Head-to-head · Best Adjustable Kettlebells

Bells of Steel Adjustable Kettlebell vs Bowflex SelectTech 840

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

Bells of Steel Adjustable Kettlebell comes out ahead by a narrow margin (4.5 vs 4.4). The gap is mostly about serious kettlebell trainees and sport-style lifters who need 12-32 kg in one bell with competition-standard handling — read the strengths below before deciding.

Higher ratedRanked #3 in Best Adjustable Kettlebells

Bells of Steel Adjustable Kettlebell

4.5

$210as of May 19

The Bells of Steel Adjustable Kettlebell is the competition-style pick — IKFF-compliant 35 mm handle, steel shell, and 41 weight settings from 12 to 32 kg with 0.5 kg micro-loading. For lifters who are serious about kettlebell sport or who progress past the 40-lb ceiling that most adjustables top out at, this is the bell that scales with you. The trade-offs are price and adjustment speed; everything else is a clear upgrade over the budget tiers.

Strengths

— Full 12-32 kg range (about 26-70 lb) — widest in this round-up
— 0.5 kg micro-loading — 41 possible weight settings
— Steel shell with iron plates — competition feel, no rattling

Watch-outs

— Most expensive pick here at $280
— Heavier than the Bowflex SelectTech 840 or PowerBlock at all weight levels
— Adjustment is slower than the Bowflex SelectTech 840's dial

$210 · Check Price on Amazon Full review →

Ranked #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 →

How they stack up

Bells of Steel Adjustable Kettlebell

Widest weight range and finest increments of any pick here — beats the REP Fitness on range and the Bowflex SelectTech 840 on ceiling (32 kg vs 18 kg). Loses to the Bowflex SelectTech 840 on adjustment speed. Steel-and-iron build is more durable than the Bowflex SelectTech 840's plastic but heavier to handle than the Yes4All.

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.

Specs side-by-side

Spec	Bells of Steel Adjustable Kettlebell	Bowflex SelectTech 840
Weight Range	12-32 kg (about 26-70 lb)	8 to 40 lb
Weight Settings	41 (0.5 kg micro-load, with expansion pack)	8, 12, 20, 25, 35, 40 lb (6 settings)
Adjustment	Internal locking system	Top dial
Material	Steel shell, iron plates	Plastic shell, steel handle
Handle	35 mm competition-standard	28 mm
Dimensions	8.25 in x 11 in	—
Stand Included	—	Yes

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