Are Adjustable Dumbbells Worth It? Pros, Cons & Best Picks
What Are Adjustable Dumbbells?
Adjustable dumbbells are a versatile and space-saving alternative to traditional dumbbells, allowing users to change the weight resistance with a single piece of equipment instead of owning multiple dumbbell pairs. Unlike fixed-weight dumbbells, which require a separate set for each weight level, adjustable dumbbells enable users to modify the weight by either removing or adding plates through various adjustment mechanisms.
These dumbbells cater to different fitness levels, from beginners looking to build strength to advanced lifters who need heavier resistance. They are particularly popular among home gym enthusiasts, as they reduce the need for bulky storage racks while providing a full range of weight options in one compact design.
Adjustable dumbbells come in various styles and weight increments, making them suitable for diverse training programs such as bodybuilding, circuit training, HIIT workouts, and rehabilitation exercises. By offering quick and easy weight modifications, they help users progress efficiently without interrupting their workout flow.
How Adjustable Dumbbells Work
Adjustable dumbbells utilize different weight adjustment mechanisms that allow users to modify resistance quickly and efficiently. This eliminates the need for an entire rack of dumbbells, making workouts more streamlined. Here’s a closer look at the various types of adjustable dumbbells and how they function:
1. Dial Mechanism (Rotary Selector System)
The dial system is one of the most popular adjustment mechanisms, found in models like the Bowflex SelectTech 552. This system uses a rotary dial on each end of the dumbbell, allowing users to select their desired weight increment.
How It Works:
- The dumbbell rests on a specialized base containing multiple weight plates.
- The user rotates the dial to choose a specific weight level.
- Once selected, only the required plates attach to the handle, while the rest remain in the base.
- When the dumbbell is lifted, it contains only the chosen weight, while the unselected plates stay in place.
Pros:
✔️ Quick and effortless weight adjustments.
✔️ Ideal for drop sets and circuit training.
✔️ Compact and space-efficient.
Cons:
❌ Can feel bulky, especially at lighter weights.
❌ Mechanisms may wear out over time if not maintained properly.
2. Selector Pin System (Stackable Plate Design)
The selector pin system, commonly found in models like the PowerBlock Elite Series, operates similarly to weight stacks in gym machines.
How It Works:
- The dumbbell consists of stacked weight plates that resemble a compact cage.
- A pin or magnetic selector slides into the desired weight slot, securing only the necessary plates.
- When the dumbbell is lifted, only the plates locked in by the selector pin are attached, leaving the others behind.
Pros:
✔️ Very durable and long-lasting.
✔️ Compact, stackable design that minimizes space usage.
✔️ Expandable weight options in some models.
Cons:
❌ Boxy shape may feel awkward for certain exercises.
❌ Slightly slower adjustment process compared to dial-based models.
3. Twist-Lock Mechanism (Quick-Adjust Rotation System)
A twist-lock system, used in models like NÜOBELL Adjustable Dumbbells, allows users to modify the weight with a simple wrist rotation.
How It Works:
- The dumbbell rests on a dock that holds the additional plates.
- By twisting the handle, the mechanism locks in the chosen weight while leaving the unselected plates in the base.
- The transition is almost seamless, requiring minimal effort.
Pros:
✔️ Super-fast adjustment speed.
✔️ Sleek and ergonomic design.
✔️ Easy to use, making it great for beginners.
Cons:
❌ More expensive than other types.
❌ May not be as durable as metal-based adjustable dumbbells.
4. Slide Mechanism (Push-Button or Lever-Based Adjustment)
The slide mechanism, seen in models like NordicTrack Select-A-Weight, is an easy-to-use system where users slide a lever or push a button to change the weight.
How It Works:
- The dumbbell sits in a tray that holds the weight plates.
- A button or lever slides to select the desired resistance level.
- When lifted, only the attached plates remain, while the rest stay in the tray.
Pros:
✔️ Intuitive and user-friendly.
✔️ Compact and easy to store.
✔️ Mid-range price compared to dial or twist-lock models.
Cons:
❌ Weight plates may feel slightly loose.
❌ Adjustment mechanism can wear out over time.
5. Manual Loadable Dumbbells (Traditional Plate and Collar System)
For those who prefer a classic gym experience, some adjustable dumbbells use standard weight plates with spin-lock collars to secure them in place. These function similarly to a barbell, requiring users to manually add or remove plates.
How It Works:
- The dumbbell handle has small barbell-like sleeves that hold weight plates.
- Users manually slide plates onto the handle and secure them with spin-lock collars.
- The weight must be adjusted by removing or adding plates before each set.
Pros:
✔️ Extremely durable and built to last.
✔️ Allows for heavier weight increments compared to other adjustable dumbbells.
✔️ Customizable with standard weight plates.
Cons:
❌ Time-consuming weight changes.
❌ Requires more space for storing plates.
❌ Not as convenient for quick-paced workouts.
Adjustable dumbbells provide a versatile, space-saving solution for home workouts, offering a full range of weight options without requiring multiple dumbbell sets. While twist-lock and dial-based models offer speed and convenience, selector pin and manual loadable options provide enhanced durability and weight expandability.
