• QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 1
  • QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 12
  • QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 13
  • QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 14
  • QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 15
  • QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 16
  • QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 17
  • QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 18
  • QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 19
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QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified

$599.00
$951.00
$599.00
Local Warehouse

    2-7 day Delivery

    We currently offer free shipping to all U.S. states, excluding Hawaii, Alaska, and Puerto Rico.

    In-stock orders are generally shipped within 2 business days, unless otherwise noted on the product page. Once shipped, orders typically arrive within 2–7 business days. ( We CAN NOT ship to PO BOXES or APO.) 

    In rare cases where an order cannot be shipped within 5 business days, we will notify you promptly.

    14-day Easy Return

    We offer a 14-day return window, allowing you to request a return within 14 days after receiving your order.
    For more details, please visit our Refund Policy.

    12-month Warranty

    All scooters/bikes come with a 1-year manufacturer's warranty for the original owner, covering manufacturing defects. 

    This warranty does not cover damage caused by accidents, water exposure, or misuse.

    For full details, please visit our Warranty Page

    UL2849 Certified E-Bike

    UL2849 Certified E-Bike refers to an electric bike that has passed UL 2849 safety standards, covering the electrical drive train system—including battery, charger, and motor. This certification ensures protection against fire, electric shock, and other hazards, making the e-bike compliant with North American safety regulations. 

    The HR-BK20 model, marketed under the brands RONZLLA, Rooder, QNUT, and HAPPYRUN, successfully passed UL 2849 safety standards on Feb 12th, 2026. This certification confirms that the e-bike's entire electrical system (battery, charger, and motor) meets rigorous North American requirements for protection against fire, electric shock, and other potential hazards.

    E-Bike Spare Parts Availabe

    We supply a full range of reliable e-bike spare parts—from frames, forks, and hub motors to batteries, controllers, displays, brakes, sensors, wheels, and all essential components listed below.

    With comprehensive after-sales support, we ensure quick sourcing, compatibility, and long-term availability. Order with confidence—your worry‑free after‑service is our promise.

    Parts we offer:

    • Frame 

    • Rigid Fork

    • Front & Rear Wheels

    • Hub Motor

    • Lithium-Ion Battery

    • Standard eBike Controller

    • LCD/LED Display

    • Thumb/Twist Throttle

    • Magnetic PAS

    • Brake Levers (cutoff switch)

    • Mechanical Disc Brakes (set)

    • Rear Derailleur, Cassette, Chain, Shift Lever

    • Bottom Bracket, Crankset, Pedals

    • Seatpost, Saddle, Handlebars, Grips

    • Headset, Stem

    • Front & Rear LED Lights

    • Full Fenders, Kickstand, Wiring Harness

    Your reliable partner for quality spares & peace of mind.

    eBike Sales & Service – Nearby

    Electric Bike BK20 Local Warehouse in USA

    GA001 (US East Warehouse Address)
    Contact: Big Max LLC
    Warehouse Address: 320 Morgan Lakes Industrial Blvd. Unit D04, Pooler GA. 31322
    Working Hours: Monday to Friday; 9 AM - 5 PM

    GA001 Ebike - We Are Near You:

    Distance (miles) ZIP Code City State
    0.00 31322 Pooler GA
    3.93 31408 Savannah GA
    5.91 31405 Savannah GA
    5.93 31418 Savannah GA
    6.02 31302 Bloomingdale GA
    6.59 31415 Savannah GA
    7.27 31409 Savannah GA
    7.29 31407 Port Wentworth GA
    7.62 31419 Savannah GA
    8.48 31318 Meldrim GA
    8.78

