Creator verdict: RecommendsBowFlex SelectTech 840 Adjustable Kettlebell
Head-to-head · Dumbbells & Kettlebells
BowFlex SelectTech 840 Adjustable Kettlebell vs FEIERDUN DS2 5-in-1 Adjustable Dumbbell Set
Which should you buy in 2026? FR Scores, specs, prices and 7 independent video reviews, side by side.
FR Score 8.3 out of 10, Great
Six kettlebells in one: dial from 8 to 40 lb in seconds.
Typical price · Single adjustable kettlebell (8–40 lb) at BowFlex.com
FR Score 7.6 out of 10, Good
Dumbbells, barbell and kettlebells in one box, for under $100.
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The quick verdict
BowFlex SelectTech 840 Adjustable Kettlebell edges ahead with an FR Score of 8.3 vs 7.6, winning on build quality & durability, performance & feel and ease of use & footprint. It’s our Best Kettlebell, while DS2 5-in-1 Adjustable Dumbbell Set is our Best Budget.
Choose SelectTech 840 Adjustable Kettlebell if…
- One dial covers six weights from 8 to 40 lb
- Fastest weight changes of any kettlebell style
- Reasonably priced at about $149
Choose DS2 5-in-1 Adjustable Dumbbell Set if…
- Five uses in one set: dumbbells, barbell, kettlebells, push-up stands and plates
- Very affordable at about $85 for the 45-lb set
- Comfortable grips and secure threaded collars, according to reviewers
Scores
Score breakdown
Each criterion scored 0–10 by our methodology. The winner of each row is highlighted.
CriterionSelectTech 840 Adjustable KettlebellDS2 5-in-1 Adjustable Dumbbell Set
FR Score (overall)
Build Quality & Durability
Performance & Feel
Ease of Use & Footprint
Value for Money
Typical price
Video reviews
Specs
Specs side by side
| Spec | SelectTech 840 Adjustable Kettlebell | DS2 5-in-1 Adjustable Dumbbell Set |
|---|---|---|
| Weight range | 8–40 lb | — |
| Weight settings | 8, 12, 20, 25, 35 and 40 lb | — |
| Replaces | 6 kettlebells | — |
| Adjustment | Dial selector with storage base | — |
| Handle diameter | 28 mm | — |
| Shell | Plastic composite over metal plates | — |
| Warranty | 2 years | 3 years (1,095 days) |
| Model number | 100790 | — |
| Modes | — | Dumbbells, barbell, kettlebells, push-up stands, weight plates |
| Set sizes | — | 20, 30, 45, 70 or 90 lb total |
| 45-lb set ranges | — | Dumbbell 6–22.5 lb each; kettlebell 4–19.5 lb; barbell 8–45 lb |
| Plates | — | Plastic shell molded with high-density iron sand |
| Collars | — | Multi-turn threaded twist-lock knobs |
| Barbell pad | — | Foam sleeve over steel connector |
| Model number (45-lb set) | — | D1ND05PR |
SelectTech 840 Adjustable Kettlebell: pros & cons
- One dial covers six weights from 8 to 40 lb
- Fastest weight changes of any kettlebell style
- Reasonably priced at about $149
- Compact footprint for apartments and small gyms
- Plastic shell isn't meant to be dropped
- Taller, more oval shape than a traditional kettlebell
- 28 mm handle is thinner than standard bells
- 40-lb maximum is light for stronger lifters
DS2 5-in-1 Adjustable Dumbbell Set: pros & cons
- Five uses in one set: dumbbells, barbell, kettlebells, push-up stands and plates
- Very affordable at about $85 for the 45-lb set
- Comfortable grips and secure threaded collars, according to reviewers
- Three years of coverage from FEIERDUN
- Large owner base, so setup tips and long-term feedback are easy to find
- Slow weight changes because collars must be unscrewed
- Sand-filled plates are bulky for the weight
- Barbell mode is short and light compared with a real bar
- Collars can loosen; reviewers suggest retightening between sets
On video
What reviewers say
Creator verdict: RecommendsBowFlex SelectTech 840 Adjustable Kettlebell
Creator verdict: RecommendsFEIERDUN DS2 5-in-1 Adjustable Dumbbell Set
Creator verdict: RecommendsFEIERDUN DS2 5-in-1 Adjustable Dumbbell Set
SelectTech 840 Adjustable Kettlebell vs DS2 5-in-1 Adjustable Dumbbell Set: FAQ
Is BowFlex SelectTech 840 Adjustable Kettlebell better than FEIERDUN DS2 5-in-1 Adjustable Dumbbell Set?
BowFlex SelectTech 840 Adjustable Kettlebell scores higher overall (8.3 vs 7.6 out of 10), winning on build quality & durability, performance & feel and ease of use & footprint. DS2 5-in-1 Adjustable Dumbbell Set still has the edge on value for money.
Which has more video reviews?
We’ve cataloged 3 independent video reviews of SelectTech 840 Adjustable Kettlebell and 4 of DS2 5-in-1 Adjustable Dumbbell Set. Both products’ pages list every review with the creator’s verdict.