Should you buy it??
Check closely
based on 2 of 5 signals
Quick take
In short: what each side says
AI · critics · buyers · brand claims — each opened up in full further down ↓
Owners love the space-saving design and smooth weight adjustment, but some find the edge can dig into wrists and question long-term durability under heavy use.
The verdict
What the panel makes of it.
Bowflex makes the SelectTech 840 dumbbell. Released around 2007, designed in America. The weight adjusts from five to forty pounds. A dial mechanism shifts resistance without changing handles. Home lifters buy it to replace multiple dumbbells. It saves space in small gyms. AI assistants rank it fourth among adjustable dumbbells.
Act one
What the machines think.
Several AI models read the category and place this product — model by model, list by list, over time.
Rank trajectory?
Weeks of movement.
Act two · ★ new
What the people say.
The same product, judged by the owners who bought and filmed it — what they praise, what they knock, who it's for.
What buyers say?
What Google knows about it.
Beyond the video critics, Google pools 2,299 buyer ratings of the SelectTech 840 from across retailers — a far wider, if blunter, jury. Here’s the shape of that opinion.
2,299 ratings · 7 written
across 4 retailers
What owners single out
In their words
“I purchased this for my husband and I have been using it to help me combat osteoporosis, as well. It is easy to adjust and comfortable to lift. This is so compact and doesn't take up the space that several weights would. I would recommend this to anyone wanting to strength train at home. It is 6 kettlebells in 1! The handle is comfortable, the adjustment dial clicks securely in place and Bowflex m”
Bella · verified purchase · bowflex.com
“I love the versatility of this kettle bell. To have this many weighted kettlebells only take up the space of 1 is amazing. The range of 8 lbs. to 40 lbs. is perfect for someone getting introduced to kettlebell workouts. Seems sturdy and seems like it will last. I think my only major issue is the edge before the weight can dig into y wrist/forearm but this isnt a huge deal and easy to adjust to.”
Periah · verified purchase · dickssportinggoods.com
as of June 9 · 2299 buyer ratings?
The recap
Where it stands today.
- MakerBy Bowflex — see how it ranks across other intents on its brand profile.