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BowFlex SelectTech 840 Adjustable Kettlebell Review

The Bowflex SelectTech 840 is an adjustable kettlebell built for home strength and conditioning workouts. Its main appeal is combining six weight settings into one compact unit with fast dial-based adjustment. The clearest limitation is the 40 lb maximum load, which may not be enough for advanced strength-focused users.
Expert reviewed
91
Overall score
Data-driven scoring Expert reviewed Updated analysis

Why we ranked it highly

The Bowflex SelectTech 840 Adjustable Kettlebell is a compact home training tool designed to replace multiple fixed kettlebells with one dial-adjustable unit. It offers six weight settings from 8 to 40 lb, with the listing positioning it for swings, rows, squats, twists, and other full-body exercises. That makes it most relevant for home gym users who want a versatile piece of equipment for both strength work and conditioning-style sessions without dedicating much floor space to separate weights. The product data and reviews suggest it is especially appealing to beginners and intermediate users, as well as anyone training in smaller rooms or shared living spaces. Review sentiment is consistently strong around easy weight changes, solid feel, and convenience. The included JRNY mobile-only trial adds optional guided workout support, although ongoing access requires a subscription after the free period.
90-day review Expert reviewed User feedback Data scoring

Key specs

Item details

Brand Name
Bowflex
UPC
708447912961
Number of Items
1
Global Trade Identification Number
00708447912961
Manufacturer
Johnson Health Tech Trading
Model Number
100790
Part Number
100790
Unit Count
1.0 Count
Item Type Name
Bowflex SelectTech 840 Kettlebell
Included Components
Kettlebell

Measurements

Item Weight
40 Pounds
Item Dimensions L x W
8.82"L x 7.01"W
Handle Diameter
28 millimeters
Number of Pieces
1

Style

Color
Black
Style
Bowflex Kettlebell 8-40lbs

Materials & Care

Material
Composite
Handle Material
Plastic

Features & Specs

Other Special Features of the Product
Adjustable, Ergonomic
Target Use Body Part
Shoulder

Additional details

EU Spare Part Availability Duration
5 Years

Scores breakdown

20 /100

Recovery support

90 /100

Performance

92 /100

Training support

86 /100

Strength training

84 /100

Cardio training

68 /100

Mobility & flexibility

88 /100

Safety

82 /100

Comfort

Strengths

  • Adjustable design replaces six kettlebell weights in one compact unit.
  • Fast dial-based weight changes support smoother exercise transitions.
  • Very strong space-efficiency profile for small home gyms and shared rooms.
  • Build quality and stability scores are high, with reviews frequently describing it as solid and secure in use.
  • Broad customer satisfaction backed by a 4.8/5 rating from 7,630 reviews.
  • Useful for a wide range of kettlebell movements including swings, rows, squats, presses, and twists.

Limitations

  • Maximum load of 40 lb may be limiting for advanced lifters or users who progress quickly.
  • Handle shape may not suit everyone, based on review feedback.
  • Plastic handle and composite construction may be less appealing to buyers who prefer traditional cast-iron kettlebells.
  • Weight options are fixed increments rather than fully granular micro-adjustments.
  • JRNY features require a subscription after the free trial period.
  • Mobility and recovery use are limited compared with products built specifically for stretching or recovery work.

Ideal user profiles

  • Home gym users who want one kettlebell instead of a full rack of fixed weights.
  • Beginners and intermediate trainees building full-body kettlebell routines at home.
  • Apartment dwellers or small-space exercisers who need compact equipment.
  • Users who value quick weight changes during circuit-style strength and conditioning sessions.

Use cases

  • Full-body kettlebell workouts at home.
  • Strength and conditioning circuits with quick load changes.
  • Swings, goblet squats, rows, presses, and core-focused kettlebell sessions.
  • Space-saving home gym setups in bedrooms, apartments, or multipurpose rooms.
  • Beginner-to-intermediate progression without buying multiple kettlebells.
  • Portable training for trips where bringing one adjustable weight is practical.

Fit and positioning

Who this works for

Category positioning

This product sits primarily in the strength training equipment category, with a secondary role in conditioning-focused home workouts. Its main function is to provide adjustable resistance for kettlebell exercises while reducing storage needs compared with owning several separate bells. Within the category, it stands out more for convenience, space efficiency, and ease of use than for maximum loading potential.

Best for

The Bowflex SelectTech 840 is best suited to home gym users who want a compact, multi-use kettlebell for full-body training. Its high scores for training support, ease of use, space efficiency, and customer satisfaction make it especially practical for beginners, intermediates, and anyone doing circuit-style sessions where quick weight changes matter. It also fits well in smaller living spaces where traditional kettlebell sets would be impractical.

Not best for

This product may be less suitable for advanced lifters who need heavier loading for swings, squats, carries, or presses. Buyers who strongly prefer the feel of traditional cast-iron kettlebells may also find the composite body and plastic handle less appealing. It is also not the best fit if your main focus is mobility, recovery, or highly specialized kettlebell programming that requires heavier increments.

Training use

The SelectTech 840 is built to support practical home training with one piece of equipment that covers multiple kettlebell movements. It can fit into strength sessions, conditioning circuits, and general fitness routines where quick changes between loads help maintain workout flow. That makes it useful for users who want adaptable full-body training without building out a larger free-weight setup.

Performance analysis

How it performs in practice

Each scoring dimension is separated into a compact card so the strengths and tradeoffs are easier to compare without reading one long block.

Performance analysis

With a performance score of 90, the Bowflex SelectTech 840 appears to do its main job well: delivering adjustable kettlebell resistance in a compact home-friendly format. The strongest support comes from review feedback describing quick, reliable weight changes, stable selected loads, and a solid feel during common movements such as swings, rows, squats, and presses. The six built-in weight settings give it practical range for many users. The main performance trade-off is its 40 lb ceiling, which may reduce long-term usefulness for advanced strength-focused trainees.

