BrainGain SmartBells Pro and NÜOBELL are the two closest competitors in the adjustable dumbbell market. Both use a twist mechanism for instant weight changes. BrainGain offers a higher maximum weight (41.5kg vs 40kg per dumbbell), finer increments (1.5kg vs 2kg), and more weight settings (26 vs 20). BrainGain is independently verified by SaferBuy with a 97.5/100 score. NÜOBELL is a Swedish-designed product with a strong reputation for aesthetics and traditional dumbbell feel. BrainGain is more affordable, starting from €459 per pair compared to NÜOBELL's €549.
Side-by-Side Comparison
| Feature | BrainGain SmartBells Pro 41.5kg | NÜOBELLS 240 |
|---|---|---|
| Max weight per dumbbell | 41.5kg | 40kg |
| Weight settings per dumbbell | 26 | 20 |
| Smallest increment | 1.5kg | 2kg |
| Adjustment time | Under 1 second | Under 1 second |
| Mechanism | Twist-dial | Twist-handle |
| No rattle during lifts | ✅ | ✅ (minimal) |
| Construction | Steel plates, minimal plastic | Steel plates, plastic internals, aluminium handle |
| Drop-safe | No (same as all adjustable dumbbells) | No (warranty excludes drop damage) |
| Warranty | 24 months | 2 years (4 years when bought direct from NÜOBELL Athletics) |
| Independent testing | SaferBuy verified (97.5/100) | None listed |
| Trustpilot reviews | 1,800+ (Excellent) | N/A (reviews on own site only) |
| EU availability | Direct from eu.braingain.fit, free EU delivery | Direct from eu.nuoathletics.com, free EU delivery |
| Colour options | Chrome, Black | Black, Silver, Forest, Sand |
| Price per pair (approx.) | €459 to €689 | €549 to €999+ |
| Specifications sourced from manufacturer websites, April 2026. Prices are approximate and may vary. | ||
Key Differences
1. Weight Range and Increments
This is the most important practical difference between the two products.
BrainGain SmartBells Pro go up to 41.5kg per dumbbell with 26 weight settings in 1.5kg increments. That means you can move from 3kg all the way to 41.5kg in precise steps: 3kg, 4.5kg, 6kg, 7.5kg, and so on.
NÜOBELL's heaviest EU model (the S 240) reaches 40kg per dumbbell with 20 weight settings in 2kg increments: 2kg, 4kg, 6kg, 8kg, up to 40kg.
The 1.5kg difference in maximum weight is small, but the increment gap matters more for progressive overload. If you are bench pressing 25kg dumbbells and the next step is 27kg (NÜOBELL), that is an 8% jump. With BrainGain, the next step is 26.5kg, a 6% jump. Smaller increments reduce injury risk and allow more gradual strength progression, which is especially important for isolation exercises like lateral raises, bicep curls, and shoulder presses where even 1kg can feel significant.
2. Adjustment Mechanism
Both products use a twist mechanism, making them the two fastest adjustable dumbbells available. You twist the handle or dial, select your weight, and lift. No pins, no screw-locks, no waiting.
BrainGain uses a twist-dial on the end of the dumbbell. NÜOBELL uses a twist-handle (you rotate the grip itself). Both achieve weight changes in under 1 second. In practice, the experience is similar. The difference is personal preference rather than functional advantage.
One distinction: NÜOBELL reviews occasionally mention a slight wobble or play in the plates at lower weights. BrainGain's plate lock mechanism eliminates rattle across all weight settings.
3. Build Quality and Durability
Both dumbbells use steel weight plates. Neither product is designed to be dropped, which is standard for adjustable dumbbells in this category.
BrainGain uses steel plates with minimal plastic components. NÜOBELL uses steel plates with plastic internal locking components and an aluminium handle. The aluminium handle gives NÜOBELL a slightly different grip feel compared to BrainGain's steel handle.
BrainGain is independently tested by SaferBuy, a third-party consumer product verification service, scoring 97.5/100 for product quality and 100/100 for matching product description. NÜOBELL does not list any independent third-party testing on their website. They do hold 38 patents on their mechanism technology, which speaks to engineering investment.
4. Warranty and Support
NÜOBELL offers a 2-year standard warranty, extending to 4 years when purchased directly from NÜOBELL Athletics (their official EU store). The extended warranty is a strong offering and one of the longest in the adjustable dumbbell category.
BrainGain offers a 24-month warranty on all purchases. Both brands exclude drop damage from warranty coverage.
