CAP Barbell
CAP Barbell Cast Iron Kettlebell
$39.97Cheaper
Best Kettlebells · head-to-head
CAP Barbell Cast Iron Kettlebell vs Bowflex SelectTech 840 Adjustable Kettlebell
A sourced, side-by-side comparison. CAP Barbell Cast Iron Kettlebell is cheaper at $39.97. Every spec and price links to its source.
Which is better: the CAP Barbell Cast Iron Kettlebell or Bowflex SelectTech 840 Adjustable Kettlebell?
On the specs we track, they're closely matched. The CAP Barbell Cast Iron Kettlebell is the cheaper at $39.97.
See CAP Barbell Cast Iron Kettlebell on Amazon See Bowflex SelectTech 840 Adjustable Kettlebell on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | CAP Barbell Cast Iron Kettlebell |  Bowflex SelectTech 840 Adjustable Kettlebell |
|---|---|---|
| US price | $39.97 | $149 |
| Brand | CAP Barbell | Bowflex |
| Released | — | — |
| Weight range (lb) | 10-80 | 8-40 |
| Material | cast-iron | adjustable |
| Coating | — | — |
| Handle diameter (mm) | — | — |
| Adjustable | No | Yes |
| Weight increment (lb) | — | 4 |
| Competition standard | No | No |
| Flat base | Yes | — |
| Single cast construction | Yes | No |
| Warranty years | — | 2 |
Sources — CAP Barbell Cast Iron Kettlebell: capbarbell.com (verified 2026-07-13). Bowflex SelectTech 840 Adjustable Kettlebell: bowflex.com (verified 2026-07-13).
What's the difference between the CAP Barbell Cast Iron Kettlebell and Bowflex SelectTech 840 Adjustable Kettlebell?
Where the two actually differ on the specs we track (4 of 10). Matching specs are omitted.
- Weight range (lb): CAP Barbell Cast Iron Kettlebell 10-80 vs Bowflex SelectTech 840 Adjustable Kettlebell 8-40
- Material: CAP Barbell Cast Iron Kettlebell cast-iron vs Bowflex SelectTech 840 Adjustable Kettlebell adjustable
- Adjustable: CAP Barbell Cast Iron Kettlebell false vs Bowflex SelectTech 840 Adjustable Kettlebell true
- Single cast construction: CAP Barbell Cast Iron Kettlebell true vs Bowflex SelectTech 840 Adjustable Kettlebell false