When choosing the best adjustable dumbbells, consider your fitness goals, space availability, and workout style. Whether you prefer rapid weight changes for HIIT and circuit training or heavy resistance for strength building, there’s a perfect adjustable dumbbell system to suit your needs
When choosing the best adjustable dumbbells for strength training, factors like durability, ease of use, weight range, adjustment speed, and price play a crucial role. Below are five of the top-rated adjustable dumbbells in 2025, each offering unique features to suit different fitness levels and workout styles.
PowerBlock Elite Series
PowerBlock dumbbells are unique due to their stackable, block-like design. Unlike traditional adjustable dumbbells, which mimic the shape of standard dumbbells, PowerBlock dumbbells are compact and highly space-efficient. Their selector pin system makes weight changes straightforward, and the sturdy build ensures they can withstand years of use.
One of their key advantages is expandability. The standard PowerBlock Elite set goes up to 50 lbs per dumbbell, but additional expansion kits allow users to increase the weight up to 90 lbs. This makes them a great investment for lifters who plan on progressing to heavier weights over time.
Despite their practical design, some users may find the square shape slightly restrictive during certain exercises, especially movements that require a lot of wrist rotation. However, their durability and ability to grow with the user make them one of the most cost-effective and long-lasting options on the market.
Bowflex SelectTech 552
The Bowflex SelectTech 552 remains one of the most popular adjustable dumbbells, and for good reason. Its dial-based weight selection system allows for quick adjustments, making it particularly useful for high-intensity workouts or supersets where changing weight quickly is essential. The dumbbells range from 5 to 52.5 lbs, with small 2.5-lb increments for the first half of the weight range, which helps with gradual strength progression.
In terms of design, they are comfortable to hold, featuring an ergonomic handle with a secure grip. However, their size remains constant regardless of the selected weight, which can make certain exercises feel slightly awkward. Another consideration is durability—while these dumbbells are well-made, the adjustment system contains plastic parts that may wear over time if dropped. Still, for those who need a space-efficient, user-friendly dumbbell that covers a broad range of workouts, the SelectTech 552 is an excellent option.
NÜOBELL 80
Speed is a crucial factor for some lifters, especially those doing circuit training or drop sets, and the NÜOBELL 80 excels in this area. Unlike dial or pin-based systems, these dumbbells feature a twist-lock mechanism that allows users to adjust the weight almost instantly. A simple turn of the handle is all it takes to select a new weight, making them one of the fastest and most intuitive options available.
Another significant advantage is their sleek, traditional dumbbell design. Many adjustable dumbbells tend to be longer or bulkier than fixed weights, but NÜOBELL’s structure closely resembles a standard dumbbell, improving balance and comfort during workouts. The 5 to 80 lb range makes them a suitable option for most strength training needs, covering everything from beginner to advanced levels.
That said, they come at a higher price point than other adjustable dumbbells. While their build quality is solid, some users report that they don’t feel quite as durable as metal-based options like PowerBlock. Nonetheless, for those prioritizing quick weight changes and a more natural dumbbell feel, NÜOBELL is one of the best choices available.
NordicTrack Select-A-Weight
For those looking for a cost-effective adjustable dumbbell, NordicTrack’s Select-A-Weight system provides a practical balance between affordability and functionality. These dumbbells range from 10 to 55 lbs and use a slide-adjustment mechanism, allowing users to change the weight quickly without dealing with dials or pins. The adjustment system is relatively smooth, and the overall design is compact, making them a great fit for small home gyms.
While they are an excellent budget option, there are a few compromises. The plates may feel slightly loose compared to higher-end models, and the maximum weight of 55 lbs per dumbbell may not be enough for those aiming for serious strength training. However, for beginners or those focusing on moderate resistance training, this is a solid, cost-effective choice that covers the essentials.
JAXJOX DumbbellConnect
For tech-savvy fitness enthusiasts, JAXJOX offers a smart adjustable dumbbell that integrates with digital tracking and app connectivity. Unlike traditional systems, this dumbbell allows users to select their weight electronically, adjusting between 8 and 50 lbs at the push of a button. The companion app tracks reps, sets, and overall progress, making it an appealing choice for those who like to monitor their workouts closely.
In terms of convenience, it’s hard to beat—there are no dials, pins, or levers to mess with. Everything is done with a simple button press, and the seamless Bluetooth integration means users can track their training in real-time. However, the reliance on electronic components means it requires charging, and there’s always the risk of technical malfunctions. Additionally, at a premium price point, it may not be the best choice for those who just need simple, durable weights without extra features.
Despite its high cost, the smart tracking capabilities and futuristic design make it a standout option for those who love data-driven training.
Which Adjustable Dumbbells Fit Your Training Style?
There is no one-size-fits-all answer when it comes to the best adjustable dumbbells. Those looking for an all-around, easy-to-use model may lean toward Bowflex SelectTech 552, while PowerBlock Elite Series appeals to those who want long-term durability and heavier weight options. If speed and efficiency are a priority, NÜOBELL 80 is one of the fastest-adjusting dumbbells, whereas NordicTrack Select-A-Weight is a solid entry-level choice for budget-conscious users.
