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Foldable Electric Bike for Adults | 48V 25MPH | 20" x 3.0" Fat Tire

Regular price
$555.00
Regular price
$792.00
Sale price
$555.00
Color — Black
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

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    Foldable Electric Bike for Adults – 48V Power, 25 MPH Speed, 20" Fat Tires

    Your Everyday Ride for the American City: Powerful, Portable, and Practical

    Life in the U.S. moves fast. Whether you're in New York, Chicago, Austin, or Seattle, you know the struggle: traffic jams, expensive parking, crowded subways, and no space to store a full-sized bike. This foldable e-bike solves all of that.

    Who is this for?

    • Apartment dwellers with no garage or storage closet

    • Commuters combining biking with buses, trains, or ride-shares

    • College students needing to get across campus quickly

    • RV and van-life enthusiasts who want a compact vehicle

    • Seniors looking for a stable, easy-to-ride electric bike

    What problems does it solve?

    • No parking? Fold it and bring it inside.

    • Hills too steep? The 1200W peak motor handles slopes up to 15%.

    • Bike theft worries? Hidden battery and foldable frame make it less of a target.

    • Rough roads? 3-inch fat tires smooth out potholes, cracks, and gravel.

    • No time to charge? 5.5 hours to full, or top it up while you work.

    This is the bike that fits your real life—not the other way around.


    How It Performs: Built for American Streets and Trails

    Motor & Power – Small Frame, Serious Muscle
    Rated at 500W with a 1200W peak, this motor pulls hard when you need it most. That extra power kicks in at stoplights, on steep hills, or when you need to accelerate into traffic. Top speed: 25 mph. That’s fast enough to keep up with city traffic but legal on most U.S. bike paths and roads.

    Tires – 20" x 3.0" Fat Tires
    These are not skinny road tires. At 3 inches wide, they give you stability on loose gravel, wet pavement, or cracked asphalt. Puncture-resistant means fewer flats. You’ll feel confident leaning into turns and rolling over streetcar tracks or tree roots.

    Battery – Hidden 48V/10.4Ah Lithium-Ion
    Fully integrated into the frame. No bulky external battery to remove or lose. Charge it on the bike. Range: up to 29 miles using pedal assist, or 20 miles on throttle-only. Perfect for a round-trip commute or a day of errands.

    Brakes and Lights – Mechanical Disc Brakes + Full LED Package
    Stop safely in rain or shine. The front LED headlight lights your path at night. The rear light keeps you visible to drivers. The handlebar display shows your speed, battery level, and assist mode.

    Frame – High-Carbon Steel, Quick-Fold Design
    Strong enough for daily use. Folds in seconds without tools. Once folded, it fits under a desk, in a closet, or in the trunk of a sedan.


    How This E-Bike Compares to Other Foldable Bikes on the U.S. Market



    Feature This Foldable E-Bike Typical Competitors (8001200)
    Peak Motor Power 1200W 500W–750W
    Top Speed 25 mph 18–20 mph
    Tire Width 3.0 inches 1.95–2.4 inches
    Battery Integration Hidden inside frame Bolt-on, external
    Charge Time 5.5 hours 6–8 hours
    Weight When Folded ~52 lbs ~40–60 lbs (similar)
    Warranty 360 days 90–180 days typical
    Assembly Required 10% (pedals, seat, handlebars) 30–50% often

    Key advantages you won’t find in most budget foldable e-bikes:

    • True 25 mph top speed (many cap at 20 mph)

    • 1200W peak power for real hill climbing

    • Fat tires as standard, not an upgrade

    • Fully hidden battery for cleaner looks and theft deterrence

    • Longer warranty (360 days vs. industry average of 1 year or less)


    Common Questions from American Riders

    Q: Is this bike legal to ride on bike paths and roads in the U.S.?
    A: Yes. The motor is 500W rated with a 25 mph top speed. In most states, this qualifies as a Class 3 e-bike, which is allowed on roads and bike lanes unless local rules say otherwise. Always check your local laws, but the vast majority of U.S. cities accept Class 3 bikes on streets and paved paths.

    Q: How hard is it to fold and carry?
    A: Folding takes about 15 seconds after you practice a few times. The bike weighs around 52 pounds. You won't want to carry it for miles, but it’s easy to lift into a car trunk, carry up a few stairs, or roll while folded on its built-in rollers.

    Q: Can I ride it in the rain?
    A: Yes. The battery and electrical system are weather-sealed. You can ride in light to moderate rain. Avoid submerging it or riding through deep puddles where water covers the motor or battery housing.

    Q: How tall of a rider does this fit?
    A: The adjustable seat and handlebars fit riders from about 5'2" to 6'4". The step-through design also makes it easy to mount and dismount.

