Hi, I'm Nerd – a fan of urban mobility and electric vehicles. This time I tested HR‑X40, small foldable electric bikeI share my experiences below, with links to pictures and an overview of the pros and cons.
Technical features (my summary description)
Motor: 250 W (brushless), enough for urban driving and most flat roads.
Battery: 36 V / 6 Ah (~216 Wh), allows a range of 25 to 30 km, depending on load and driving style.
Maximum speed: approximately 25 km/h – in accordance with EU regulations.
Wheels: 14-inch inflatable tires, suitable for city driving.
Brakes: dual mechanical disc brakes + electronic braking system.
Framework: made of 45# steel, load capacity up to 125 kg.
Weight: around 19–19.5 kg, packed 22.5 kg.
Water resistance: IP54 – protection against spray water.
Charging: about 4 watch.
My practical experience
Acceleration and driving
Starting from a standstill to 25 km/h is quick – the motor is quite responsive. In left-pedal mode or electric-only mode, I achieved a smooth ride around town and on bike paths.
Range
In average use – mixed city and asphalt – I was able to get about 25 km distance traveled, then a drop in battery capacity followed. When driving calmly, the range was close to the lower limit of what was promised.
Comfort and handling
14″ tires and a compact folding design ensure good maneuverability in urban environments. Wheel It is stable and relatively comfortable on smooth asphalt, slightly less comfortable on uneven surfaces.
Brakes and safety
The brakes are reliable, the E-brake system helps with quick stopping. The front LED light is useful, and the rear one is less clearly described, but present.
What bothered me?
Short range – really only about 25 km.
Weight: At almost 20 kg, it's not exactly hand-portable.
Material: The steel frame is robust, but its weight makes it difficult to transport.
Minimum additional equipment: It doesn't have advanced features like a TFT screen, cruise control, or NFC — it's basic, no frills.
Rating by category
| Category | Rating (★‑★5) | Notes |
|---|---|---|
| Acceleration and power | ★★★★☆ | For 250 W motor soliden. |
| Range | ★★★☆☆ | Useful in the city, but not impressive. |
| Comfort and maneuverability | ★★★★☆ | Well-handled, stable most of the time. |
| Safety and brakes | ★★★★☆ | The brakes are responsive, the lighting is basic. |
| Additional features | ★★☆☆☆ | No advanced technologies. |
| Portability | ★★★☆☆ | The weight and size make storage difficult. |
Overall rating: ~3,5 / 5
Is the HR‑X40 for you?
Suitable if:
you are looking for a cheap and compact e-bike for city routes, short rides and easy routes,
you are satisfied with simple electric driving without additional smart functions,
It is not suitable if:
you need a longer range or higher speed (over 25 km/h),
you want more advanced technology (brakes, screen, cruise control),
you expect wheel, which you will often carry.
Buy this tires at Piflar: HR‑X40
To all Electric bikes at the Nerd shop.
