Head to head · Adjustable Dumbbells
PowerBlock Elite USA 90 vs SMRTFT NÜOBELL 80
Both are premium adjustable dumbbells that reach heavy loads, with opposite designs. The PowerBlock Elite USA 90 uses welded steel blocks and a selector pin; the NÜOBELL uses a twist-lock handle and looks like a traditional dumbbell.
Specifications come from the manufacturers’ listings; owner feedback is summarised from Amazon customer reviews, checked September 2026. We have not tested either set ourselves.
PowerBlock
Choose the PowerBlock for heavy training and durability
PowerBlock Elite USA 90 · 7.7/10 LiftEvidence editorial score
- 5–90 lb per hand in 2.5 lb steps, welded powder-coated steel and a 5-year residential warranty.
- Short at maximum load (30.5 cm listed) and suitable for heavy training.
- Trade-offs: the block cage can get in the way on some exercises, owners report pin damage if it is dropped, and it is expensive.
SMRTFT
Choose the NÜOBELL for a traditional shape — with caution
SMRTFT NUOBELL 80 · 6.2/10 LiftEvidence editorial score
- 5–80 lb with a fast twist-lock and a knurled steel handle; storage cradles included.
- The traditional shape gives a more familiar feel and low exercise interference.
- Trade-offs: 5 lb increments, a 2-year warranty, and recurring owner reports of mechanism failures, missing parts and fragility.
Load range and increments
The PowerBlock goes higher (90 lb against 80 lb) and in smaller steps (2.5 lb against 5 lb). Smaller jumps make steady progression easier on lighter exercises such as raises and curls, where 5 lb can be a large relative increase.
Shape and feel
The NÜOBELL’s strength is feel: we rate it good for traditional dumbbell feel with low exercise interference, against moderate for the PowerBlock, whose cage some owners find gets in the way. The NÜOBELL is longer at maximum load, though (43.2 cm listed against 30.5 cm).
Durability and warranty
This is the clearest difference. The PowerBlock is rated very good for build and durability, with a 5-year warranty and replacement parts available. The NÜOBELL is rated average for durability with a 2-year warranty, and its recurring owner complaints are mechanism failures and fragility. Neither should be dropped. Overall we score the PowerBlock 7.7 and the NÜOBELL 6.2.
Our adjustable dumbbell buying guide compares all-metal dial systems as well.
Specifications side by side
From the manufacturers’ listings. A dash means the figure was not published or could not be confirmed.
| 2 products | Check price on Amazon → | Check price on Amazon → |
|---|---|---|
| Specifications (manufacturer) | ||
| Weight range | 5–90 lb | 5–80 lb |
| Maximum load | 90 lb | 80 lb |
| Minimum load | 5 lb | 5 lb |
| Increments | 2.5 lb | 5 lb |
| Mechanism | Selector Pin | Twist Lock |
| Adjustment speed | Fast | Fast |
| Length at max load | 30.5 cm | 43.2 cm |
| Handle diameter | 38.1 mm | — |
| Materials | Welded powder-coated steel | Steel plates |
| Expandable | Yes (to 90 lb) | No |
| Storage cradle | No | Yes |
| Warranty | 5-year residential warranty | 2-year residential warranty |
| Price & customer ratings (Amazon) | ||
| Price band | Premium | Premium |
| Amazon customer rating | See current rating on Amazon | See current rating on Amazon |
| Editorial assessment (LiftEvidence) | ||
| LiftEvidence editorial score | 7.7 / 10 (highest) | 6.2 / 10 |
| Best suited to | Heavy Training | Space Saving |
| Less suitable for | Users wanting traditional open dumbbells or high drop tolerance. | Users who drop weights or need increments below 5 lb. |
| Strengths |
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| Drawbacks |
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| Drop tolerance | Low | Low |
| Exercise interference | Moderate | Low |
| Build quality score | 8.0 / 10 (highest) | 6.0 / 10 |
| Durability score | 8.0 / 10 (highest) | 5.0 / 10 |
| Adjustment score | 8.0 / 10 (highest) | 8.0 / 10 (highest) |
| Ergonomics score | 6.0 / 10 | 7.0 / 10 (highest) |
| Versatility score | 8.0 / 10 (highest) | 6.0 / 10 |
| Value score | 7.0 / 10 (highest) | 5.0 / 10 |
| Heavy training score | 8.0 / 10 (highest) | 5.0 / 10 |
| Compactness score | 8.0 / 10 (highest) | 8.0 / 10 (highest) |
Frequently asked questions
Is PowerBlock better than NÜOBELL?
For heavy training and durability, yes: it reaches 90 lb in 2.5 lb steps, has a 5-year warranty and far fewer failure reports. The NÜOBELL’s advantage is its traditional shape and feel.
Which is faster to adjust?
Both are rated fast. The PowerBlock uses a selector pin; the NÜOBELL a twist of the handle.
Can you drop either set?
No. Both are rated low for drop tolerance, and PowerBlock owners report pin damage after drops.
Our recommendation
Choose the PowerBlock for heavy training and durability
Choose the NÜOBELL for a traditional shape — with caution
Compare the other adjustable dumbbells
Our buying guide covers every set we track, with options by use case; the comparison tool lets you put any four side by side.