Gotrax Flex Ultra vs NIU KQi Air
Side-by-side comparison · Specs, scores & AI verdict
Too close to call — scores within 5 points
Why choose one over the other?
Reasons to choose Gotrax Flex Ultra
- •750W peak motor delivers ~7% more power than the NIU’s 700W
- •480 Wh battery offers ~6.5% more capacity than the NIU’s 451 Wh
- •14″ wheels improve stability over the NIU’s 9.5″
- •dual suspension provides both front and rear shock absorption vs none on the NIU
Reasons to choose NIU KQi Air
- •49.9 km range is ~24% longer than the Flex Ultra’s 40.2 km
- •12 kg weight is less than half of the Flex Ultra’s 27.7 kg for easy carrying
- •IP55 water/dust rating vs no rating on the Flex Ultra
- •App support and OTA updates enable firmware upgrades and ride data tracking
| Spec | Gotrax Flex Ultra | NIU KQi Air |
|---|---|---|
| ⚡ Drivetrain | ||
| Peak Power | 750 W ✓ | 700 W |
| Continuous Power | 500 W ✓ | 350 W |
| Max Torque | — | — |
| Top Speed | 32.2 km/h | 32.2 km/h |
| Max Incline | 20 ° ✓ | 17 ° |
| Drive Config | Rear | Rear |
| Dual Motors | ✗ | ✗ |
| 🔋 Battery & Range | ||
| Battery Capacity | 480 Wh ✓ | 451 Wh |
| Amp Hours | 10 Ah ✓ | 9.4 Ah |
| Charge Time | — | 5 h |
| Claimed Range | 40.2 km | 49.9 km ✓ |
| Cell Chemistry | Lithium-ion | Lithium-ion |
| Removable Battery | ✗ | — |
| Regen Braking | ✓ | ✓ |
| 📐 Size & Portability | ||
| Weight | 27.7 kg | 12 kg ✓ |
| Max Payload | 119.8 kg | 120.2 kg ✓ |
| Deck Length | 45.7 cm | 47 cm ✓ |
| Deck Width | 22.9 cm ✓ | 19.1 cm |
| Ground Clearance | 11.4 cm ✓ | 7.4 cm |
| Foldable | ✓ | ✓ |
| 🛤️ Ride Comfort | ||
| Wheel Diameter | 14" ✓ | 9.5" |
| Pneumatic Tires | ✓ | ✓ |
| Puncture Resistant | ✗ | ✓ |
| Suspension | Dual | None |
| Adjustable Susp. | ✗ | ✗ |
| Seat | ✓ | ✗ |
| 🛡️ Safety | ||
| Front Brake | Drum | Disc |
| Rear Brake | Drum | None |
| Front Lights | ✓ | ✓ |
| Rear Lights | ✓ | ✓ |
| Turn Signals | ✗ | ✓ |
| IP Rating | — | IP55 |
| Kids' Scooter | ||
| 📱 Tech & Smart | ||
| Companion App | ✗ | ✓ |
| Riding Modes | — | — |
| Cruise Control | ✓ | ✓ |
| OTA Updates | ✗ | ✓ |
| NFC Anti-Theft | ✗ | ✗ |
| GPS Tracking | ✗ | ✗ |
| Warranty | — | — |
📝 Our Verdict
Riders seeking a more comfortable ride on rough surfaces will prefer the Gotrax Flex Ultra for its dual suspension, larger wheels, and higher battery capacity. Commuters who prioritize portability, longer range, and weather resistance should choose the NIU KQi Air for its light 12 kg frame, IP55 rating, and app connectivity.
