The Best Adjustable Dumbbells for 2021


Adjustable dumbbells

Dumbbells are a powerfully effective, yet enormously underrated tool in fitness today.

One study from Iowa State University shows that lifting weights for less than an hour each week can reduce your chance of stroke by up to 70 percent.  

Dumbbell workouts give you a multi-faceted workout, working your triceps and shoulders. You can also build your pectorals, biceps, legs, glutes, and even calves.

It’s the workout you never knew you needed.

Benefits of Dumbbell Workouts

  • Increased stabilizations
  • Muscle activation
  • Safer than solo bench training
  • More versatile workouts
  • Improved range of motion


Why do I need adjustable dumbbells?

There are two types of dumbbells:

  1. Adjustable dumbbells 
  2. Fixed dumbbells 

As the name suggests, adjustable dumbbells are completely customizable, allowing you to change the weight to make it lighter or heavier, depending on your needs. Enjoy a better range of motion than typically received with traditional barbells for a smoother, more in-depth workout. 

This single pair varies in its maximum and minimum weight options, giving you complete flexibility as you develop your fitness regime, and they’re space-efficient, not requiring a ton of room. 

There is also the choice of plate-loaded adjustable dumbbells and selectorized adjustable dumbbells, which rely upon a knob or dial but often feel unnatural and can distract from the workout at-hand. 

Adjustable dumbbells

How to find the best adjustable dumbbells for 2021

When it comes to adjustable dumbbells, there are just too many different models out there for you to compare them all, which is why, as pro athletes, we take the work out of the process for you. Spend your money wisely without all of the guesswork because these adjustable dumbbells are tried and tested by each of the Gronk brothers before making our list.

In addition to our own expert testing, we also comb the web, analyzing other expert feedback and compiling thousands of real customer reviews to better understand how each product meets the needs of a wide range of customers.

Based on our research, these are the three best adjustable dumbbells in 2021 for your home gym.


MX Select MX55: The Best Adjustable Dumbbells of 2021



  • Most natural feel
  • Attractive design
  • Easy to adjust
  • Comes with a stand
  • Can be pricey
  • Limited to 55 lbs


The MX Select MX55 Adjustable Dumbbells are surprisingly affordable, giving you a much better deal at nearly half the price of other models. Still, it doesn’t sacrifice quality, offering extraordinary value with a reliable design made of high-quality materials. 

These adjustable dumbbells are easily adjustable so you can fit them to you. Even better? They don’t require a ton of space like other dumbbells, so they can fit anywhere.

There’s a reason why they have the Gronk stamp of approval.


Power Blocks: Best for the Heavy Lifter 

powerblock Adjustable dumbbells




  • Easily customizable
  • Affordable
  • Heavyweight
  • May require more room
  • No stand with set
  • Bulky with limited wrist movement


Power Blocks are the best choice when you are looking for something with a little more power. There is an excellent range of motion so you don’t feel limited and can move freely. Reliable and sturdy, these adjustable dumbbells can offer up to 120 pounds for a more punishing workout than you’ll find with most other models. 

We love the ability to add on to our workouts as we get stronger. For those on a budget, it allows you to build your weight over time, but just make sure you leave room for your growing collection. 


Bowflex Select Tech 552 Dumbbells: The Best Dial System 

bowflex Adjustable dumbbells




  • Easy adjustment
  • Space-efficient
  • Very durable
  • Comes with stand
  • Dial system
  • Limited to 52.5 pounds


These use a dial system, but they are clearly marked and surprisingly easy to adjust, only taking about five seconds to adjust so they don’t slow you down between sets. The set is also easy to store, not requiring a ton of space.

However, you are limited to just 52.5 pounds, so while they are not a great fit for expert lifters, they are an excellent system to support beginner and growing athletes. Plus, it’s built to last so it could be the perfect investment to make.

Getting started

Dumbbells are a great choice when you are embarking on a rapid fat loss journey or going on a muscle-building adventure. They are also fantastic for cardiovascular fitness, making for a well-rounded addition to your workout. 

When shopping for the best dumbbells in 2021, these three sets are a great place to start.




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