Training support

The training support score of 92 reflects how well this kettlebell fits into real-world home routines. One unit covers multiple loads, which helps users progress without immediately buying a full set. The fast dial system also supports circuit sessions and exercise variety with less interruption between movements. Reviews repeatedly highlight convenience, space-saving design, and ease of switching weights, all of which lower the friction of training consistently at home. More advanced users may outgrow the load range, but for general training support it is a strong option.

Strength training

Its strength training score of 86 points to solid but not unlimited usefulness. The six weight settings support a broad range of beginner and intermediate kettlebell work, and reviews suggest the selected load feels secure in use. The main limitation is progression headroom: 40 lb can work well for many movements, but stronger users may eventually need heavier fixed bells or additional equipment.

Cardio training

With a cardio training score of 84, the SelectTech 840 looks well suited to conditioning sessions built around swings, complexes, and minimal-rest circuits. The adjustable format helps users shift load quickly when combining higher-rep and lower-rep work. It is not a cardio machine, but it can support cardio-style kettlebell training effectively within home workouts.

How it compares

Within the adjustable kettlebell category, this product appears stronger than many alternatives for ease of use, compact storage, and broad home-gym convenience. Its review-backed stability and build quality also help it compare well for everyday training confidence. Where it looks less dominant is maximum loading potential, since stronger users may want more than 40 lb. That means it compares best as a practical all-rounder for beginners and intermediates rather than as a top-end strength tool. If your priority is one compact kettlebell that supports varied full-body training without clutter, it has a very competitive profile.

Ranking summary

The Bowflex SelectTech 840 earns its strong overall score of 91 by performing very well in the areas that matter most for an adjustable home kettlebell. It stands out for space efficiency, ease of use, customer satisfaction, build quality, stability, and training support, all reinforced by a large volume of positive reviews. The ability to replace six kettlebells with one compact unit is its clearest competitive strength. Its ranking is held back slightly by a moderate comfort profile and, more importantly, the 40 lb maximum load, which limits appeal for advanced strength users. For general home use, though, it is a high-performing option.

Buying advice

Consider the Bowflex SelectTech 840 if you want a compact kettlebell for home workouts, especially if space is limited and you value fast weight changes. It makes the most sense for beginners, intermediate users, and households that want one versatile tool instead of multiple fixed bells. Before buying, check whether a 40 lb maximum will be enough for your current and near-term training needs. Also note that the listed materials are composite with a plastic handle, which may feel different from traditional cast-iron kettlebells. If guided training matters to you, review the JRNY subscription terms after the free trial.
91
Overall score

Final verdict

The Bowflex SelectTech 840 Adjustable Kettlebell is a strong option in its category, especially for home users who want versatility without sacrificing space. Its main strength is the combination of quick dial-based adjustment, compact storage, and consistently positive feedback on stability and build quality. The main limitation is simple: the 40 lb cap will not satisfy every advanced strength trainee. For beginners and many intermediate users, though, it offers a very practical way to cover a wide range of kettlebell training with one piece of equipment. Overall, it is a well-rounded and highly accessible adjustable kettlebell.
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Key topics

Bowflex SelectTech 840 Adjustable Kettlebell, Bowflex kettlebell review, adjustable kettlebell, home gym kettlebell, space saving kettlebell, kettlebell for home workouts, strength and cardio kettlebell, Bowflex SelectTech 840 review

Frequently asked questions

What weight range does the Bowflex SelectTech 840 Adjustable Kettlebell offer?
The Bowflex SelectTech 840 adjusts from 8 to 40 lb and replaces six kettlebell settings in one unit. The listed weights are 8, 12, 20, 25, 35, and 40 lb, which gives beginners and many intermediate users a useful spread for full-body training at home.
Is the Bowflex SelectTech 840 good for home gyms?
Yes, its strongest advantage is home-gym practicality. It has a very high space-efficiency score and is repeatedly praised in reviews for replacing multiple kettlebells while taking up minimal room, making it well suited to apartments, bedrooms, and multipurpose workout spaces.
Can beginners use the Bowflex SelectTech 840 Adjustable Kettlebell?
It appears well suited to beginners because the lower weight settings make it easier to start with basic movements and progress over time. Reviews also mention easy operation and stable feel, which can reduce friction for newer users learning swings, squats, rows, and presses.
Is 40 lb enough for kettlebell training?
That depends on your training level and exercise selection. For many beginners and intermediate users, 40 lb can cover a lot of common kettlebell work. For stronger or more advanced lifters, especially on lower-body movements, the 40 lb ceiling may become the main limiting factor.
How easy is it to change weights on the Bowflex SelectTech 840?
Ease of use is one of its standout areas. The dial-based system is designed for quick changes, and reviews frequently describe the adjustment process as smooth, fast, and reliable. That makes it practical for circuits and sessions that involve moving between different exercise loads.
Does the Bowflex SelectTech 840 feel stable during workouts?
Based on its strong stability score and repeated review feedback, it appears stable in normal kettlebell use. Customers commonly mention that the selected weight feels secure with little or no wobble, which is important for swings, rows, squats, and pressing variations.
What materials are listed for the Bowflex SelectTech 840?
The provided specifications list the main material as composite and the handle material as plastic. That gives buyers some basic material disclosure, although it is not as detailed as listings that break down every structural component or coating used in the product.
Does the Bowflex SelectTech 840 include workout content?
It includes a 2-month free trial for JRNY, with mobile-only membership access mentioned in the listing. The description says this is designed for training at home or on the go from a phone or tablet, but continued access requires a paid subscription after the trial unless canceled.

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