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BowFlex BowFlex SelectTech 840 Adjustable Kettlebell product photoPremium Pick

Rank #5 in Kettlebells

BowFlex SelectTech 840 Adjustable Kettlebell

by BowFlex

4.8
(7,733)

The adjustable option this category was missing β€” every other pick is a single fixed weight. BowFlex state a dial that swaps between 8, 12, 20, 25, 35 and 40 lb, which replaces six kettlebells in the footprint of one.

Best price at

Amazon

$149.00

Buy on Amazon

Price checked Oct 30, 2026

Strengths

  • ↑Dial covers 8-40 lb, per BowFlex β€” six bells in one footprint
  • ↑Removes the buy-a-new-bell problem as you get stronger
  • ↑Space saving where a rack of fixed bells will not fit

Weaknesses

  • ↓Bulkier in the hand than a cast bell of the same weight
  • ↓Mechanism is a failure point a solid bell does not have

Full specs

Weight range
8-40 lb (manufacturer)
Type
Adjustable, dial
Replaces
6 fixed kettlebells
Brand
BowFlex

Full buying guide

Best Kettlebell for Home Gyms and Beginners (2026): Which to Buy

Read the full ranking β†’

Other kettlebells we rate

Ranked alternatives from the same category, with our score and the current price.

The Yes4All powder-coated kettlebell is the default Amazon answer to 'I want one good kettlebell'. Single-piece cast iron, no welds or seams, and Yes4All lists each bell's actual weight within about 3% of the label. The powder coat has a slight texture that Yes4All says grips without chalk, and each weight is colour-coded. The flat bottom matters more than people expect: it lets you do renegade rows or push-ups on the bell without it rocking. Yes4All sells it from 9 to 88 lb. The link opens on the 26 lb bell (Yes4All's listing bullet: "26 Lbs"), single, blue; other weights are on the same listing. Sold by a third-party seller at or under the maker's price, shipped by Amazon (checked 2026-10-21).

The default beginner buy: a solid one-piece cast-iron bell with a vinyl coat that protects your floors and quiets the clank. Sold in single weights from 10 to 50 lb, so you can build a rack a plate at a time without committing to a full set. Delivery note: the 50 lb option we link is sold by Amazon itself, but its listing showed "Usually ships within 1 to 2 months" on 2026-10-17; check the delivery date before you order. Re-checked next pass.

91
score
$73.99

The Amazon Basics enamel kettlebell is an inexpensive 'don't get scammed' kettlebell on Amazon. Solid cast iron core, glossy enamel finish, accurate labeled weight. The catch is that enamel: it's harder than powder coat, which means it doesn't grip chalk as well and feels slicker in sweaty hands. For unweighted-grip work (swings, goblet squats) it's a non-issue. For high-rep snatches or get-ups, you'll want a powder-coated bell. Good emergency-replacement option, or a fine first kettlebell to learn whether you actually like training with bells.

CAP's competition-style bell is the alternative if Yes4All's competition line is out of stock or you want a slightly larger handle. 35mm handle (vs. Yes4All's 33mm) is more forgiving for larger hands but slightly less optimal for very high-rep snatches. The powder coat is thicker than Yes4All's, which means fewer chips but also a slightly slicker feel until it wears in. Same uniform body sizing as any competition bell. Good middle-ground option.

A cast-iron kettlebell that adjusts with plates rather than a dial. Yes4All lists seven settings β€” 7.8, 12.4, 17.9, 23.9, 29.9, 35.4 and 40 lb β€” with marked plates and a lock that holds them on the handle, and a wide handle for two-hand swings. It is the cheaper adjustable route next to the BowFlex 840 dial bell: changing weight is a by-hand job rather than a turn of a dial, and like every adjustable bell the body is bigger than a solid bell of the same weight. Sold by Amazon.

90
score
$89.99
BowFlex SelectTech 840 Adjustable Kettlebell
$149.00
Buy on Amazon