 12 months.
• Do not drop - Bowflex says the plates can come loose without warning.

The bell you buy to find out whether kettlebells will stick.

It’s plastic, it stops at 40 lb, and the maker tells you in writing not to drop it. None of that is a flaw for the reader it’s built for. A true beginner needs a light start, a dial they won’t fight, and little outlay before they know the habit will last.

Treat it as a six-to-twelve-month tool.

Most adults grow past 40 lb inside a year. Your swing will be ready for cast iron by then. You’ll also know whether the REP 24kg or Freak Athlete has earned the shelf space.

REP and Bowflex both warn you not to drop their bells, and Bowflex words it most bluntly: “Do not drop the kettlebell, as this can damage the weight plates and locking mechanism and cause weight plates to disengage from the handle without warning.”

The jumps are uneven: 8, 12, 20, 25, 35 and 40 lb. Going from 12 to 20 lb is a big step for a new swing, and 25 to 35 lb is bigger still. Expect to spend longer at each setting than you would with a full rack of fixed bells.

It sits fourth on value. Six bells at a low price keep the cost per bell down, but 2-year cover earns no warranty bonus:

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If you’ve never trained with kettlebells, need to start at 8 lb, or train somewhere a dropped iron bell isn’t an option, the Bowflex 840 is the one to get. If you can already goblet-squat 16 kg, skip it and buy the REP 24kg.

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