Shopping for adjustable dumbbells is a choice between saving floor space and preserving the feel of a conventional dumbbell. The Bowflex SelectTech 552 and PowerBlock Elite USA 50 both replace a rack of fixed weights with a compact adjustable set, but they handle that job differently. Bowflex uses dial selectors and offers smaller jumps at lighter weights, which suits varied workouts and users who want a familiar shape. PowerBlock uses a pin selector, a block-shaped frame, and optional expansion kits, making it a stronger fit for lifters who value compact storage and a higher potential ceiling. The main tradeoff is intuitive handling and finer increments versus a smaller, expandable design.
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FDB2 Adjustable Dumbbell Set of 2, 5-in-1 Weights (25 lbs each) with Storage Box and Anti-Slip Silicone Grip
- ✔ Weight per dumbbell: 25 lb
- ✔ Total set weight: 50 lb
- ✔ Settings per dumbbell: 4, 10, 15, 20, and 25 lb
UNNMIIY 5-in-1 Adjustable Dumbbell Set (20-90 lbs) – Converts to Barbell, Kettlebell, and Push-Up Stands
- ✔ Listed configurations: 20, 30, 45, 70, and 90 lb
- ✔ Adjustable dumbbell range: 2–22.5 lb per dumbbell
- ✔ Configurations: Dumbbell, barbell, kettlebell, and push-up stand
OLIXIS Adjustable Dumbbell Set, 20/40/60 lbs, 5-in-1 Weight Set
- ✔ Available configurations: 20, 40, and 60 lb
- ✔ Formats: Dumbbells, barbell, kettlebells, weight plates, and push-up stands
- ✔ Plate construction: Cement-and-iron-sand filling with PE outer shell
At a Glance
| Criteria | Bowflex SelectTech 552 | PowerBlock Elite USA 50 | Winner |
|---|---|---|---|
| Weight range | 5–52.5 lb per dumbbell | 5–50 lb per dumbbell in the base set | A |
| Adjustment increments | 2.5 lb steps at lower settings; larger steps at heavier settings | Typically 2.5 lb steps at lower settings, then larger jumps | A |
| Adjustment process | Turn dials on the cradle to select weight | Move a selector pin to choose weight | Depends |
| Grip and handling | Conventional handle and plate-style silhouette | Hand sits inside a compact rectangular frame | Depends |
| Storage footprint | Longer, tray-based footprint | Shorter and more compact than traditional-shaped adjustables | B |
| Expansion | Fixed at 52.5 lb per dumbbell | Expandable with compatible kits, depending on model and availability | B |
| Best use | General home strength training and varied exercises | Space-limited gyms and lifters who may want more weight later | Depends |
FDB2 Adjustable Dumbbell Set of 2, 5-in-1 Weights (25 lbs each) with Storage Box and Anti-Slip Silicone Grip
The FDB2 is the most straightforward pick when workouts involve frequent changes between movements. Each dumbbell offers five defined settings from 4 to 25 lb, and the manufacturer says adjustment takes about a second while the dumbbell rests on its base. That gives us a more predictable progression than the broader conversion kits: we can see exactly which individual loads are available rather than relying on a set’s total weight configurations.Its dual-lock system combines a base adjustment with an auto-lock handle, and the silicone-style grip is designed to stay secure when hands get sweaty. The included storage box also makes the pair easier to keep together than loose plates and connecting hardware. Against UNNMIIY and OLIXIS, FDB2 has the strongest stated per-dumbbell adjustment detail and a cast-iron core, but it offers less load headroom: 25 lb per hand may not last for strength-focused lifters. Adjustments also require returning each dumbbell to its base, so it is not a dial-and-go option mid-rep or away from the storage base.
Pros:
- Five specified settings per dumbbell: 4, 10, 15, 20, and 25 lb
- Quick, one-handed adjustment while seated in the base
- Dual-lock design and anti-slip grip address stability and handling
- Storage box keeps the pair and components together
Cons:
- 25 lb maximum per dumbbell may limit progressive strength training
- Weight changes require the dumbbell to be on its base
Best for: Home trainees who want clearly defined light-to-moderate settings and plan to change loads often during circuits or accessory work.