    31402 / 31403

    / 31420 / 31416

    / 31412 / 31414

    		 Savannah GA
    8.82 31421 Savannah GA
    10.25 31401 Savannah GA
    10.64 31307 Eden GA
    12.11 31404 Savannah GA
    12.66 31406 Savannah GA
    14.35 31326 Rincon GA
    15.98 31308 Ellabell GA
    16.08 31324 Richmond Hill GA
    17.10 31411 Savannah GA
    17.57 29927 Hardeeville SC
    18.03 31410 Savannah GA
    18.72 31309 Fleming GA
    19.80 31312 Guyton GA
    21.82 31331 Townsend GA
    22.40 31328 Tybee Island GA
    22.83 29935 Ridgeland SC
    25.30 31313 Hinesville GA
    25.31 31329 Springfield GA
    26.44 31303 Clyo GA
    27.27 29945 Levy SC
    28.03 31323 Ludowici GA
    28.38 31316 Pembroke GA
    28.54 29909 Okatie SC
    29.98 29915 Daufuskie Island SC
    30.44 29940 Tillman SC
    30.69 29936 Rincon SC
    31.85 29945 Garnett SC
    32.20 29910 Bluffton SC
    32.91 29938 Pineland SC
    33.19 29902 Beaufort SC
    33.19 29903 Beaufort SC
    33.19 29904 Beaufort SC
    34.52 29907 Beaufort SC
    35.28 29924 Estill SC
    35.41 29920 St. Helena Island SC
    35.60 29944 Varnville SC
    36.58 29911 Brunson SC
    37.03 31315 Fort Stewart GA
    37.48 29918 Fairfax SC
    37.48 29921 Gifford SC
    38.04 29932 Miley SC
    38.04 29939 Scotia SC
    38.25 29926 Hilton Head Island SC
    38.29 29928 Hilton Head Island SC
    38.39 29941 Sycamore SC
    39.25 31321 Midway GA
    39.77 31305 Darien GA
    40.03 29914 Coosawhatchie SC
    40.71 29943 Ulmer SC
    41.14 29906 Sheldon SC
    42.37 29916 Early Branch SC
    42.37 29922 Grays SC
    42.37 29931 Luray SC
    42.37 29942 Tarboro SC
    43.18 29929 Islandton SC
    43.48 29912 Clyo SC
    43.48 29913 Crocketville SC
    43.74 29923 Hampton SC
    44.08 29908 Brunson SC
    44.34 31320 Riceboro GA
    45.51 31310 Glennville GA
    46.14 29901 Beaufort SC
    47.13 29945 Garnett SC
    47.95 30474 Claxton GA
    48.11 29905 Beaufort SC
    48.15 29934 Luray SC
    48.91 30425 Daisy GA
    49.32 31314 Richmond Hill GA
    49.70 30415 Bellville GA
    49.95 31304 Crescent GA
    49.97 30411 Ailey GA

     

    CA002 Warehouse (US West Warehouse Address)
    Contact: Mary-1059
    Address: 9448 Richmond Pl unit B Rancho Cucamonga CA 91730
    Working Hours: 09:00 - 17:00, Monday to Friday

    CA002 Best E-Bike for Sale - We Are Near You:

    Distance (Miles) ZIP Code City State
    0 91730 Rancho Cucamonga CA
    ~2 91701 Rancho Cucamonga CA
    ~3 91737 Rancho Cucamonga CA
    ~4 91739 Rancho Cucamonga CA
    ~6 91761 Ontario CA
    ~7 91762 Ontario CA
    ~8 91763 Montclair CA
    ~9 91710 Chino CA
    ~10 91786 Upland CA
    ~11 91784 Upland CA
    ~12 91709 Chino Hills CA
    ~13 92509 Jurupa Valley CA
    ~14 92501 Riverside CA
    ~15 92503 Riverside CA
    ~15 92505 Riverside CA
    ~16 92336 Fontana CA
    ~17 92335 Fontana CA
    ~17 92860 Norco CA
    ~18 92506 Riverside CA
    ~19 92861 Villa Park CA
    ~20 91752 Mira Loma CA
    ~20 92337 Fontana CA
    ~25 92867 Orange CA
    ~30 92869 Orange CA
    ~30 91773 San Dimas CA
    ~32 92374 Redlands CA
    ~35 92683 Westminster CA
    ~35 91740 Glendora CA
    ~38 92562 Murrieta CA
    ~40 92647 Huntington Beach CA
    ~42 92886 Yorba Linda CA
    ~45 92626 Costa Mesa CA
    ~45 92627 Costa Mesa CA
    ~45 91711 Claremont CA
    ~48 90250 Hawthorne CA
    ~48 90280 South Gate CA
    ~50 90247 Gardena CA
    ~50 90201 Bell CA
    ~50 90255 Huntington Park CA


    After-Sale Service Address in USA

    CA002 Warehouse (US West)
    Contact: Mary—1033
    Address: 9448 Richmond Pl unit B Rancho Cucamonga CA 91730
    Working Hours: 09:00—17:00, Monday to Friday

    GA001 Warehouse (US East)
    Contact: Big Max LLC—1033
    Warehouse Address: 320 Morgan Lakes Industrial Blvd. Unit D04, Pooler GA. 31322
    Working Hours: Monday to Friday; 9 AM - 5 PM

    More Details

    Customer Support

    We're happy to help! If you have any questions about our products or services, please reach out to us at:

    Email: rooder@ronzlla.com

    QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 1 QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 12 QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 13 QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 14 QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 15 QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 16 QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 17 QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 18 QNUT BK20 Fat Tire Electric Bike 48V 18A 1500W 28MPH UL2849 Certified 19

    QNUT BK20: The Ultimate 1500W Fat Tire Electric Bike Guide


    The QNUT HR-BK20 (also marketed under the RONZLLA, Rooder, and HAPPYRUN brands) is more than just an e-bike; it is a high-performance utility vehicle designed for the modern adventurer. Whether you are navigating urban potholes or conquering loose gravel trails, the BK20 delivers a seamless blend of power and durability.