    Q: Does it come with a charger and tools?
    A: Yes. You get a charger, basic assembly tools, pedals, seat, and handlebars. The bike is 90% assembled in the box. Most people finish setup in under an hour using the included manual or video guide.

    Q: What if something breaks or doesn’t work?
    A: You have a 360-day warranty. Contact support by email. Common replacement parts (brake pads, tubes, display) are available. The company is based in the U.S. and responds within 1–2 business days.

    Q: Can I add a rear rack or fenders?
    A: Yes. The frame has standard mounting points for a rear rack and fenders. Many riders add a milk crate or pannier bags for groceries or a work bag.

    Q: How often do I need to maintain it?
    A: Basic maintenance every 200–300 miles: check tire pressure (12–20 PSI recommended), tighten bolts, clean the chain, and check brake pads. Like any bike, it lasts longer with regular care.


    Real Customer Reviews from Across the United States

    "I live in a walk-up in Brooklyn. This bike changed everything."
    – Jessica M., New York, NY
    I don't have a garage or even a hallway to store a bike. This folds up and sits next to my shoe rack. I ride across the Brooklyn Bridge to work every day. The fat tires make the bridge's wooden slats feel smooth. Best purchase of the year.

    "Finally, an e-bike that climbs Seattle hills without dying."
    – David T., Seattle, WA
    *My old e-bike would slow to 8 mph on the hill to my house. This one cruises up at 15 mph with pedal assist. The 1200W peak is real. Battery lasts me three days of commuting. Love the hidden look too.*

    "Perfect for my RV trips. I take it everywhere."
    – Linda R., Phoenix, AZ
    We have a Class C motorhome. This bike folds into the storage bay. I use it to explore campgrounds and ride into small towns. The 20" fat tires handle desert sand and gravel really well. Already bought a second one for my husband.

    "I was skeptical about foldable bikes. Not anymore."
    – Marcus W., Chicago, IL
    I'm 6'3" and 240 lbs. Most foldable bikes feel like toys. This one feels solid. The disc brakes stop hard when a taxi cuts you off. The display is easy to read in sunlight. Assembly took 40 minutes while watching the video.

    "My college campus is huge. This saves me 45 minutes a day."
    – Sophia L., Austin, TX
    *From my off-campus apartment to my engineering building is 2.5 miles. I used to walk or wait for the shuttle. Now I ride this in 12 minutes. I fold it and bring it into my classroom. No bike rack theft worries.*

    "Bought for my 16-year-old to get to his job. He rides it daily."
    – Kevin P., Denver, CO
    He works at a grocery store 3 miles away. The throttle mode means he doesn't show up sweaty. He locks it in the back stockroom because it folds. After 4 months of daily use, no issues at all.

    "The 25 mph top speed is no joke. Keep up with traffic easily."
    – Rachel S., Los Angeles, CA
    I take side streets to avoid the 405 madness. This bike lets me keep pace with cars at 25 mph without feeling rushed. The lights are bright enough for night riding. Charger is compact—I keep one at home and one at my desk.

    "I'm 68 years old. The step-through frame and fat tires make me feel safe."
    – Bill H., Sarasota, FL
    I don't have the balance I used to. These wide tires give me so much confidence. The pedal assist helps my knees. I ride to the farmers market every Saturday. Folds into my condo closet.

    "Better than the Lectric XP I returned."
    – Amira K., Portland, OR
    *I tried a popular brand. The battery was external and rattled. This bike's hidden battery is much quieter. The motor engagement is smoother. And the 360-day warranty is twice as long. No regrets.*

    "Used it for food delivery in Miami. Made $200 more per week."
    – Carlos R., Miami, FL
    *I do DoorDash on this bike. The 20-mile throttle range covers my whole shift. I can park anywhere. The fat tires handle the cracked sidewalks and occasional sand. Already put 900 miles on it. Still runs like new.*


    Ready to Stop Fighting Traffic and Start Enjoying Your Ride?

    You know the feeling. Waiting in gridlock. Circling for parking. Squeezing your bike into a crowded rack. Paying for a garage spot that costs more than your bike.

    None of that happens with this foldable e-bike.

    You fold it. You carry it. You ride past the traffic. You smile.

    Here’s what you get today:

    • A 1200W peak motor that climbs any hill in your city

    • Fat 3-inch tires that smooth out rough roads

    • A hidden 48V battery with up to 29 miles of range

    • Full lights, disc brakes, and an easy-to-read display

    • A foldable steel frame that fits anywhere

    • 360 days of warranty coverage

    • Free assembly video and tool kit

    No more excuses. No more delays. The bike that fits your American city life is ready to ship.

    Click the button below. Add to cart. Start riding next week.

    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)