HKM-392339
King Kong Folding Electric Bike
A portable 1500W powerhouse with fat-tire capability and precision engineering—built for riders who demand uncompromising performance in a foldable frame.
⚡ 1500W Motor
🔋 48V 36Ah Battery
🚲 7-Speed Gear
🛡 Hydraulic Brakes
📦 Foldable
Engineered for Every Terrain
1500W Rear Hub Motor
Delivers robust torque for rapid acceleration and confident hill climbing. Reaches speeds up to approximately 31 mph (50 km/h) with remarkable efficiency.
48V 36Ah Integrated Lithium Battery
Extended range exceeding 37 miles (60 km) on a single charge. Rapid recharge in just over 3 hours minimizes downtime between rides.
20-Inch Fat Tires
Oversized 20-inch fat tires deliver superior traction and shock absorption across pavement, gravel, sand, and light snow—stability redefined.
Hydraulic Disc Brakes
Front and rear hydraulic disc brakes deliver precise, fade-resistant stopping power in wet or dry conditions—your safety is non-negotiable.
Power That Moves You
At the heart of the HKM-392339 lies a high-torque 1500W rear hub motor—a propulsion system engineered to transform every ride into an exhilarating experience. Hub motors offer distinct advantages over mid-drive alternatives: fewer moving parts, reduced chain wear, and a quieter, more refined operation. The rear placement ensures optimal weight distribution during acceleration, mimicking the feel of a premium electric vehicle.
1500W Rear Hub Motor ~2.0 hp
Generating approximately 2.0 horsepower (1500W), this motor propels you to speeds between 19–31 mph (30–50 km/h). The rear hub configuration channels power directly to the wheel, minimizing drivetrain losses. Whether you are accelerating from a standstill at a traffic light or maintaining momentum on a rolling countryside road, the motor responds with smooth, linear power delivery that inspires confidence.
Hub motors are celebrated for their durability and low maintenance requirements. With no belts, chains, or gears inside the motor housing, the sealed unit resists dust, moisture, and debris—extending service life significantly compared to exposed drivetrain components.
Torque Output: 37–44 lb-ft (50–60 Nm)
Torque is the true measure of an electric bike's capability on inclines and uneven terrain. With 37–44 lb-ft (50–60 Nm) of torque on tap, the King Kong conquers steep grades without hesitation. This torque band sits in the sweet spot for urban and light off-road riding—enough grunt to tackle hills confidently, yet refined enough for smooth stop-and-go commuting.
Endurance Meets Efficiency
Range anxiety has no place in the electric biking revolution. The HKM-392339 addresses this with a generously sized 48V 36Ah lithium battery—one of the largest capacities available in a folding e-bike. Lithium-ion technology offers superior energy density compared to older lead-acid or nickel-based chemistries, meaning more range in a lighter, more compact package.
48V 36Ah Integrated Battery
The 48-volt architecture ensures efficient power delivery to the 1500W motor, while the 36Ah capacity translates to a total energy reserve of approximately 1,728 watt-hours. This substantial energy bank supports rides exceeding 37 miles (60 km) under typical mixed-terrain conditions. For urban commuters, this could mean multiple days of riding between charges.
Fast Charging: Just Over 3 Hours
Time is precious. The high-efficiency charger replenishes the 36Ah battery in just over 3 hours—significantly faster than many competitors in this capacity class. Plug in during a lunch break or while at work, and you are ready to ride again before you know it. The integrated battery design protects cells from the elements while maintaining a clean, streamlined aesthetic.
Portability Without Compromise
Folding electric bikes have historically forced riders to choose between portability and power. The King Kong shatters that convention. The precision-engineered folding mechanism allows the bike to collapse into a significantly reduced footprint, making it practical for apartment dwellers, RV enthusiasts, boat owners, and commuters who need to store their bike in an office or car trunk.
Quick-Fold Mechanism
The intuitive folding system reduces setup and breakdown to seconds. A reinforced hinge point ensures long-term structural integrity without adding unnecessary weight.
Compact Storage
Folded dimensions make it easy to slide into tight spaces—under a desk, into a closet, or inside most vehicle trunks—without sacrificing the riding capabilities of a full-size e-bike.
Adaptive Gearing for Every Ride
The 7-speed gear system provides a versatile range of ratios, enabling you to fine-tune your pedaling effort to match the terrain. From flat urban streets to rolling hills, the right gear is always at your fingertips. Combined with the motor's assist, you can choose to cruise effortlessly or engage in a more active, fitness-oriented ride.
7-Speed Precision Drivetrain
Seven distinct gear ratios allow seamless transitions between high-cadence climbing and high-speed cruising. The derailleur system is tuned for crisp, reliable shifts—each click of the shifter delivers an immediate response. This level of control is invaluable when navigating mixed-terrain routes where conditions change rapidly.
20-Inch Fat Tires: Traction & Comfort
Fat tires are not merely an aesthetic choice—they fundamentally alter the riding experience. The generous contact patch distributes weight more evenly, reducing ground pressure and preventing sinking on soft surfaces like sand or mud. Meanwhile, the increased air volume acts as a natural suspension system, absorbing vibrations from rough pavement, gravel paths, and uneven trails.