Not ideal for: Advanced lifters who need heavier dumbbells per hand, or anyone who wants to change weight without returning the dumbbell to its base.
Bottom line: Choose FDB2 for the clearest settings and quickest workout transitions, provided 25 lb per hand is enough for your training.
“Choose FDB2 for the clearest settings and quickest workout transitions, provided 25 lb per hand is enough for your training.”
UNNMIIY 5-in-1 Adjustable Dumbbell Set (20-90 lbs) – Converts to Barbell, Kettlebell, and Push-Up Stands
UNNMIIY makes the most sense when we want one compact kit to support more than dumbbell work. It converts into a barbell, kettlebells, and push-up stands, giving a small home setup options for presses, rows, squats, and bodyweight variations. Its listed configurations span 20 to 90 lb, the broadest total set range in this lineup, and the stated footprint is under two square feet.That flexibility has a limit worth checking before buying: the range is 2 to 22.5 lb per dumbbell, so a 90 lb total configuration does not mean a single dumbbell can reach a heavy load. Compared with FDB2, UNNMIIY offers more conversion modes and a higher listed total range, but it lacks the FDB2’s specified five individual settings and rapid base adjustment. Its plates use cement and iron sand inside PE, which may be bulkier than solid iron alternatives. The upgraded locking nuts and padded connecting rod add practical handling details, yet buyers should be comfortable assembling and changing configurations rather than expecting a dedicated selector-style pair.
Pros:
- Converts among dumbbells, barbell, kettlebells, and push-up stands
- Several listed total configurations, up to 90 lb
- Stated storage footprint is under two square feet
- PE-cased plates and upgraded locking nuts support floor protection and secure assembly
Cons:
- Maximum 22.5 lb per dumbbell may be too light for stronger lifters
- Cement-and-iron-sand plates are bulkier than solid iron alternatives
- Multiple configurations require more setup than FDB2’s base-based adjustment
Best for: Apartment or small-room exercisers who want a compact kit that can shift between dumbbell work and several other exercise formats.
Not ideal for: Advanced lifters needing heavy individual dumbbells, or buyers who prioritize quick, clearly marked load changes over equipment versatility.
Bottom line: Pick UNNMIIY when conversion options and compact storage matter more than heavy per-hand loading or fast adjustments.
“Pick UNNMIIY when conversion options and compact storage matter more than heavy per-hand loading or fast adjustments.”
OLIXIS Adjustable Dumbbell Set, 20/40/60 lbs, 5-in-1 Weight Set
OLIXIS is the simpler multi-format alternative for shoppers who want a five-in-one kit without the broadest total range. It can be arranged as dumbbells, a barbell, kettlebells, weight plates, or push-up stands, with 20, 40, and 60 lb configurations listed. That gives a compact home routine several formats to work with, while its textured connecting rod and four safety expansion nuts address grip and plate security.Compared with UNNMIIY, OLIXIS tops out at a lower listed total configuration and does not provide the same stated under-two-square-foot footprint. The supplied information also does not break down its individual dumbbell increments or per-hand maximum, making it harder to judge progression than with FDB2, whose settings are explicit. Both OLIXIS and UNNMIIY use cement-and-iron-sand filling in PE, so neither has the cast-iron core described for FDB2. OLIXIS is a reasonable fit for varied general exercise, but buyers should confirm that its available loads meet their needs before choosing it for progressive dumbbell training.
Pros:
- Five configurations cover several home-workout formats
- 20, 40, and 60 lb options offer a straightforward range of total setups
- Four safety expansion nuts are specified for plate stability
- Textured connecting rod is designed to improve grip
Cons:
- Maximum listed configuration of 60 lb may limit advanced users
- Individual dumbbell increments and per-hand maximum are not specified
- Cement-and-iron-sand filling may be less durable than solid cast iron
Best for: Beginners or general home exercisers who want multiple exercise configurations and expect to use moderate loads across varied movements.
