Descrizione
Electric mobility is not a trend. It is a reclamation of the street, a quiet revolution spinning on a hub motor and a lithium cell. The Urban Current is the instrument of that revolution — a 48V 1000W brushless rear hub motor engineered to transform any 20-inch bicycle into a legitimate electric vehicle, without the noise, without the fuel, and without the six-month waiting list of a factory e-bike.
At the heart of this kit is a toothed brushless motor that delivers 1000 watts of continuous power through a precision planetary gear reduction. The result is immediate, silent torque — the kind that flattens hills and shortens commutes without the whine of a direct-drive alternative. Paired with an intelligent sine-wave controller and an LCD display that reads speed, distance, and battery status in real time, this is not a hobbyist tinker-toy. It is a propulsion system with the voltage and current-headroom of a vehicle-class powertrain.
The conversion is surprisingly democratic: it bolts onto standard 20-inch rear dropouts, accepts both V-brake and disc-brake configurations, and arrives with every connector, torque arm, and throttle needed to complete a weekend installation. The motor housing is sealed against road spray. The wiring harness is color-coded and keyed. This is a system designed by people who understand that a stranded rider at 10 PM is the enemy of every good product decision.
You do not need a new bike. You need a new relationship with the one you already own.
Key Features
- ✦ 1000W Brushless Toothed Motor — Planetary gear reduction delivers 50 km/h top speed with minimal noise and zero cogging drag when coasting
- ✦ 48V Intelligent Sine-Wave Controller — Smooth, silent throttle response with over-current, over-temperature, and low-voltage protection circuits
- ✦ LCD Multi-Function Display — Real-time speedometer, odometer, battery gauge, PAS level, and error-code diagnostics on a daylight-readable screen
- ✦ Dual Brake Compatibility — Machined to accept both V-brake and mechanical/hydraulic disc brake calipers on standard 20-inch ISO rims
- ✦ Plug-and-Play Wiring Harness — Color-coded, keyed connectors eliminate guesswork; includes twist throttle, brake levers with cut-off sensors, and pedal-assist sensor
- ✦ Sealed All-Weather Housing — IP54-rated motor casing resists rain, road spray, and dust ingress for year-round commuting reliability
Technical Specifications
- Motor Type: Brushless Toothed Hub Motor (Planetary Gear)
- Rated Power: 1000W Continuous
- Voltage: 48V DC (Battery Not Included)
- Max Speed: ~50 km/h (31 mph)
- Wheel Size: 20 Inch (Tire Not Included)
- Brake Type: V-Brake and Disc Brake Compatible
- Controller: Sine-Wave, with Protection Circuits
- Display: LCD with Speed / Odometer / Battery / PAS Level
- Installation: Standard 20-Inch Rear Dropout, Color-Coded Harness
- Origin: Mainland China
Application Scenarios
This conversion kit serves urban commuters who already own a quality 20-inch folding or compact bicycle and want electrification without the $1,500–$3,000 price tag of a pre-built e-bike. It is equally at home on the 5-mile office commute, the weekend errand loop, or the campus-to-dorm run. Fleet operators and food-delivery riders will appreciate the low operating cost and field-serviceable design — swap a controller or throttle in minutes without specialized tools. The 20-inch form factor makes it ideal for RV and boat owners who need compact electric mobility at the destination.
Frequently Asked Questions
Q: Does this kit include a battery?
A: No, the battery is sold separately. The kit is designed for a 48V lithium battery pack (Li-ion or LiFePO4) with a discharge current rating of at least 25A continuous. We recommend a capacity of 10Ah or higher for practical range.
Q: Will this fit my bicycle?
A: The motor is built into a 20-inch rim and fits standard 20-inch rear dropouts with an OLD (over-locknut distance) of approximately 135mm. Please measure your frame before ordering. Tires and tubes are not included — you will reuse or purchase 20-inch tires separately.
Q: Can I use this with disc brakes?
A: Yes. The motor hub has mounting points for standard 6-bolt disc brake rotors. V-brake rims are also machined into the rim surface, so both braking systems work out of the box.
Q: How fast will my bike go?
A: On a fully charged 48V battery with a 1000W controller, top speed is approximately 50 km/h (31 mph) on flat ground with a 75 kg rider. Actual speed varies with rider weight, terrain, tire pressure, and wind conditions.
Q: Is this legal for road use?
A: Regulations vary by jurisdiction. In many regions, 1000W / 48V e-bikes require registration or are classified as mopeds. Please check your local electric bicycle laws before riding on public roads.
Q: What happens if I connect the controller wires incorrectly?
A: The wiring harness is color-coded and keyed to prevent misconnection. However, reversing the battery polarity or connecting phase wires incorrectly can damage the controller. Double-check all connections before powering on.
Q: Can I install this myself?
A: Yes, the kit is designed for DIY installation. Basic mechanical skills, a set of hex wrenches, and 1-2 hours of time are typically sufficient. The color-coded connectors eliminate soldering or complex wiring.






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