NÜOBELL 580 vs PowerBlock Elite USA

The NÜOBELL 580 wins for most people because it changes weight instantly and feels the most like a real dumbbell, and it's worth its premium. The PowerBlock Elite USA is the value and durability pick, with an all-steel build that grows to 90 lb. Choose the Ironmaster if bombproof metal matters more than speed. Avoid the original Bowflex SelectTech 552: it was recalled for plates dislodging mid-lift, so buy the reinforced Results Series redesign if you want that dial.

NÜOBELL 580

Buy it

The closest an adjustable gets to a real dumbbell: fast, compact, and worth the premium.

• Twist the handle and the weight changes in one motion, with no separate dials or pins to fumble
• Genuine round dumbbell shape and knurled steel handle that feels like a fixed bell
• 5 to 80 lb per hand in one compact unit that replaces 16 pairs

• Plastic outer shells mean you can't drop them without risking damage
• Premium price, and the 80 lb version is a real jump over lighter sets

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PowerBlock Elite USA

Buy it

All-steel, endlessly expandable, and the best value if you can live with the blocky shape.

• Welded steel build with few moving parts that reviewers consistently rate the most durable option
• Expands from 50 up to 90 lb per hand with add-on kits, and a longer warranty than most rivals
• Small footprint and a magnetic selector pin that's quick to set

• The square cage shape feels unnatural and can catch your wrist on some movements
• Pin-and-adder adjustment is a step slower than a single dial or twist

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Side by side

The bottom line

Our overall pick is the NÜOBELL 580 - The closest an adjustable gets to a real dumbbell: fast, compact, and worth the premium. Choose the PowerBlock Elite USA instead if stronger lifters and anyone prioritizing durability and a heavy top-end weight.

Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete Best Adjustable Dumbbells: 4 Sets Compared (and One to Skip).