Our Take
The Bowflex SelectTech 840i is a dial-adjustable kettlebell replacing up to six separate weights in one compact unit. It spans a usable range for home trainers who want kettlebell variety without a rack's worth of kit. Sitting at the premium end of adjustable kettlebells, it targets intermediate home gym users who value convenience over rock-bottom price.
Key Features
Weight range of approximately 8 to 40 lbs (roughly 3.6 to 18 kg), selectable in increments via a dial mechanism
Six weight settings selectable by rotating the dial at the base of the handle
Polished plastic housing with a metal handle core; handle diameter is narrower than a traditional cast-iron kettlebell
Sits in a moulded cradle tray for storage and weight selection — must be placed in the tray to change settings
Handle shape is fixed and upright rather than the curved, offset handle of a conventional kettlebell
Compatible with Bowflex's JRNY app subscription for guided workouts
Our Verdict
A sensible buy for home trainers short on space who want accessible kettlebell training across a moderate weight range. If you're serious about kettlebell sport technique or regularly train above 20 kg, the compromised handle shape and weight ceiling will frustrate you — look at a set of quality cast-iron bells instead.