For those who love smart tech and detailed workout tracking, JAXJOX DumbbellConnect brings a futuristic element to strength training.
Ultimately, the right choice depends on your budget, workout style, and space limitations. Whether you’re a beginner or an experienced lifter, investing in the right set of adjustable dumbbells can help take your training to the next level.
The Benefits: Space-Saving, Cost-Efficient & Versatile
1. Saves Space
One of the biggest advantages of adjustable dumbbells is their compact design. Instead of needing an entire rack of dumbbells, a single pair of adjustable dumbbells can replace 10 to 15 sets of traditional weights.
2. Cost-Effective
Investing in a full dumbbell set can be expensive, especially if you’re aiming for a variety of weight options. A good adjustable dumbbell set typically ranges from $250 to $600, which is significantly cheaper than buying multiple pairs of traditional dumbbells.
3. Versatile for Strength Training
Adjustable dumbbells allow for a wide range of exercises, from bicep curls and triceps extensions to squats and lunges. Their ability to accommodate different weights makes them suitable for both beginners and advanced lifters.
4. Quick and Easy Weight Adjustments
Unlike traditional dumbbells that require manual swapping, adjustable dumbbells enable rapid weight changes, which is particularly useful for circuit training and progressive overload.
The Drawbacks: Are They as Good as Traditional Weights?
Despite their benefits, adjustable dumbbells come with a few drawbacks:
1. Less Durable Than Fixed Dumbbells
Traditional dumbbells are made from solid metal and can withstand drops and heavy use. Adjustable dumbbells, on the other hand, have plastic components and moving parts, making them more susceptible to wear and tear.
2. Limited Weight Capacity
Most adjustable dumbbells have a maximum weight of 50–90 lbs per dumbbell, whereas traditional dumbbells can go up to 150 lbs or more. If you’re an advanced lifter, this limitation could be a concern.
3. Bulkier Design
Because of their adjustable nature, these dumbbells tend to be longer and bulkier than standard dumbbells, which might affect certain movements like curls or presses.
4. Higher Initial Investment
While they save money in the long run, adjustable dumbbells have a higher upfront cost compared to buying just a few fixed-weight pairs.
Frequently Asked Questions
Verdict: Should You Invest in Adjustable Dumbbells?
Adjustable dumbbells are an excellent investment for anyone looking to build strength, improve fitness, and train efficiently at home. They offer the same versatility as traditional dumbbells while eliminating the need for bulky storage racks. Instead of buying multiple sets that can cost thousands of dollars, a single pair of adjustable dumbbells provides a complete range of weight options in a compact, space-saving design.
For beginners and casual lifters, adjustable dumbbells are a practical and convenient choice. They allow users to start with lighter weights and gradually increase resistance over time without the need to constantly purchase new equipment. Many models offer incremental weight adjustments, making it easy to fine-tune resistance for progressive overload, which is key to effective strength training.
For intermediate and advanced lifters, adjustable dumbbells can also be highly effective, depending on the weight range available. Many models go up to 80 or 90 lbs per dumbbell, which is sufficient for most strength training exercises. Some models, like PowerBlock, even offer expansion kits that allow users to lift heavier as they progress. However, those who consistently train with very heavy weights beyond 90 lbs per hand may eventually find traditional dumbbells or a barbell setup more suitable for their needs.
One of the biggest advantages of adjustable dumbbells is their ability to support diverse training styles. Whether it’s traditional bodybuilding, high-intensity interval training (HIIT), functional fitness, or endurance-based workouts, these dumbbells adapt to a wide range of exercises. Quick-adjustment models like NÜOBELL and Bowflex SelectTech are particularly beneficial for those who incorporate supersets, drop sets, or circuit training into their routines, allowing seamless transitions between different weight levels.
Cost is another key factor. While adjustable dumbbells can seem expensive upfront, they are significantly more cost-effective in the long run compared to purchasing multiple sets of fixed dumbbells. A complete rack of traditional dumbbells can easily cost several thousand dollars, whereas a high-quality pair of adjustable dumbbells typically ranges from $250 to $600, making them a more budget-friendly choice for home gym setups.
However, adjustable dumbbells are not for everyone. Those who prefer the feel and durability of fixed-weight dumbbells may not enjoy the slightly bulkier design that some adjustable models have. Additionally, because they contain mechanical parts, they require more careful handling—unlike traditional dumbbells that can be dropped without concern, adjustable models should be placed down gently to avoid damage to the weight selection mechanism.
Ultimately, whether or not to invest in adjustable dumbbells comes down to personal fitness goals, training preferences, and available space. For most home gym users, they are a smart and efficient solution that provides the flexibility needed for a variety of workouts without taking up excessive space or requiring a massive financial investment. If you’re looking for a versatile, space-saving, and cost-effective strength training tool, adjustable dumbbells are undoubtedly worth considering.