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QNUT BK20 Electric Fat Tire Bike – 48V 18Ah Battery
QNUT BK20 Electric Fat Tire Bike – 48V 18Ah Battery
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QNUT BK20 Electric Fat Tire Bike – 48V 18Ah Removable Battery
Ride in standout retro style with the QNUT BK20 Electric Fat Tire Bike. Designed for adult riders, this motorcycle-inspired e-bike combines wide 20" x 4.0" tires, a removable lithium battery, a 7-speed drivetrain, and a suspension fork for everyday commuting and recreational adventures.
From city streets to suitable gravel paths and sandy terrain, the BK20 offers a distinctive design with the flexibility of electric assistance.
Key Features
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1500W Peak Motor: The supplier advertises up to 1500W peak output. Confirm the rated continuous motor power before ordering.
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48V 18Ah Removable Battery: A removable battery makes charging and storage more convenient.
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20" x 4.0" Fat Tires: Wide tires provide a broad contact patch for pavement, gravel, packed trails, and other suitable surfaces.
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7-Speed Drivetrain: Choose gears to match your pedaling effort and riding conditions.
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Suspension for Added Comfort: The supplier describes a suspension fork and also advertises front and rear hydraulic suspension. Confirm the exact configuration for the BK20 model.
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Dual Disc Brakes: Designed to provide controlled braking when properly installed, maintained, and adjusted.
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Smart LCD Display: Monitor available riding information such as speed, battery level, and distance.
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LED Headlight: Added visibility for low-light conditions. Use appropriate lighting and reflective gear when riding.
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Retro Motorcycle-Inspired Styling: A distinctive frame design for riders who want a bold look.
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Advertised 1-Year Warranty: Confirm coverage, exclusions, and replacement-part terms with the seller.
Removable Battery Convenience
The BK20 is listed with a 48V 18Ah lithium battery, providing approximately 864Wh of nominal energy based on the advertised voltage and capacity.
The removable design allows you to take the battery to a suitable charging location without bringing the entire bike indoors. Always use the charger approved for the exact battery and follow the manufacturer's charging and storage instructions.
Fat Tires for Versatile Riding
The 20" x 4.0" fat tires are designed to provide stability across a variety of surfaces, including pavement, gravel, and packed trails. Ride according to trail conditions and your skill level; fat tires do not make every surface or weather condition safe.
The 7-speed drivetrain helps you adjust pedaling effort for changing terrain, while the LCD display provides useful information during your ride.
Product Specifications
| Specification | Details |
|---|---|
| Brand | QNUT |
| Model | BK20 |
| Product Type | Adult Electric Fat Tire Bicycle |
| Motor | Brushless; 1500W peak advertised |
| Rated Continuous Motor Power | Requires supplier confirmation |
| Battery | 48V 18Ah lithium battery |
| Nominal Battery Energy | Approximately 864Wh |
| Advertised Range | 60–90 miles under stated conditions; verify with supplier |
| Advertised Maximum Speed | Up to 28 mph; verify actual configuration |
| Tire Size | 20" x 4.0" |
| Gearing | 7-speed |
| Brakes | Dual disc brakes |
| Suspension | Suspension fork advertised; rear suspension configuration requires confirmation |
| Display | LCD |
| Lighting | LED headlight advertised |
| Frame Material | Carbon steel, according to supplier |
| Folding | Non-folding |
| Rider Capacity | One person |
| Certification | UL 2849 claimed by supplier; documentation should be verified |
| Warranty | Advertised 1 year; written terms require confirmation |
| Assembly | Assembly and safety checks required |
Range and Performance
The supplier advertises a range of approximately 60–90 miles, depending on riding conditions. Actual distance per charge can vary substantially with rider weight, terrain, speed, temperature, tire pressure, battery age, and pedal-assist level.
The supplier also advertises speeds up to 28 mph. Confirm the exact model's maximum assisted speed, throttle behavior, and continuous motor rating before purchase. These details may affect the bike's legal classification and where it can be ridden.
Safety and Assembly
Before riding, verify that the handlebars, wheels, pedals, brakes, tires, and battery are correctly installed and secured. Check brake function and tire pressure before every ride. Have a qualified bicycle technician inspect the bike if you are unsure about assembly or adjustments.
Do not assume the bike is certified based only on a product listing. Request the relevant UL 2849 documentation for the exact model before relying on that claim.
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At ChargeMyEBike.com, we help riders explore electric mobility products for everyday transportation and recreational riding.
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Review the specifications and confirm battery, motor, warranty, and certification details before placing your order.
【Unleash the Power】The Electric bicycle for adults with 1500W Peak powerful motor, it delivers powerful acceleration and a top speed of up to 28 MPH. The 7-speed transmission system allows you to effortlessly handle various road conditions, whether climbing hills or sprinting on flat terrain, enjoying the thrill of speed.
【Go the Distance】The Adult electric bicycle with a removable 48V 18Ah high-capacity lithium-ion battery, combined with an intelligent battery management system (BMS), ensuring safe and efficient power supply. A single charge can meet your daily commuting, weekend outings, or even short-distance adventures. The removable battery design allows for convenient and flexible charging, keeping your exploration journey going non-stop.
Freely switch speed modes via LCD display to match different road conditions:
• Gear 1: Max 15 mph —‑ Smooth & safe low‑speed mode for crowded streets & beginner riders
• Gear 2: Max 20 mph —‑ Balanced speed for daily commuting, better battery‑saving performance
• Gear 3: Max 28 mph —‑ Full‑power high‑speed mode for open‑road cruising
【Master Any Terrain】The Electric bike with 20"x4.0" ultra-wide fat tires, it offers unparalleled traction and stability. Whether on urban paved roads, forest trails, soft sandy beaches, wet snowy terrain, or muddy dirt roads, The electric dirt bike handles them all with ease. The front and rear suspension system effectively absorbs bumps, ensuring a comfortable riding experience. The front and rear dual disc brakes provide powerful and linear braking force, ensuring safe stopping in all weather conditions.
【Ride Smart, Ride Easy】The clear and intelligent LCD display is your riding commander. It displays real-time speed, precise battery level, total mileage, and single-trip mileage, keeping you fully informed about the vehicle's status. Easily switch between multiple power-assist modes—all information is at your fingertips, making your ride smarter, safer, and more convenient.
【Designed for Comfort & Convenience】The ergonomic leather seat provides excellent support and comfort for long-distance riding. Convenient bottle holders and large storage bags keep your water bottle and personal items secure and within reach. Powerful LED headlights illuminate the darkness ahead, while prominent signal lights significantly enhance visibility and safety in nighttime and low-light conditions, ensuring safe nighttime riding. A free air pump is included, allowing you to maintain tire pressure at any time and ensure optimal riding performance.
【Ride with Confidence】The Electric mountain bike has a strict UL2849 test report, providing industry-recognized safety assurance. The vehicle is 85% pre-assembled, significantly simplifying your installation process. We offer clear and easy-to-understand installation and usage video guides, as well as a professional and reliable customer support team to answer your questions and resolve any concerns.
