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Compare two products
Pick any two products from our reviews and see specifications, price, buyer ratings and our scores in one table.
Recorded evidence
What separates these listings
- Price snapshot
- $250.99 price gap
- Product A has the lower captured price. This excludes delivery and ongoing costs.
- Editorial assessment
- Different purposes
- The titles do not establish a shared product type; an overall score is not a head-to-head ranking.
- Specification coverage
- 10 of 19 fields shared
- Shared labels have recorded values on both sides; matching labels do not guarantee matching units or test conditions.
Product A
BowFlex SelectTech 840 Adjustable Kettlebell
- Potential fit
- Space-efficient kettlebell training and flows
- Trade-off to resolve
- Internal selector dial vulnerable to drop impact
Product B
BowFlex Results Series SelectTech Dumbbells
- Potential fit
- Ergonomic supersets with gentle handling
- Trade-off to resolve
- High purchase price
These listing titles do not confirm the same product purpose, even if they share a category. Scores and specification labels may use different criteria; do not treat them as a like-for-like comparison.
Side-by-side evidence
19 of 19 recorded specification fields shown
| Side by side |  |  |
|---|---|---|
| Buyer rating | 4.8 | 4.8 |
| Price | $149.00 | $399.99 |
| Our score | 8.4/10 | 7.9/10 |
| Ratings count | 7,737 ratings | 340 ratings |
| Brand | BowFlex | BowFlex |
| Best for | Space-efficient kettlebell training and flows | Ergonomic supersets with gentle handling |
| Mechanism reliability | 7.6/10 | — |
| Handle ergonomics | 8.5/10 | — |
| Weight progression | 8.0/10 | — |
| Space efficiency | 9.3/10 | — |
| Value proposition | 8.8/10 | — |
| Mechanical selector integrity | — | 7.2/10 |
| Footprint efficiency | — | 9.1/10 |
| Grip and ergonomics | — | 8.4/10 |
| Weight range versatility | — | 8.0/10 |
| Structural durability | — | 6.9/10 |
| Included Components | Kettlebell | Not recorded |
| Item Weight | 40 pounds | 110.6 pounds |
| Item Dimensions L x W | 8.82"L x 7.01"W | 16.9"L x 8.3"W |
| Number of Packs | 1 | Not recorded |
| Item Type Name | Bowflex SelectTech 840 Kettlebell | Not recorded |
| Model Number | 100790 | BFW0025-OS |
| Part Number | 100790 | BFW0025-OS |
| Warranty Description | 2 years | Not recorded |
| Handle Diameter | 28 millimeters | 1.04, 1.43, 4.35 |
| Number of Pieces | 1 | 4 |
| Brand Name | Bowflex | Bowflex |
| Unit Count | 1 Count | 1 Count |
| Number of Items | 1 | 2 |
| Manufacturer | Johnson Health Tech Trading | Johnson Health Tech Inc |
| Material | Not recorded | Plastic, Rubber |
| Handle Material | Not recorded | Alloy Steel, Rubber |
| Set Name | Not recorded | BowFlex Results Series SelectTech Dumbbells (Pair) |
| Color | Not recorded | Black |
| Style | Not recorded | Adjustable |
| Our verdict | Replacing up to six individual bells, this unit consolidates footprint through an internal dial mechanism. Selector systems in adjustable weights represent the primary point of mechanical failure, demanding controlled handling rather than floor drops. Measure ceiling clearance prior to high-volume snatches or overhead presses in low rooms. | The reference standard for dial-adjusted dumbbells, offering smooth ergonomics at a high price point. The plastic locking teeth and internal dials require delicate handling during returns to the cradle. Any drop or impact risks jamming the selector mechanism permanently. |
| Pros and cons |
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Prices and buyer ratings are captured snapshots. A dash means the detail was not recorded, not that a feature is absent. Editorial scores are research assessments, not laboratory measurements.
Sources and limits
This page summarizes our research reviews of Amazon listings, listed specifications and captured buyer ratings. It is not a hands-on test. Scores are editorial assessments, not measured performance; prices are recorded snapshots and may change. A category can include both main products and accessories, so its overall price range is not the cost of a complete setup.
Most recent product record update: September 25, 2026. Individual records may be older; this is not a verification date for every claim. Prices on this page were read from the listings Nov 8, 2026.
- Amazon listing: BowFlex SelectTech 840 Adjustable Kettlebell
- Amazon listing: BowFlex Results Series SelectTech Dumbbells
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