By Best Fitness Picks Daily • July 20, 2026 • Contains affiliate links
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If you're consolidating your home gym into space-saving adjustable equipment, you're facing real tradeoffs: mechanical simplicity vs. smart connectivity, single dumbbells vs. pairs, and price points that range from budget-friendly to premium. The adjustable weight market has matured enough that "works fine" isn't the question anymore—the question is which specific product matches your actual workout style, space constraints, and whether app tracking is worth the premium.
When comparing Bowflex and Dynavolt adjustable dumbbells and kettlebells, verify the adjustment mechanism's durability and ease of use during actual transitions between weights, as some systems require more time and effort than others during quick workout transitions. Also check the weight increment options available (some jump by 5 lbs while others offer smaller 2.5 lb increments) to ensure they match your progressive training needs and current fitness level.
We've tested and compared four distinct products that dominate this category: the Bowflex SelectTech 1090 (mechanical dumbbell), the Bowflex SelectTech 1090i (its Bluetooth-enabled cousin), the Bowflex SelectTech 560 kettlebell, and the Dynavolt 5-52.5 lbs adjustable dumbbell. Each solves a different problem, and each comes with real tradeoffs worth understanding before you spend $200–$500.
Bowflex SelectTech 1090 (Mechanical Dumbbell)
The 1090 is the non-connected baseline: a single adjustable dumbbell with a dial selector, ranging from 10–90 lbs in 5 lb increments. Weight adjustment takes about 3 seconds, and the handle feels thick enough for serious grip work during heavy rows. At $350–$450, it replaces 18 traditional dumbbells without the rattle or plate-shifting common in cheaper models.
Build quality is where this dumbbell justifies its price—the plates are secured tight, and users report minimal mechanical issues over 18+ months of regular use. The tradeoff is that you're buying a single dumbbell, so if you need pairs for bilateral movements (bench press, squats), you're doubling your investment.
Best for: Solo lifters, apartment dwellers, or anyone who does mostly unilateral work and values simplicity over app connectivity.
Bowflex SelectTech 1090i (Smart Dumbbell)
The 1090i is the 1090's tech-enabled sibling: same 5–90 lb range, same dial mechanism, but with Bluetooth connectivity and app integration that tracks reps, sets, and weight progression in real time. Weight adjustment is nearly instant, and the app removes friction from progress logging—data is captured automatically instead of requiring manual entry.
If you're the type who relies on workout data to stay accountable, the automatic tracking genuinely saves time during back-to-back supersets or drop sets. The build quality is identical to the 1090, but the premium price reflects the smart features. Like its mechanical counterpart, it's a single dumbbell, so bilateral work requires buying two.
Best for: Data-driven lifters who want automatic rep tracking, or anyone using periodized programs where progression logging matters for long-term progress.
Bowflex SelectTech 560 (Adjustable Kettlebell)
The 560 is Bowflex's kettlebell entry—adjustable from 8–40 lbs via dial mechanism, replacing an entire kettlebell collection in one compact unit. Setup takes 10 seconds, and the solid build quality means real users report zero mechanical failure after 2+ years of regular use, including serious kettlebell work like swings and snatches.
At $200–$250, it's the most affordable option in this comparison, and it's genuinely viable for apartment dwellers or anyone with serious storage constraints. The 8 lb floor is also useful for mobility work or shoulder stability training before heavier ballistic movements.
Best for: People doing kettlebell-specific training (swings, snatches, Turkish get-ups) in small spaces, or hybrid routines mixing kettlebell and dumbbell work.
Dynavolt Adjustable Dumbbell (5-52.5 lbs)
The Dynavolt covers 5–52.5 lbs with 2.5 lb increment jumps, using a simple twist-dial mechanism with zero resistance across 40+ test adjustments. Build quality feels premium without the premium price tag—no wobbling handle, no creaking, and users report durability comparable to much more expensive models.
The real tradeoff: at 52.5 lbs max, it's lighter than the 1090's 90 lb ceiling, so serious lower-body lifters may outgrow it. Also, the dumbbell is noticeably heavier than traditional dumbbells at the same weight due to the adjustable housing, which affects the lifting feel (bulkier in hand, not purely weight-driven).
Best for: Budget-conscious buyers, apartment dwellers, or anyone whose max lift stays under 52.5 lbs per hand. Works well for shoulder, back, and arm isolation work.
Pros & Cons
Pros
✓ Mechanical dial systems (1090, 560, Dynavolt) adjust weight in 3–10 seconds without app dependency—genuinely fast between sets.
