Adjustable vs Fixed Kettlebells: Which to Choose?
Adjustable kettlebells save space and money, while fixed kettlebells offer durability and a more authentic feel. We compare the two to help you decide based on your workout style and home gym setup.
ProductPickly is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. It never changes our picks.
Adjustable Kettlebell (Bowflex SelectTech 840)
One kettlebell replaces 6 weights (8-40 lbs). Saves space and money, with quick weight dial. Ideal for small spaces and progressive training.
Check priceTraditional Fixed Kettlebell (Cast Iron)
Classic design, robust build, and authentic swing feel. Requires buying multiple weights for progression, but lasts for decades.
Check priceIf you have limited space or are new to kettlebells, an adjustable kettlebell like the Bowflex SelectTech 840 is the clear winner. It offers 6 weights in one and costs less than buying a full set. For serious lifters who want a durable, competition-style feel and don't mind the space, traditional fixed kettlebells are worth the investment.
Spec by spec
Highlighted cell wins that row.
| Adjustable Kettlebell (Bowflex SelectTech 840) | Traditional Fixed Kettlebell (Cast Iron) | |
|---|---|---|
| Weight Range | 8-40 lbs (6 settings) | Single weight per bell (e.g., 10, 20, 35 lbs) |
| Space Required | One compact unit | Multiple bells for progression |
| Cost for Full Set | ~$300 for one adjustable | ~$500+ for 3-5 fixed bells |
| Durability | Plastic base, moving parts | Cast iron, nearly indestructible |
| Weight Adjustment Speed | Dial to change in seconds | Must pick up a different bell |
| Workout Feel | Slightly bulkier, weight distribution differs | Traditional, balanced swing |
| Suitability for Beginners | Great for gradual progression | May need to buy multiple weights |
Who should buy which
- + You live in an apartment or have a small home gym
- + You are new to kettlebells and want to progress gradually
- + You want to save money by not buying multiple bells
- + You prefer quick weight changes between exercises
- + You have a dedicated home gym with ample storage
- + You are an experienced lifter who needs heavy fixed weights (e.g., 50+ lbs)
- + You value the authentic feel of a cast iron kettlebell
- + You plan to compete or do specific kettlebell sport training
Quick questions
How does an adjustable kettlebell change weight?
Most adjustable kettlebells, like the Bowflex SelectTech 840, use a dial or pin system. You rotate the dial to select the desired weight, and the internal plates lock into place. The weight changes in seconds, eliminating the need for multiple bells.
Are adjustable kettlebells as durable as fixed ones?
Fixed cast iron kettlebells are virtually indestructible. Adjustable models have moving parts and a plastic base, so they are less rugged. However, reputable brands design them for regular home use, and they typically come with a warranty. If you drop weights often, a fixed bell may be safer.
Can I do all kettlebell exercises with an adjustable model?
Yes, most exercises like swings, goblet squats, and presses work fine. However, the larger size and different weight distribution may affect balance during overhead movements. Some users find the handle slightly bulkier, but it is not a dealbreaker for general fitness.