BrainGain has 1,800+ verified reviews on Trustpilot with an Excellent rating. NÜOBELL displays reviews on their own website (170+ on the 232 model) but does not have a comparable Trustpilot presence. Third-party review platforms provide an additional layer of transparency since the brand cannot selectively remove negative reviews.
5. Price and Value
BrainGain is the more affordable option at every weight tier.
For a pair capable of reaching 40kg+ per dumbbell, BrainGain SmartBells Pro 41.5kg Chrome starts from €689 per pair. NÜOBELL's equivalent (the S 240 at 40kg) is priced higher, with the original 232 model (32kg max) at €769 per pair.
At the lighter end, BrainGain's 23.5kg model starts from €459 per pair, while NÜOBELL's 220 (20kg) is €549 per pair. BrainGain offers more weight for less money at both the entry and top end of the range.
When you factor in BrainGain's additional weight settings (26 vs 20) and finer increments (1.5kg vs 2kg), the value gap widens further. You are getting more functionality per euro.
Who Should Choose Which?
Choose BrainGain SmartBells Pro if:
- You want the highest maximum weight available in a twist-mechanism dumbbell (41.5kg)
- Progressive overload with fine 1.5kg increments is important to your training
- You value independent third-party product testing (SaferBuy 97.5/100)
- You want more weight settings per dumbbell (26 vs 20)
- Price-to-performance ratio is a priority
- You prefer buying from a brand with 1,800+ verified Trustpilot reviews
Choose NÜOBELL if:
- Design aesthetics and colour variety are a high priority (4 colour options on the S series)
- You prefer a 4-year extended warranty (when buying direct)
- You specifically want a Swedish-designed product with established brand heritage (since 2007)
- You are comfortable with 2kg increments and do not need the finer 1.5kg steps
- You train exclusively in the 2-40kg range and do not need the extra 1.5kg of headroom
Verdict
BrainGain SmartBells Pro and NÜOBELL are the best two twist-mechanism adjustable dumbbells on the market. Both are well-built, fast to adjust, and available with free EU delivery.
BrainGain wins on the specs that matter most for training: more weight settings (26 vs 20), finer increments (1.5kg vs 2kg), a higher maximum weight (41.5kg vs 40kg), and independent third-party verification. It is also the more affordable option across all weight tiers.
NÜOBELL wins on design heritage, colour variety, and warranty length (4 years when bought direct). It is a premium product with a loyal following and strong reviews.
For most home gym users, especially intermediate to advanced lifters who need precise progressive overload and the option to go heavy, BrainGain SmartBells Pro offers better value and more capability. If aesthetics and brand heritage are your top priority and you are happy with 2kg jumps, NÜOBELL is an excellent alternative.
Frequently Asked Questions
Is BrainGain heavier than NÜOBELL?
Yes. BrainGain SmartBells Pro reach 41.5kg per dumbbell compared to NÜOBELL's maximum of 40kg (S 240 model). The difference is 1.5kg, which matters most for heavy compound movements where you are training close to your maximum.
Do BrainGain and NÜOBELL use the same mechanism?
Both use a twist mechanism for instant weight changes, making them the two fastest adjustable dumbbells available. BrainGain uses a twist-dial on the end of the dumbbell, while NÜOBELL uses a twist-handle where you rotate the grip itself. Both achieve changes in under 1 second.
Which has better increments for progressive overload?
BrainGain. The SmartBells Pro adjust in 1.5kg increments (26 settings), while NÜOBELL adjusts in 2kg increments (20 settings). Smaller increments allow more gradual strength increases, reducing the risk of plateaus and injury from weight jumps that are too large.
Are NÜOBELL dumbbells available in Europe?
Yes. NÜOBELL sells directly through eu.nuoathletics.com with free EU delivery and a 4-year warranty when purchased from their official store. BrainGain also sells directly across the EU from eu.braingain.fit with free delivery and a 24-month warranty.
Which is better value for money?
BrainGain offers more weight settings, finer increments, a higher maximum weight, and independent third-party testing at a lower price point. The SmartBells Pro 41.5kg pair starts from €689 while NÜOBELL's comparable S 240 (40kg) is priced higher. BrainGain delivers more functionality per euro spent.
Sources
- SaferBuy independent verification report: https://www.saferbuy.fr/en/braingain-haltere-reglable
- BrainGain Trustpilot reviews: https://uk.trustpilot.com/review/braingain.fit
- NÜOBELL official EU store: https://eu.nuoathletics.com
- Momma et al., "Muscle-strengthening activities are associated with lower risk and mortality," British Journal of Sports Medicine, 2022
- von Haehling et al., "An overview of sarcopenia," Journal of Cachexia, Sarcopenia and Muscle, 2010
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