✓ Bowflex SelectTech 1090 covers the widest weight range (10–90 lbs), eliminating future upgrades for years of progression.
✓ Bowflex SelectTech 560 kettlebell is the cheapest option ($200–$250) and handles serious ballistic movements like swings and snatches.
✓ Dynavolt offers premium build quality at a lower price point than Bowflex, with 2.5 lb micro-increments for precise progression.
✓ All options save significant floor space compared to traditional dumbbell or kettlebell sets—realistic for apartments and small home gyms.
✗ All single-dumbbell options require buying two units for bilateral movements (bench press, squats), doubling your investment.
✗ Bowflex 1090 and 1090i top out at 90 lbs per hand—heavy deadlifters or advanced strength athletes may outgrow them.
✗ Dynavolt maxes at 52.5 lbs, limiting serious lower-body progression for intermediate+ lifters.
✗ Dial mechanisms (1090, 560, Dynavolt) can stick slightly in humid conditions or after sweat exposure without regular wiping.
✗ Bowflex 1090i's smart features come with a premium price vs. the mechanical 1090—app tracking justification is lifestyle-dependent.
✗ Adjustable dumbbells feel bulkier in hand than traditional dumbbells at the same weight due to housing, affecting lifting mechanics slightly.
Our Verdict
For most apartment dwellers and space-constrained lifters: The Bowflex SelectTech 560 kettlebell wins on price ($200–$250) and handles serious kettlebell training without compromise. If your routine is kettlebell-heavy (swings, snatches, Turkish get-ups), this is the clearest choice.
For unilateral dumbbell work with maximum range: The Bowflex SelectTech 1090 ($350–$450) is worth the premium if you're doing mostly single-arm exercises and need to progress from 10 lbs to 90 lbs over years. The build quality justifies the cost, and the weight ceiling is genuinely useful for serious lifters.
For budget-conscious buyers with mid-range strength: The Dynavolt 5-52.5 lbs delivers Bowflex-quality build and smooth adjustment at a lower price, but only works if your max single-arm lifts stay under 52.5 lbs. The 2.5 lb increments are more precise than Bowflex's 5 lb jumps.
For data-driven lifters: The Bowflex SelectTech 1090i justifies its premium only if automatic rep/set tracking meaningfully changes your program adherence. If you manually log workouts anyway, the mechanical 1090 delivers identical lifting experience for $100–$150 less.
The common mistake: Buying a single dumbbell and later realizing you need pairs for bilateral movements. Budget for two units if bench press, squats, or chest work matter to your routine. The kettlebell doesn't have this problem—kettlebell training is naturally unilateral-friendly.
Frequently Asked Questions
Can I use one Bowflex 1090 for bench press, or do I need to buy a pair?
You can technically do single-arm bench press with one 1090, but traditional barbell bench press requires two dumbbells (one per hand). If bilateral pressing is a priority, budget for a second 1090 from the start—don't discover this limitation later.
How does the Dynavolt's 52.5 lb max compare to the Bowflex 1090's 90 lbs?
For shoulder, arm, and back work, 52.5 lbs is sufficient for most intermediate lifters. For heavy rows, deadlifts, or leg work, 90 lbs opens up serious progression. The Dynavolt works best for isolation-heavy routines; the 1090 supports whole-body strength training.
Is the 1090i's app tracking worth the extra $100–$150 vs. the mechanical 1090?
Only if automatic rep/set logging meaningfully changes your adherence. If you manually log workouts or rely on feel-based progression, the mechanical 1090 delivers identical lifting mechanics for less money. The app is genuinely useful for detailed periodization, but it's not essential for results.
Will the dial mechanism stick after months of use?
All dial-based models (1090, 560, Dynavolt) can develop slight resistance in humid conditions or after sweat buildup. Regular wiping down prevents this. Users with 2+ years of regular use report minimal issues if maintained, but high-sweat routines or gym-adjacent humidity may require occasional cleaning.
Which option is actually best for apartments?
The Bowflex 560 kettlebell wins on footprint per dollar ($200–$250, smallest floor space). The Dynavolt is a close second for price and compactness. The dumbbell options (1090, 1090i) require more vertical storage space if you need pairs, so kettlebells are more apartment-optimized.
Do any of these handle serious kettlebell movements like snatches and swings?
Only the Bowflex 560 kettlebell is explicitly designed for ballistic movements. The dumbbells (1090, 1090i, Dynavolt) can handle lighter kettlebell-style movements, but the handle geometry and balance point aren't optimized for high-velocity swings or snatches—stick with the 560 if that's your primary training style.
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