Oversized Contact Patch
The wide-profile 20-inch tires create a larger footprint than standard bicycle tires, dramatically improving grip on loose or slippery surfaces. Riders experience a planted, stable feel that encourages exploration beyond paved roads—gravel paths, packed dirt trails, and even hard-packed sand become accessible.
Natural Shock Absorption
Fat tires operate at lower air pressures than narrow tires, allowing them to deform and conform to surface irregularities. This inherent compliance smooths out bumps and vibrations before they reach the rider—reducing fatigue on longer journeys and enhancing overall comfort without the added weight of complex suspension systems.
Braking Confidence in All Conditions
Hydraulic disc brakes represent the gold standard in bicycle braking technology. Unlike mechanical disc brakes that rely on a cable-pull system, hydraulic brakes use fluid to transmit force from the lever to the caliper. This results in more consistent pad contact, superior modulation, and significantly less hand fatigue during prolonged descents.
Front & Rear Hydraulic Disc Brakes
Both wheels are equipped with hydraulic disc brake systems, providing balanced, powerful stopping force. The sealed hydraulic lines are virtually maintenance-free, resisting contamination from dirt and water. In wet conditions—where rim brakes can become dangerously ineffective—hydraulic discs maintain consistent performance, giving you the confidence to ride year-round.
Lightweight Strength: Aluminum Alloy Construction
The frame is the soul of any bicycle, and the HKM-392339 employs a meticulously engineered aluminum alloy chassis. Aluminum offers an exceptional strength-to-weight ratio, resisting corrosion while keeping the overall weight manageable for a folding e-bike in this power class. The frame's geometry has been optimized for both riding comfort and folded compactness.
Durable Aluminum Alloy Frame
Engineered to withstand the rigors of daily use, the aluminum alloy frame delivers a responsive yet forgiving ride quality. Its inherent corrosion resistance ensures that the bike maintains its structural integrity and appearance even after exposure to rain, road salt, or coastal humidity. The folding hinge is reinforced to handle the additional stresses of a 1500W powertrain.
Ride Anywhere, Anytime
Urban Commuting
Fold it at the office, store it under your desk, and bypass traffic on the way home. The King Kong transforms the daily grind into a highlight of your day.
Weekend Adventures
Load it into your vehicle, drive to a scenic trailhead, and explore off the beaten path. Fat tires and ample torque make light work of dirt, gravel, and gentle slopes.
Technical Specifications
Every detail of the HKM-392339 has been considered. Below is a comprehensive overview of its key specifications.
Motor Power
1500W (~2.0 hp)
Motor Type
Rear Hub
Battery
48V 36Ah Lithium
Range
37+ miles (60+ km)
Top Speed
~19–31 mph (30–50 km/h)
Charge Time
Just over 3 hours
Torque
37–44 lb-ft (50–60 Nm)
Gear System
7-Speed
Tire Size
20-inch Fat Tires
Brakes
Hydraulic Disc (F&R)
Frame Material
Aluminum Alloy
Design
Foldable / Portable
Frequently Asked Questions
What is the actual range I can expect on a full charge?
Range varies based on rider weight, terrain, assist level, and riding style. Under typical mixed conditions with moderate pedal assist, riders can expect to exceed 37 miles (60 km). On flat terrain at lower assist levels, range can extend significantly further. The 48V 36Ah battery provides one of the largest energy reserves in the folding e-bike category.
How does the folding mechanism work?
The King Kong features a reinforced central hinge point that allows the frame to fold in seconds. The stem and handlebars also collapse for a more compact profile. No tools are required—simply release the secure locking mechanism, fold, and you are ready to store or transport the bike. The folded dimensions fit comfortably in most car trunks, closets, and under-desk spaces.
Is the battery removable for charging?
The battery is integrated into the frame for a clean aesthetic and enhanced protection against the elements. Charging is accomplished via a dedicated port on the frame, meaning you can charge the bike directly without removing the battery. This integrated design also deters theft and reduces wear on connectors.
What type of terrain can the fat tires handle?
The 20-inch fat tires are designed for versatility. They perform excellently on paved roads, bike lanes, gravel paths, hard-packed dirt trails, and even light sand or snow. The wide contact patch provides stability and traction that narrow tires simply cannot match. While not a dedicated off-road machine, the King Kong confidently handles far more than standard urban e-bikes.
How does the hydraulic disc brake system compare to mechanical brakes?
Hydraulic disc brakes offer several advantages over mechanical (cable-actuated) disc brakes. They provide more consistent pad contact, superior modulation for precise speed control, and significantly less hand fatigue. The sealed hydraulic system is also more resistant to contamination from dirt, water, and debris—resulting in lower maintenance and longer service intervals.
What is the advantage of a rear hub motor over a mid-drive system?
