Dumbbells & Kettlebells Reviews

How you change the weight shapes every workout. Dial systems, like BowFlex's, are the most intuitive: set both dials and lift the dumbbell out of its tray. Twist handles, like NÜOBELL's, are the fastest, often a second or two per change. Magnetic pins, like PowerBlock's, are quick once learned but feel less natural at first. Spin-lock collars on budget sets are the slowest by far, which matters for supersets and drop sets. If you train with short rest periods or switch exercises often, prioritize speed; if you mostly do straight sets, a slower but tougher mechanism is perfectly fine.

Buy for the lifts you'll be doing in a year, not just today. Many people outgrow 25-lb sets quickly on presses, rows and lunges, and plenty of lifters eventually want 70 lb or more for heavy rows and split squats. Expandable systems like PowerBlock's EXP line let you start at 50 lb and add kits later, spreading out the cost. Check the increments as well: 2.5-lb steps make progress on shoulder and arm work far smoother than 5- or 10-lb jumps. For kettlebells, a 40-lb ceiling is plenty for beginners but light for strong two-handed swings.

Almost no adjustable dumbbell is meant to be dropped, and reviewers who run drop tests keep finding the same weak point: plastic selector parts, cradles and locking pieces. Steel-bodied designs hold up best over years of use, while plastic-heavy designs demand gentler handling. Warranty length is a useful signal: PowerBlock covers the Elite EXP's handles and plates for five years (one year for the pin and micro weights), while many dial and twist designs carry two years, though NÜO doubles NÜOBELL coverage to four years when you buy direct. Finally, check recall history: BowFlex's original SelectTech 552 and 1090 dumbbells were recalled in June 2025 after plates dislodged during use.

Most adjustable dumbbells stay the same length at every weight, so a long handle assembly can bump your thighs on curls or feel clumsy on neutral-grip presses. Blocky designs like PowerBlock are compact but feel different from round dumbbells, and some owners find goblet squats uncomfortable. Twist-handle designs like NÜOBELL feel closest to fixed dumbbells. Measure your space for the cradles or an optional stand, and if you train on hard floors, budget for a rubber mat to protect both the floor and the equipment.