isinwheel Step Pro U4 Electric Bike - 250W Power | 10.4Ah Battery | 15.5mph Speed | 55mi Range
isinwheel Step Pro U4 Electric Bike: Compact Commuter
The isinwheel Step Pro U4 is a compact, foldable electric bike that combines power and convenience in one practical package. It features a strong motor, long-lasting battery, and comfortable design and will make your daily commute more enjoyable.
Top speed: 22mph (35kph)
Range: 55mi (89km)
Weight: 58lbs (27kg)
Battery: 374Wh
Motor Power: 250W
Waterproof: IPX4
The most important advantages:
- 01
Powerful Motor for Effortless Performance
The 250W brushless motor with a peak power of 500W ensures smooth acceleration and reliable power, allowing you to conquer hills with up to a 20% grade effortlessly. You can reach speeds of up to 15.5 mph (25 kph) by default and unlock up to 21.7 mph (35 kph) for those who crave extra speed. Whether commuting or exploring, the advanced motor system delivers a responsive and dynamic ride every time.
- 02
Long-Lasting Battery for Extended Adventures
Equipped with a 36V 10.4Ah removable lithium battery, the isinwheel Step Pro U4 offers an impressive range of up to 55 miles (88 km) on a single charge. The battery is designed for longevity, with up to 5,000 charge cycles and built-in protection systems like BMS safety monitoring and overcharge prevention. The battery is also fully removable, allowing easy charging and added security when parked.
- 03
Comfort and Stability on Any Terrain
The dual suspension system with front fork shock absorbers and durable 16” × 2.5” anti-slip pneumatic tires ensures a smooth, comfortable ride over various surfaces, from city streets to rough paths. The high-density padded seat adds extra comfort for long rides, while the adjustable frame height accommodates different users. Safety is a top priority, with a dual braking system and bright LED lighting to enhance visibility, even during night rides.
- 04
Smart Controls and Flexible Riding Modes
The large, easy-to-read LCD display provides vital ride information such as speed, battery level, and distance traveled. You can choose from three levels of pedal assist, pure electric mode, or regular bike mode, adapting the ride to your needs. The additional walk-assist mode makes it easier to push the bike up slopes or through pedestrian zones. The compact folding design also allows for convenient storage and transportation, making it perfect for city living.
Speed, Range, Comfort: The Ultimate Riding Experience
The 250W motor (500W peak power) helps you climb hills up to 20% grade and reach speeds of 15.5 mph (25 kph) standard, with the ability to unlock up to 21.7 mph (35 kph).
The 36V 10.4Ah removable battery delivers up to 55 mi (88 km) of riding distance per charge, perfect for longer commutes and weekend explorations.
The dual suspension system with front fork shock absorbers and 16” × 2.5” anti-slip pneumatic tyres absorb bumps and provide stability on various surfaces.
The large LCD display shows speed, battery level, and distance while offering 3+1 riding modes (three levels of pedal assist, pure electric, and regular bike mode).
Advanced Motor System: Power When You Need It
The isinwheel Step Pro U4 comes with a 250W brushless motor that delivers peak power of 500W when you need it most. This smart system automatically provides extra power when you face hills, headwinds, or added weight.
The upgraded control chip and Hall sensors ensure smooth acceleration. You'll reach 15.5 mph (25 kph) in just 3.8 seconds, with no jerky starts. The electric bike offers four standard speed settings (6/10/15/25 kph) and can be unlocked to reach 21.7 mph (35 kph) for riders who need more speed.
Long-lasting Power, Smart Protection
The isinwheel Step Pro U4 features a high-capacity 36V 10.4Ah (374.4Wh) lithium battery that provides up to 55 mi (88 km) of range on a single charge. Unlike many e-bikes, this battery is fully removable. Just unlock it with the included key and take it with you for charging or security.
The battery consists of multiple protection systems: BMS intelligent safety monitoring, overcharge protection, and UL2849 certification for safety. With 5,000 charge cycles, this battery will last for years of regular use.
Charging takes 4–5 hours, so you can easily recharge between commutes. The battery works reliably in various weather conditions thanks to its IPX4 water resistance rating, giving you the confidence to ride even when the weather isn't perfect.
Comfort All Day, Any Road
Riding the isinwheel Step Pro U4 feels smooth thanks to its thoughtful design. The dual suspension system with front shock absorbers soaks up bumps and potholes, while the 16” × 2.5” anti-slip pneumatic tyres provide excellent grip on wet or uneven surfaces.
The high-density padded seat reduces discomfort on longer rides, and can be adjusted to fit riders from 4'2” to 5'7” (127-170 cm). The step-through frame design makes getting on and off the bike easy.
The bike's strong frame supports riders up to 264 lbs (120 kg) while the bike weighs 58 lbs (26.5 kg). For nighttime safety, the isinwheel U4 includes an adjustable headlight, reflectors, and tail light to ensure you're visible to others.
Multiple Ways to Ride, Maximum Flexibility
Choose from three levels of pedal assist to determine how much help you get from the motor while pedalling. For times when you don't want to pedal at all, use the pure electric mode with the throttle for effortless cruising.
When your battery runs low, or you want to exercise, switch to normal bike mode and use it like a regular bicycle. There's even a walk assist mode for when you need to push the bike up steep ramps or walk it through pedestrian zones.
The large LCD display clearly shows your current speed, battery level, distance travelled, and selected assist level, making it easy to monitor your ride without distraction.
Portable Design: Folds in Seconds
One of the isinwheel U4's best features is how easily it fits into your life. The folding frame collapses quickly to a compact 32.2” × 21” × 27” (82 × 53 × 68.5 cm) size that fits in car boots, under desks, or in small storage spaces. When unfolded, the bike measures 56.3” × 40.5” (143 × 102.5 cm), providing a stable riding platform while remaining nimble enough for city navigation.
Safety First, Reliability Always
The isinwheel Step Pro U4 is built with components that prioritise safety. The dual braking system provides reliable stopping power on wet surfaces. The aluminium alloy frame resists corrosion and provides structural integrity without excess weight.
The IPX4 water resistance rating means light rain won't damage the electrical components. The upgraded Hall sensors deliver precise power control, preventing sudden acceleration that could cause accidents.
The bright headlight can be adjusted to illuminate your path at night, while the rear taillight activates when braking to alert people behind you. Even the tyres are designed with safety in mind - the 16” × 2.5” pneumatic tyres provide better grip and stability than smaller wheels.
What's in the Box
Your isinwheel Step Pro U4 comes with everything you need to get started:
- comfortable seat with seat post,
- front wheel and axle,
- front fender,
- right and left pedals,
- throttle control,
- battery charger,
- battery key,
- user manual,
- complete toolkit with hex wrenches, double open-end wrenches, offset screwdriver, and spare battery key.
Stop struggling with parking, traffic jams, and public transport delays. Enjoy the freedom of electric biking with isinwheel U4.
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Ride worry-free for longer!
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