Not ideal for: Lifters who need specified small weight increments, heavier individual dumbbells, or solid-iron plate construction.
Bottom line: OLIXIS suits general training that benefits from several formats, but its limited load detail makes it a less certain choice for carefully planned progression.
“OLIXIS suits general training that benefits from several formats, but its limited load detail makes it a less certain choice for carefully planned progression.”
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Key Differences
The Bowflex 552 is easier to understand if you already use standard dumbbells. Its shape resembles a conventional adjustable dumbbell, and turning the selector dials is straightforward once the weights are seated correctly in their cradle. Its most useful advantage for many beginners is the finer progression at lighter settings: smaller increases can make it easier to add load gradually to presses, raises, curls, and rehabilitation-style movements. That advantage narrows as the selected weight rises, since the increments become larger.
The PowerBlock Elite USA 50 prioritizes compactness and future flexibility. The hand sits inside a rectangular block rather than behind a long row of plates, so the feel is unusual at first, but the shorter form can be easier to store and maneuver in a crowded room. Its base set tops out at 50 pounds, slightly below the Bowflex, yet compatible expansion kits can raise the ceiling. That makes PowerBlock more adaptable for users whose strength is likely to outgrow the starter configuration.
Neither is a universal winner. The Bowflex is the more approachable pick for users who want a familiar dumbbell shape and carefully graded light loads. PowerBlock makes more sense when available storage is tight or when adding capacity later matters. Compare the full system cost, including any expansion kit you expect to buy: the lower initial purchase price can lose its appeal if you soon need a heavier set.
Detailed Comparison
Weight range (Bowflex SelectTech 552 wins — minor)
The Bowflex 552 reaches 52.5 pounds per dumbbell, compared with 50 pounds for the base PowerBlock Elite USA set. The difference is minor for most new lifters, but Bowflex wins out of the box. PowerBlock can pull ahead for stronger users if a compatible expansion kit is available and purchased; without one, its ceiling is slightly lower.
Adjustment increments (Bowflex SelectTech 552 wins — moderate)
Both sets allow gradual increases at lighter weights, but the Bowflex offers especially fine 2.5-pound changes through much of the lower range before moving to larger jumps. PowerBlock also uses small early increments, though its later steps vary by configuration. This is a moderate Bowflex advantage for beginners, smaller-framed lifters, or anyone trying to progress carefully on isolation exercises. Stronger users may care less about the distinction.
Adjustment process (minor difference)
Bowflex changes load through dials on the storage cradle; PowerBlock changes it with a selector pin. Both depend on returning the dumbbell to its base and setting the selector correctly, so neither works like changing plates on a traditional handle. Which feels faster is personal: dials are visually clear, while a pin can be quick once the weight pattern becomes familiar. This is a tie in practical convenience, with setup habits deciding preference.
Grip and handling (moderate difference)
Bowflex wins on familiarity: its handle and outer profile look closer to standard dumbbells. PowerBlock’s hand-in-frame grip is distinctive and can feel restrictive to people who like a wide range of hand positions or need room around the wrist. The block design also keeps the weight close to the hand, which some users prefer during movement. This is a moderate, highly personal difference; try the frame style if grip comfort is a priority.
Storage footprint (PowerBlock Elite USA 50 wins — moderate)
PowerBlock’s compact block shape gives it the advantage when storage space is scarce. Bowflex includes longer cradles and has a more traditional, elongated form, which can take up more room on the floor or on a shelf. The gap is moderate in a small apartment or a shared room, where every bit of clear floor matters. In a dedicated gym with open shelving, the difference matters less.
Expansion and long-term flexibility (PowerBlock Elite USA 50 wins — major)
PowerBlock wins for users who may need heavier weights later because compatible expansion kits can raise the set’s capacity. That flexibility comes with extra cost and depends on the precise model and kit compatibility, so check before buying. The Bowflex 552 stays at its stated maximum and offers no comparable upgrade path. This is a major difference for lifters already approaching 50 pounds per hand, but a minor one for beginners likely to remain below that range.
