Head-to-head · Best Adjustable Kettlebells

Bowflex SelectTech 840 vs Yes4All Adjustable Kettlebell

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Bowflex SelectTech 840 comes out ahead by a narrow margin (4.4 vs 4.2). The gap is mostly about kettlebell beginners and casual users who want maximum convenience and a confidence-pick from a mainstream brand — read the strengths below before deciding.

Higher ratedRanked #2 in Best Adjustable Kettlebells

Bowflex SelectTech 840

4.4

$150as of May 19

The Bowflex SelectTech 840 is the beginner-friendly default. The dial adjustment is the fastest mechanism among adjustable kettlebells — BarBend rated it 5/5 on adjustment speed — and the bundled stand keeps unused plates out of the way. The trade-off is the plastic shell: it's bulky, doesn't drop well, and feels less authentic for clean or snatch work. For someone starting kettlebell training at home and not sure how far they'll take it, this is the right risk-adjusted pick.

Strengths

— Dial-and-set adjustment is the fastest in this round-up — rated 5/5 by BarBend
— Six weight settings (8, 12, 20, 25, 35, 40 lb) covers most beginner-to-intermediate workouts
— Includes a stand that holds unused plates safely

Watch-outs

— Plastic shell — durability is bounded; not built for repeated drops
— Bulkier shape than fixed bells — cleans, snatches, and rack work feel different
— Tops out at 40 lb — outgrown faster than the REP Fitness 16 kg model

$150 · Check Price on Amazon Full review →

Ranked #5 in Best Adjustable Kettlebells

Yes4All Adjustable Kettlebell

4.2

$60as of May 19

The Yes4All Adjustable is the value pick — about a third the price of the REP Fitness and nearly half the Bowflex SelectTech 840. Cast iron handle plus disc-and-spacer construction means it feels more authentic than plastic-shell alternatives in this price tier, and the 20-40 lb range covers most beginner programming. The trade-offs are adjustment speed and brand support, but for a sub-$60 entry-level option that lets you try kettlebell training without committing $200, it's hard to beat.

Strengths

— Cheapest adjustable kettlebell in this round-up by a wide margin
— Cast iron handle with steel components — better than plastic-shell budget alternatives
— 20-40 lb weight range covers most beginner programming

Watch-outs

— Slower adjustment than the Bowflex SelectTech 840 dial or PowerBlock pin
— Cast iron is less durable on drops than the Bells of Steel steel shell
— Heavier increments (4.6-6 lb per disc) vs Bells of Steel's 0.5 kg micro-loading

$60 · Check Price on Amazon Full review →

How they stack up

Bowflex SelectTech 840

Fastest adjustment mechanism in this round-up — beats the REP Fitness, PowerBlock, and Bells of Steel on dial speed. Plastic shell and 40 lb ceiling are the downsides versus the all-metal competitors. Loses to the REP Fitness on swing feel; wins on convenience and the included stand. Easier first-purchase than the Bells of Steel.

Yes4All Adjustable Kettlebell

Cheapest pick by far — significantly under the Bowflex SelectTech 840, PowerBlock, REP Fitness, and Bells of Steel. Cast iron build is a real advantage over the Bowflex SelectTech 840's plastic shell at this price. Loses to every other pick on adjustment speed and weight ceiling.

Specs side-by-side

Spec	Bowflex SelectTech 840	Yes4All Adjustable Kettlebell
Weight Range	8 to 40 lb	20-40 lb
Weight Settings	8, 12, 20, 25, 35, 40 lb (6 settings)	Plate-and-slide, 4.6-6 lb per disc
Adjustment	Top dial	Spacer disc + secure lock
Material	Plastic shell, steel handle	Cast iron handle, steel components
Stand Included	Yes	—
Handle	28 mm	30 mm

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