    Technical Specifications: Built for Performance


    The BK20 is defined by its robust electrical system and heavy-duty components, designed to support riders up to 330 lbs.

    Feature Specification
    Motor 1500W Peak Brushless Geared Hub Motor
    Top Speed 28 MPH
    Battery 48V 18Ah Removable Lithium-Ion
    Max Range 60–90 Miles (Pedal-Assist Mode)
    Tires 20" x 4.0" Fat Tires with aggressive tread
    Braking High-response Mechanical Disc Brakes
    Gearing 7-speed Shimano-style system

    Understanding UL 2849 Certification: Your Safety First


    The QNUT BK20 is a UL 2849 Certified E-Bike, having successfully passed rigorous testing on February 12th, 2026.

    What is UL 2849?


    UL 2849 is the gold standard for electric bicycle safety in North America. Unlike basic battery tests, this certification evaluates the entire electrical drive train system, including:
    • The Battery: Testing for thermal runaway and fire hazards.
    • The Charger: Ensuring protection against electric shocks.
    • The Motor & Controller: Monitoring for overheating and electrical malfunctions.
    Choosing a UL 2849 certified bike like the BK20 ensures your equipment meets modern compliance standards, providing peace of mind during both storage and operation.

    Maintenance & Spare Parts: Long-Term Reliability


    We believe an e-bike is a long-term investment, which is why we maintain a comprehensive inventory of genuine spare parts to keep your BK20 on the road.

    Critical Parts We Stock:

    • Electronics: Replacement 48V controllers, high-resolution LCD displays, and wiring harnesses.
    • Drive Train: 1500W hub motors, 48V 18Ah lithium batteries, and thumb throttles.
    • Wear & Tear Items: 20" x 4.0" fat tires, mechanical disc brake sets, and magnetic PAS sensors.
    Our dedicated service ensures quick sourcing and guaranteed compatibility, so you never have to worry about finding the right component.

    FAQ: Frequently Asked Questions


    How does the BK20 handle hills?
    The BK20 features a peak 1500W motor paired with a dual-sensor system (speed + torque). This combination provides the torque necessary to conquer steep inclines effortlessly, while the 7-speed gearing allows you to maintain a natural pedaling cadence.
    What is the charging time?
    While the high-capacity 18Ah battery provides a massive range, it is designed for convenience. The battery is removable and lockable, allowing you to charge it indoors or at your desk using a standard power outlet. Typical charging times for a battery of this capacity range from 6 to 9 hours.
    Is it weatherproof?
    Yes. The BK20 features an IP65-rated smart color display and weather-resistant components designed to operate in temperatures ranging from -4°F to 140°F.

    Why Buy From Us?


    When you choose our shop, you aren't just buying a bike—you're gaining a partner in your adventure.
    • Fast Local Shipping: We ship from our US East (Georgia) and US West (California) warehouses, with most orders arriving within 2–7 business days.
    • Comprehensive Warranty: Every bike comes with a 1-year manufacturer’s warranty covering the frame, motor, battery, and electronic components.
    • Dedicated Post-Sale Support: Our 24/7 customer support team is available via email and WhatsApp to assist with assembly, troubleshooting, or parts sourcing.

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    Testimonials

    Bought this for my son and I steal it all the time! Very sturdy and powerful. The long battery life is a huge plus for us.

    Maya Rodriguez (San Francisco, CA)

    This scooter is a monster! The dual motors have insane power and the range is no joke. Handles my weight easily. Worth every penny!

    Jameson Carter (Boston, MA)

    Incredible speed and torque. The seat is super comfortable for long rides. Folds up nicely for storage. Highly recommend this beast!

    Madison O'Connor (Chicago, IL)

    Saves me so much on gas! The range is accurate for my 40-mile commute. Handles bumps well and the folding design is a lifesaver.

    Alexander Rossi (New York, NY)

    Finally a scooter that holds my weight! The power is amazing and it feels very stable even at top speed. Built like a tank.

    Ryan Mitchell (Los Angeles, CA)