Best fit for varied home workouts (moderate difference)
Bowflex has the edge for users who move between pressing, curls, raises, and other exercises that benefit from smaller load increases and a familiar handle. PowerBlock is the better fit when the workout plan is strength-focused, storage is tight, and its grip suits the user. Neither set should be selected on exercise range alone; the available weights and the handling style matter more. The winner depends on the user’s exercises and room.
Bowflex SelectTech 552: Pros and Cons
Pros:
- Familiar dumbbell-like shape and handle
- Fine weight steps at lighter settings help gradual progression
- Slightly higher maximum weight than the base PowerBlock set
Cons:
- Longer, cradle-based storage footprint
- Cannot be expanded beyond its fixed maximum
- Must be returned to the cradle for weight selection
PowerBlock Elite USA 50: Pros and Cons
Pros:
- Compact shape suits smaller workout spaces
- Compatible expansion kits can extend the weight ceiling
- Selector pin can be quick to use after learning the system
Cons:
- Block-style grip feels unfamiliar and may limit wrist comfort for some users
- Base set tops out slightly below Bowflex
- Expansion adds cost and requires checking model compatibility
Who Should Choose What
Choose Bowflex SelectTech 552 if:
- You want a conventional dumbbell feel and do not want a block-shaped frame around your hand.
- You are a beginner or use exercises where small weight increases are useful.
- The base range is enough and you prefer not to plan for add-on expansion.
Choose PowerBlock Elite USA 50 if:
- Your workout area has limited storage space.
- You expect to need more than 50 pounds per hand and value a compatible expansion path.
- You have tried the block-style grip and find it comfortable.
Skip both if: You need very heavy loads from day one, multiple users require separate fast weight changes, or you want the feel and unrestricted grip of fixed dumbbells. A heavier adjustable system or a rack of fixed weights may fit better.
Value for Money
Value depends on how long the starter weight range will serve you. Bowflex is better value for buyers who will stay within its fixed range and benefit from its smaller light-load steps; there is little reason to pay for a future upgrade path you do not need. PowerBlock can justify its price for space-constrained users or lifters likely to outgrow 50 pounds per hand, but count the expansion kit in the total cost. If you will need that kit soon, compare the expanded system price with heavier adjustable sets before deciding. For a typical beginner, the Bowflex’s practical progression may matter more than PowerBlock’s upgrade potential. For a serious lifter with little room, PowerBlock’s compact base and expandable capacity can repay the premium in flexibility.
Final Verdict
Choose the Bowflex SelectTech 552 if you want an approachable adjustable set for general home training, especially when lighter, more gradual load increases and a familiar handle matter. Choose the PowerBlock Elite USA 50 if compact storage is a priority or you expect to add weight later and have confirmed that the expansion kit matches your model. For most beginners choosing between these two as a complete starter set, Bowflex is the easier recommendation. The deciding factor is long-term capacity: if 50 pounds per hand will not be enough, PowerBlock’s expansion path is the better investment.
Frequently Asked Questions
Which adjustable dumbbells are better for beginners?
The Bowflex 552 is usually the simpler fit for beginners who value a familiar shape and gradual increases at lighter weights. PowerBlock remains a good option if storage space is the main concern and its enclosed grip feels comfortable.
Can PowerBlock Elite USA 50 dumbbells get heavier than 50 pounds?
Compatible expansion kits can increase the capacity of some Elite USA configurations. Confirm compatibility with the exact set you plan to buy and include the kit’s cost when comparing value.
Do the Bowflex 552 and PowerBlock Elite USA 50 feel like regular dumbbells?
The Bowflex has a more familiar outline and handle. PowerBlock surrounds the hand with a rectangular frame, so the feel is different and may take adjustment. Grip preference varies, making hands-on familiarity useful when possible.
Which set is better for a small apartment?
PowerBlock is generally the better fit because its compact shape is easier to store in a tight space. Measure the intended storage area and account for the selector mechanism and any accessories before buying.
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