Head-to-head · Best Adjustable Kettlebells

PowerBlock Adjustable Kettlebell vs REP Fitness 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

REP Fitness Adjustable Kettlebell comes out ahead by a narrow margin (4.3 vs 4.6). The gap is mostly about intermediate-to-advanced kettlebell users who want competition-shaped swings and cleans without sacrificing space for a full set — read the strengths below before deciding.

Ranked #4 in Best Adjustable Kettlebells

PowerBlock Adjustable Kettlebell

4.3

$72as of May 19

The PowerBlock Adjustable Kettlebell is the alternative shape pick. The cowbell-style flat-angle body genuinely makes overhead presses and rack work more comfortable than the round Bowflex SelectTech 840, but it changes how swings feel — purists prefer the round REP Fitness shape. Four weight settings is the smallest count in this round-up; the magnetic pin adjustment is novel and fast once you learn it. Best for users who care more about press/clean comfort than swing dynamics.

Strengths

— Magnetic pin system for fast adjustment — no dial or twist required
— Flat-angle shape rests more comfortably during cleans and overhead presses
— Rugged steel shell — feels durable in hand

Watch-outs

— Four weight settings only — fewer increments than competitors here
— Cowbell shape (not true kettlebell) changes feel for swings — less natural
— Smaller weight range than the REP Fitness or Bells of Steel

$72 · Check Price on Amazon Full review →

Higher ratedRanked #1 in Best Adjustable Kettlebells

REP Fitness Adjustable Kettlebell

4.6

$220as of May 19

The REP Fitness Adjustable is the most refined adjustable kettlebell in this round-up — cast-iron internal plates with proper thermoplastic locking means it feels like a real kettlebell, not a plastic shell with weights inside. Garage Gym Lab and BarBend both rank it the best overall adjustable for 2026. The catch is you commit to one weight range (most users pick the 16 kg bell which adjusts 8-16 kg). For users who want adjustable-kettlebell convenience without sacrificing the swing/clean/snatch feel, this is the pick.

Strengths

— Cast-iron internal plates with nylon thermoplastic fasteners — no plastic shell rattle
— Push-and-twist adjustment is faster than dial-based competitors
— Competition-style shape keeps swing/clean/snatch feel consistent across weights

Watch-outs

— Single size range — pick 8-16 kg, 16-24 kg, or 20-40 lb; no all-in-one bell
— 5 increments per range is fewer than the Bowflex SelectTech 840's 6
— Pricier than the Yes4All or Bowflex SelectTech at MSRP

$220 · Check Price on Amazon Full review →

How they stack up

PowerBlock Adjustable Kettlebell

Unique cowbell shape in this lineup — REP Fitness, Bowflex SelectTech 840, Bells of Steel, and Yes4All are all traditional round shapes. Magnetic pin adjustment is faster than the REP Fitness twist and the Yes4All disc system, slower than the Bowflex SelectTech 840 dial. Smaller weight range than the REP Fitness or Bells of Steel.

REP Fitness Adjustable Kettlebell

Most refined feel of the picks here — beats the Bowflex SelectTech 840 and PowerBlock on swing dynamics due to the competition-style shape. Loses to the Bowflex SelectTech 840 on quick-change convenience and to the Yes4All on price. Single-range design means you may eventually want a second bell for a different weight bracket.

Specs side-by-side

Spec	PowerBlock Adjustable Kettlebell	REP Fitness Adjustable Kettlebell
Weight Range	18-35 lb (light) or 35-62 lb (heavy)	16 kg bell adjusts 8/10/12/14/16 kg
Adjustment	Magnetic pin	Push-and-twist internal fasteners
Material	Steel shell	Cast iron internal plates, steel shell
Shape	Cowbell-style flat angle	—
Weight Settings	4 settings per bell (18/22/26/35 lb or 35/44/53/62 lb)	5 settings (8/10/12/14/16 kg)
Handle	32 mm competition-standard	35 mm competition-standard
Other Sizes	—	24 kg (16-24 kg) and 40 lb (20-40 lb) options

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