BowFlex SelectTech 840 Adjustable Kettlebell

Product overview

Bowflex SelectTech 840 Kettlebell: What to Know

Because a prior guide on this site flagged an active safety recall on the Bowflex SelectTech 552 adjustable dumbbells, we specifically checked the SelectTech 840 kettlebell against Bowflex's current recall page before including it here. As of this writing, Bowflex's own recall page lists only the SelectTech 552 and 1090 adjustable dumbbells as under active recall, for an impact hazard; the SelectTech 840 kettlebell does not appear on that list. We're disclosing this check explicitly rather than assuming an adjustable Bowflex product is automatically fine, given the 552/1090 precedent, but buyers should still check Bowflex's recall page directly before purchase since recall status can change.

The SelectTech 840 is a dial-adjustable kettlebell covering 8 to 40 lb in six settings (8, 12, 20, 25, 35 and 40 lb per Bowflex's product page), operated by a selector dial rather than manually swapping plates. Bowflex markets it as replacing six single-weight kettlebells in one 8.8 x 7 x 12.5 inch footprint, which is the core appeal for small apartments or garages without room for a full rack of fixed bells. We confirmed a genuine, currently active Amazon.com listing for this exact product (ASIN B07X64MXBS) by fetching the live Amazon page directly.

The mechanical dial-and-plate design is a fundamentally different construction than every other kettlebell in this guide, all of which are single-piece cast iron. That has real tradeoffs: an adjustable unit lets you skip buying a full weight set, but it also introduces moving internal parts that a solid cast bell doesn't have, and Bowflex's own materials position the 840 around controlled strength movements rather than the high-repetition ballistic swings that cast iron bells are typically built for. Bowflex includes a two-month trial of its JRNY workout app with purchase, which is a software add-on rather than a hardware spec and shouldn't be weighted as heavily as material or build differences when comparing to the cast iron options in this guide.

We have not disassembled or stress-tested this kettlebell. The recall status, weight range and dimensions come directly from Bowflex's own recall and product pages.

Key Listed Features