BowFlex SelectTech 840 review: is one adjustable kettlebell enough?

The BowFlex SelectTech 840 is trying to solve a very specific home-gym problem: kettlebell training is useful, but a rack of bells takes up space and makes a casual routine feel more permanent than it needs to be.

This is a research-based review, not a hands-on test. The current Amazon listing showed Amazon’s Choice, 1K+ bought in the past month, and a 4.8-star customer rating when checked. The page described six settings from 8 to 40 pounds and a 2-month JRNY trial. Verify current price, seller, and terms before buying.

The best part is the compact range

The 840 gives the buyer a common progression for swings, goblet squats, rows, carries, presses, and twists without a row of individual bells. That is enough variety for many general-fitness routines. It is also easier to store in an apartment, office gym, or spare room that was never designed to hold strength equipment.

The tradeoff is the spacing between settings. A fixed rack gives a coach or lifter more choices and makes it easier to match a precise load. The 840 is better for moving through a repeatable set of broad options than for fine-tuning every exercise.

It is not a competition kettlebell

The all-in-one design changes how the tool should be treated. A traditional cast-iron bell is simple and tolerant of the occasional rough landing. An adjustable mechanism has more to protect. The user should follow the product instructions, place it securely before changing the dial, and avoid assuming that a composite shell can be dropped without consequences.

That limitation is not a dealbreaker. It simply narrows the best use case. The 840 fits controlled home sessions where the buyer values convenience and storage. It is a weaker fit for high-volume kettlebell sport, heavy conditioning, or a training style built around repeatedly dropping equipment.

The subscription detail is secondary, but worth checking

BowFlex includes a JRNY trial with the checked listing. The guided sessions may help a new buyer learn how to structure workouts, but the kettlebell should remain useful after the trial. The purchase makes sense because of the adjustable hardware first; any included software should be treated as a changing bonus rather than the foundation of the value case.

At 3% in the Sports & Outdoors category, this is not a high-percentage Amazon product. It is still a useful commerce page because kettlebell intent is specific, the product has a recognizable brand, and the order value is higher than many small accessories. Comparison links to adjustable dumbbells and benches create a natural next step.

Buying checks that matter

• Confirm the six weight settings and current variation before ordering.
• Make sure the unit can be stored and lifted without hitting furniture or a ceiling.
• Read the current instructions about changing settings, drops, and surface use.
• Compare it with a fixed bell if your routine centers on heavy swings or high-repetition conditioning.
• Check the BowFlex Results Series 552 if dumbbell training is the larger priority.

Final verdict

The BowFlex SelectTech 840 is a space-saving kettlebell pick for buyers who want a useful range in one tidy unit and will train with control. It is not a universal replacement for a kettlebell rack or a heavy fixed bell. For a small home gym, though, the compact format can make the difference between equipment that gets used and equipment that never fits the room.

Verify the current Amazon listing, seller, warranty, and JRNY terms before buying. Well Worth It Lab may earn from qualifying purchases; the Amazon commission table is the source of truth for current rates.