Bowflex SelectTech 552 Adjustable Dumbbells vs Onnit Primal Kettlebell (16kg) (2026)

✍️ By the 247Verdict Editorial Team📅 Updated 05 October 2026

Which is better? We compared both on score, owner ratings, pros and cons.

Bowflex SelectTech 552 Adjustable Dumbbells

9.2/10 Excellent

4.7★ (26,200 owners)

Replaces 15 pairs of dumbbells. Turn the dial, pick 2.5–24kg in 2 seconds.

Full Review

Onnit Primal Kettlebell (16kg)

9.0/10 Excellent

4.8★ (6,200 owners)

Competition-spec cast iron. Flat base. The most popular single kettlebell for home training.

Full Review

At a Glance

	Bowflex SelectTech 552 Adjustable Dumbbells	Onnit Primal Kettlebell (16kg)
247Verdict Score	9.2/10	9.0/10
Owner Rating	4.7★ (26,200)	4.8★ (6,200)
Verdict	Excellent	Excellent

Quick Verdict

Both are strong choices, but the Bowflex SelectTech 552 Adjustable Dumbbells edges ahead with a 9.2/10 vs 9.0/10. Replaces 15 pairs of dumbbells. Turn the dial, pick 2.5–24kg in 2 seconds. That said, the Onnit Primal Kettlebell (16kg) is worth considering if Competition-spec cast iron. Flat base. The most popular single kettlebell for home training. Check the current price on Amazon →

Pros & Cons Side by Side

Bowflex SelectTech 552 Adjustable Dumbbells

Replaces 15 dumbbell sets (2.5–24kg) in footprint of one pair
2-second dial adjustment — no fumbling between sets
Compact storage tray included
10-year track record of reliability
25 weight settings covers virtually all home strength training

Longer than standard dumbbells — some floor exercises feel awkward
Not designed for dropping — unlike fixed iron
24kg upper limit insufficient for advanced lifters

Onnit Primal Kettlebell (16kg)

Competition-specification dimensions — consistent feel across all weights
Flat base for push-up variations and renegade rows
Single-piece casting with no welds or seams that catch on calluses
Powder-coated finish prevents rust and provides grip without chalk
16kg is the ideal starting weight for most adults' first kettlebell

Single fixed weight — need multiple bells as strength progresses
Premium brand pricing vs generic cast iron alternatives
The primate face design is polarising aesthetically

FAQ

Which is better, Bowflex SelectTech 552 or Onnit Primal Kettlebell (16kg)?

Is the Bowflex SelectTech 552 worth the extra cost?

Yes — Bowflex SelectTech 552 Adjustable Dumbbells scores higher at 9.2/10 vs 9.0/10.

Who is the Bowflex SelectTech 552 best suited to?

Replaces 15 pairs of dumbbells. Turn the dial, pick 2.5–24kg in 2 seconds.

Who is the Onnit Primal Kettlebell (16kg) best suited to?

Competition-spec cast iron. Flat base. The most popular single kettlebell for home training.

What are the main downsides of each?

Bowflex SelectTech 552 Adjustable Dumbbells: Longer than standard dumbbells — some floor exercises feel awkward; Not designed for dropping — unlike fixed iron. Onnit Primal Kettlebell (16kg): Single fixed weight — need multiple bells as strength progresses; Premium brand pricing vs generic cast iron alternatives.

Do owner ratings agree with our verdict?

Largely, yes — Bowflex SelectTech 552 Adjustable Dumbbells sits at 4.7★ from 26,200 verified Amazon owners, and Onnit Primal Kettlebell (16kg) at 4.8★ from 6,200.

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