Rear hub motors excel in simplicity and durability. With fewer moving parts than mid-drive systems, they impose less wear on the chain and drivetrain components. Hub motors are sealed units, protecting them from the elements. They also deliver power directly to the wheel, providing a smooth, push-like sensation that many riders find intuitive and enjoyable.
How much does the bike weigh?
Given the robust 1500W motor, large 48V 36Ah battery, and durable aluminum alloy frame, the King Kong achieves a competitive weight for its class. The folding design and fat tires add some mass compared to ultralight road bikes, but the trade-off is exceptional versatility, power, and ride comfort that lighter e-bikes cannot deliver.
Can the speed be limited for local regulations?
Yes. The bike's control system allows for speed limiting to comply with local e-bike regulations. Riders should familiarize themselves with applicable laws in their region regarding electric bicycle speed limits and classification. The King Kong's top speed capability of approximately 19–31 mph (30–50 km/h) can be electronically governed as needed.
Purchase with Confidence
Every HKM-392339 is backed by comprehensive coverage designed to protect your investment.
Free Shipping
Complimentary shipping on all orders. Your King Kong arrives at your doorstep with no additional cost.
180-Day Purchase Protection
Extended coverage ensures your bike is protected against manufacturing defects for a full 180 days from the date of purchase.
30-Day Money-Back Guarantee
Not satisfied? Return your bike within 30 days for a full refund. Your satisfaction is our priority.
24-Month Warranty
Comprehensive warranty coverage for 24 months. Ride with the assurance that your investment is fully protected.
HKM-392339 · King Kong · Portable 1500W 48V Fat Tire Folding Electric Bike
Nationwide Service Network & Support
With over 3,000 authorized service centers across the United States, we ensure comprehensive after-sales support for your vehicle, giving you complete peace of mind.
We understand that maintenance needs may arise. When you purchase from us, you gain access to our unparalleled service ecosystem designed for maximum convenience and reliability.
1. DIY Repair & Parts Replacement:
For minor repairs or part replacements that can be handled personally, we provide cost-price genuine parts during the warranty period. Each order is accompanied by clear, step-by-step video tutorials to guide you through the self-repair process seamlessly.
2. Professional Servicing:
For issues requiring expert attention, simply contact our support team. We will locate the nearest authorized service center based on your order and location details. You only need to bring your vehicle to the designated center. Once servicing is complete, we will notify you for pickup. All repairs are free during the warranty period; afterward, only cost-based fees apply.
Rest assured—wherever you are, our extensive partner network is ready to keep your ride running smoothly.
Lifetime Limited Powertrain Warranty & Wrap Program
For added long-term security, our Lifetime Limited Powertrain Warranty and Lifetime Wrap Program provide continued mechanical breakdown coverage for as long as you own your vehicle—with no term or mileage restrictions.
Every product on Hekomart.com is expertly curated from thousands, quality tested, and lifestyle approved. Elevate your everyday.
Express Delivery Priority - Where Speed Meets Satisfaction
At Hekomart.com, we understand the anticipation that comes with every online order. While most platforms rely on standard economy shipping, we prioritize your excitement by strategically selecting premium express carriers to accelerate deliveries. Our intelligent logistics system analyzes real-time data to optimize routes, partnering with globally-recognized couriers like DHL, FedEx, and UPS to ensure 30% faster doorstep arrivals* than industry averages.
Every package receives 24/7 tracking visibility and proactive delivery updates, transforming waiting time into confidence. For time-sensitive purchases, our "Expedited Service Guarantee" offers optional priority handling at no extra cost, because your satisfaction isn't just a goal – it's the core of our delivery DNA.
*Based on internal 2025 data comparing standard shipping durations across major platforms. Delivery times vary by destination and customs procedures.
Credit Card 180 Days Purchase Protection
The 180 Days Purchase Protection protects the buyer if an item purchased has not been shipped or if a shipped item is significantly not as described by the seller. The 180 Days Purchase Protection covers all purchases and payments made through our website. We accept Visa, Master Card, American Express, and Discover Card. If you don't receive the item that you ordered, or it shows up significantly different from its description, you may qualify for Purchase Protection, and we'll reimburse you for the full purchase price plus any original shipping costs, subject to terms and limitations. If you are charged for a transaction that you didn't make, let us know within 60 days, and we've got you covered.
30 Days Money-Back Guarantee
We are confident that our products are of great quality and even better value. However, if upon receiving and inspecting your item you decide that you want to return it, you will have 30 days as of the date of shipment arrival to return it for a refund minus the shipping cost. No restocking charges. Any additional fees associated with a purchase transaction will be deducted from the amount of the refund.
24-Month Extended Warranty Service
If you purchase products from our website, you have 24 months to request repairs or replacement if any products turns out to be faulty or are not as advertised. During the warranty period if any product is found to have a manufacturer defect, we will repair or replace the defective part(s). If a product cannot be repaired or replaced within a reasonable time, you can request a refund or price reduction. We are confident that our products are of great quality and even better value. However, if upon receiving and inspecting your item you decide that you want to return it, you will have 30 days as of the date of shipment arrival to return it for a refund minus the shipping cost.
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