The Best Adjustable Dumbbells

The dial is what you're paying for. You turn two knobs to the number you want, lift the handle out of the tray, and start your set. Bowflex says the pair replaces 15 separate weights, which works out to 15 settings per hand between 5 and 52.5 pounds. That makes drop sets and supersets easy. It also means you'll use the right weight instead of grabbing whatever's closest.

The footprint is small for what you get. Each dumbbell is about 17 inches long and a little over 8 inches tall, and the pair ships with trays that keep them off your floor. Put them beside a bench in a spare bedroom and the whole setup takes less room than a loveseat. In an apartment, that's the difference between training at home and not training at all.

This design has been around long enough that its weak points are well documented. Owners report the same two things over and over: the dials make weight changes a non-issue, and the housing doesn't forgive a drop onto concrete. Published reviews land in the same place. Lift on a mat, set the dumbbells down instead of dumping them, and they hold up for years.

It's an especially good pick if you're starting out or coming back from an injury. The range starts at 5 pounds a hand, so lateral raises and rotator-cuff work are on the table from day one, and you can nudge the load up without buying anything else. The grip is a wrapped non-slip handle rather than sharp knurling, which is kinder on soft hands in the first few months.

Flaws but not dealbreakers

The handle is thick and the end blocks are wide. On flyes, skull crushers and close-grip presses, those blocks bump your forearms or your chest, and you'll end up tweaking your form a little. If you have small hands, the grip diameter is a stretch, especially on heavy rows.

The trays take up more floor than you'd expect, and 52.5 pounds a hand runs out eventually — on squats, lunges and rows long before presses. There's no expansion kit, so the ceiling is the ceiling. And this isn't a set you can drop between sets. Treat it roughly and the dial mechanism is the thing that breaks.

Each block is about 12 inches long and roughly 6 inches square, which is startling next to a dial dumbbell. PowerBlock says the pair replaces 16 pairs of fixed dumbbells, or 825 pounds of iron. If you're training in a studio apartment or a closet, that difference in shelf space is the whole argument for buying these.

The increments are the best in this lineup for arm and shoulder work. Micro weights come in the box, so you get 2.5-pound steps down low: 2.5, 5, 7.5, 10, then wider jumps as you climb. On lateral raises, a 5-pound jump can be the difference between ten clean reps and four ugly ones. Owners rehabbing a shoulder bring this up constantly.

Changing weight is slower than a dial but much faster than screwing collars on and off. You pull the pin, lift away the outer shells you don't need, and drop the pin back in. Owner feedback says you fumble it for the first few sessions and then stop thinking about it. The pin is magnetic, so it stays seated while you lift.

Durability is where these earn their reputation. Owners describe sets that still work fine after years of regular use, and the feedback on the locking hardware is noticeably calmer than what you see on cheap twist-adjust designs. If you want one purchase that follows you through a couple of moves and a lot of training, this is the safe bet.

Flaws but not dealbreakers

Your hand sits inside a cage. The handle runs through the middle of the block, so your knuckles are enclosed and the weight hangs beside your wrist instead of in line with it. Most owners stop noticing within a week or two. Some never love it, particularly on bench press, where the blocks crowd your chest.

The grip is wide, which smaller hands notice right away. The expansion kits are sold separately, so the 5-to-50 set you order is what you own until you buy more, and a few owners mention the kits need careful installation to seat properly.

PowerBlock lists a five-year warranty on the Elite EXP.

Cast iron buys you a smaller dumbbell at the same weight. Each one is about 10 inches long and under 7 inches square at 50 pounds, tighter than anything else here. There's no cradle to find a home for, either, so you can set them down wherever you finish. In a cramped apartment, that's genuinely useful.

Adjustment is honest manual work. Eisenlink says you only loosen the bolt rather than pulling the whole end off, and that a change takes under ten seconds once you've got the knack — the listing is upfront that the first few tries are clumsy. The set moves in 5-pound steps and includes a pair of 2.5-pound plates for finer jumps.

The payoff is feel. The plates snap together and sit tight, so there's no rattle at the top of a press, and the shape sits closer to a conventional dumbbell than any dial design. Owner feedback skews positive on build quality and quiet operation. If you mostly run a handful of lifts at a few set weights, the slower changes barely register.

Flaws but not dealbreakers

If you superset or run drop sets, this is the wrong choice. Unscrewing both ends between exercises wrecks the pace of a workout, and in practice you'll pick one weight and live with it for the session.

Fifty pounds a hand is the ceiling, with no expansion path, and the loose plates need somewhere to live. No tray comes in the box, so they tend to migrate under the couch.

Eisenlink says it provides a year of quality assurance and after-sales service starting the day after purchase.

You're paying for how this one sits in your hand. The grip is knurled steel, not a fat rubber sleeve, and the diameter is close to a standard dumbbell. On curls and presses that's the difference between holding a weight and holding a brick. It's the main reason people who've spent years in a commercial gym choose this over a dial set.

The range is the widest here outside the heavy singles. Five to 80 pounds a hand covers rows, presses, goblet squats and lunges for most people indefinitely, and Nuobell counts the pair as 32 dumbbells in one. You really are replacing a rack with two handles and a bit of floor.

Changing weight is one motion: twist the handle to the number you want and lift it out. No pin to hunt for, no end caps to spin. The catch is that it only adjusts while it's seated in its cradle, so you have to set it back down squarely every time. Not a dealbreaker, just a habit you'll pick up in a week.

Owner feedback is mostly about the feel and the speed, with a minority reporting mechanism trouble after heavy use. That pattern shows up for nearly every twist-adjust design on the market. Treat the cradle as part of the product rather than an accessory and you'll likely stay in the happy majority.

Flaws but not dealbreakers

The steps are 5 pounds across the entire range. For lateral raises, rear delt work and anything where you're grinding out the last few reps, that's coarse — the PowerBlock's 2.5-pound micro weights are better for that kind of training.

Each dumbbell is about 19 inches long, so flyes and narrow presses feel wide, and a floor press puts the sleeves near your ribs. It's also the most expensive set here, which only pencils out if you lift often enough to care about handle feel.

It's the heaviest dial dumbbell in this guide, and that's the entire reason to buy it. Ten to 90 pounds a hand covers heavy rows, split squats and floor presses that a 52.5-pound set can't reach. Bowflex says it stands in for 17 separate weights. You still change load with a twist, so a heavy session doesn't turn into twenty minutes of swapping plates.

Read the listing closely: this is sold as a single dumbbell, not a pair. For most programs you'll want two, which doubles what you spend, and that's worth knowing before you order. One is plenty if you're adding a heavy dumbbell to an existing rack, or if you mainly do one-arm rows, suitcase carries and single-arm presses.

The grips are knurled rather than smooth, which helps a lot once your hands are sweating under 80 pounds. Each dumbbell is about 17.5 inches long and 9.5 inches square, so it's a big object in a small room. Clear a spot for the tray before it shows up at your door.

There's much less owner feedback on this one than on the 552, mostly because far fewer people need 90-pound dumbbells at home. The mechanism comes from the same family, so published reviews of the SelectTech line tell you more here than the thin set of reports on this particular listing.

Flaws but not dealbreakers

A 10-pound floor is too heavy for the light accessory work most programs include, so it can't be your only dumbbell if you're new to lifting. Plan on pairing it with something lighter, or start with the 552 instead.

It's long, heavy and feels front-loaded in the hand. The dial mechanism still dislikes being dropped, and at 90 pounds that caution matters more, not less. Bail out onto a bench or a thick mat, never onto bare concrete.