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Best for Speed & Durability

PowerBlock Pro 100 Adjustable Dumbbells

The fastest weight-switching adjustable dumbbell on the market, scaling all the way to 100 lbs per hand. Rugged enough that Reddit's r/BuyItForLife community calls the Sport 50 'the best adjustable dumbbell ever made.'

$150-$600
Pros
  • Ultra-fast weight switching with pin selector — no dial fumbling
  • Scales to 100 lbs per dumbbell on the Pro model
  • Extremely rugged and long-lasting build quality
  • 5 lb increments on Sport 50 model for precise progression
  • Flat ends allow for push-up use
Cons
  • Square/block shape feels less natural than traditional dumbbells
  • Bulkier design limits some exercises like hammer curls
  • Higher price for the Pro 100 model
Why we recommend it

If you lift heavy and hate waiting between sets, PowerBlock's pin-selector system is unmatched for speed. The Pro 100 is the go-to for serious lifters who need a wide weight range without buying a rack of fixed dumbbells.

Reddit user, r/BuyItForLife

If you don't need any more than 50lbs, the PowerBlock Sport 50 is the best adjustable dumbbell ever made: 5lb increments, flat on the ends