HKM-841491 20″ Full Suspension Electric Fat Tire Mountain Bike
Engineered for riders who demand uncompromising performance across pavement, gravel, and singletrack — the HKM-841491 combines a high‑torque 1500W brushless motor, full suspension, and monster fat tires to redefine what an electric mountain bike can be.
1500W Brushless Motor
Peak power delivery propels you to 22–28 mph (35–45 km/h) with relentless acceleration.
Long‑Range Lithium Battery
31–37 miles (50–60 km) per charge. Recharges in ~3.25 hours. Down‑tube integration for balance.
Dual Suspension System
Front fork and rear shock absorb roots, rocks, and potholes for a plush, controlled ride.
20″ x 4.0″ Fat Tires
Massive contact patch delivers supreme traction on sand, snow, mud, and loose gravel.
Hydraulic Disc Brakes
Progressive, fade‑resistant stopping power in wet or dry conditions keeps you in control.
Shimano 7‑Speed
Crisp, reliable gear changes adapt to steep climbs and fast descents.
Motor & Power Delivery
At the heart of the HKM-841491 lies a 1500W high‑efficiency brushless hub motor. Engineered with neodymium magnets and a sinusoidal controller, it generates instant torque while maintaining exceptional energy efficiency. Throttle response is refined — no sudden surges, just predictable, linear acceleration that inspires confidence on technical terrain. Riders can reach a top assisted speed of approximately 28 mph (45 km/h) depending on conditions, making it suitable for both commuting and trail exploration. The motor’s sealed construction protects against dust and moisture, ensuring longevity even in challenging environments.
The controller intelligently modulates output based on cadence and load, preventing overheating and extending component life. Whether climbing a 15% grade or cruising on flat ground, the motor seamlessly delivers up to 80 Nm of torque (estimated). Three selectable power modes let you tailor assistance to your preference: Eco for extended range, Normal for balanced performance, and Sport for maximum exhilaration.
Performance Snapshot
• Peak output: 1500 W
• Top speed: 22–28 mph (35–45 km/h)
• Torque: ~80 Nm
• IP54 weather resistance
• Peak output: 1500 W
• Top speed: 22–28 mph (35–45 km/h)
• Torque: ~80 Nm
• IP54 weather resistance
Battery & Range Intelligence
The removable lithium‑ion battery pack is seamlessly integrated into the down tube, lowering the center of gravity for improved handling. With a capacity that translates to 31–37 miles (50–60 km) under typical mixed riding, it covers daily commutes and weekend adventures without range anxiety. Actual range varies with rider weight, terrain, power mode, and ambient temperature. The smart battery management system (BMS) safeguards against overcharge, over-discharge, and short circuits, prolonging cell life well beyond 800 charge cycles.
Recharging is quick: from empty, the included 3A fast charger replenishes the battery to 100% in approximately 3 hours and 15 minutes. The battery lock mechanism is anti-theft, and an LED indicator on the pack shows remaining capacity at a glance.
Battery Highlights
• Typical range: 31–37 mi (50–60 km)
• Charge time: ~3.25 h (0–100%)
• BMS protection
• Lockable, removable pack
• Typical range: 31–37 mi (50–60 km)
• Charge time: ~3.25 h (0–100%)
• BMS protection
• Lockable, removable pack
Full Suspension Dynamics
The HKM-841491 is built around a robust full‑suspension chassis, pairing an adjustable front fork with a rear coil‑over shock. Together, they absorb high‑frequency chatter and big hits alike, reducing rider fatigue and increasing traction. The front suspension offers approximately 80 mm of travel, while the rear linkage delivers progressive damping to prevent bottom‑out on harsh landings. Whether you’re rolling over roots or dropping off curbs, the system keeps the wheels planted.
The suspension geometry is tuned for a balanced ride: anti‑squat characteristics maintain efficiency under power, while the plush initial stroke irons out small bumps. Adjustable preload on the rear shock lets riders dial in sag based on their weight (within the recommended payload). This level of control elevates confidence on descents and comfort on long days in the saddle.
Fat Tire Traction & Stability
Mounted on double‑wall alloy rims, the 20 x 4.0‑inch knobby tires define the bike’s go‑anywhere character. The voluminous casing allows extremely low air pressures (as low as 5 PSI) for a self‑smoothing ride and unmatched floatation over soft surfaces like sand or snow. On hardpack and pavement, the large contact patch enhances cornering grip and braking effectiveness.
The aggressive tread pattern features siped center knobs for low rolling resistance and deep shoulder lugs for lateral bite. Puncture‑resistant layers beneath the tread reduce the risk of flats from thorns or sharp rocks. Combined with the 20‑inch wheel diameter, the tires strike an ideal balance between agility and rollover capability.
High‑Carbon Steel Frame & Payload
The frame is fabricated from high‑carbon steel, selected for its superior strength‑to‑weight characteristics and natural vibration damping. Despite the robust build, the complete bike weighs 81.6 lbs (37 kg), which is competitive for a full‑suspension fat‑tire e‑bike. The design supports a maximum recommended payload of 97 lbs (44 kg) — covering rider and essential gear — while maintaining structural integrity and stable handling.
Welds are smooth and reinforced at stress points. The frame geometry places the rider in a confident upright position, reducing strain on the back and shoulders during extended rides. Internal cable routing preserves the clean aesthetic and shields cables from snags.
Braking Confidence
Hydraulic disc brakes with 180 mm rotors front and rear provide authoritative stopping power with minimal lever effort. The sealed hydraulic system self‑adjusts for pad wear and resists contamination, ensuring consistent performance in rain, mud, or dust. Modulation is precise, allowing riders to feather the brakes on loose descents without locking the wheels.
The brake levers are ergonomically shaped and include a motor cutoff switch that instantly disengages power when braking, adding a layer of safety. Combined with the fat tires’ grip, the braking distance from 20 mph (32 km/h) to zero is significantly shorter than typical mechanical disc setups.
Shimano 7‑Speed Drivetrain
The Shimano 7‑speed rear derailleur and thumb shifter provide crisp, reliable gear changes across a wide 14‑28T cassette. Paired with the motor’s assistance, you can spin comfortably on steep inclines or push higher cadences on flats. The drivetrain is known for its durability and low maintenance, a perfect match for the rugged personality of the bike.
Technical Specifications
Why the HKM-841491 Stands Apart
True All‑Terrain Versatility
Unlike standard e‑bikes, the fat tire + full suspension combo lets you transition from city bike lanes to forest trails without compromise.
High‑Strength Steel Frame
High‑carbon steel offers natural flex for comfort and toughness that surpasses many aluminum frames in fatigue life.
Intuitive Power Modes
Easily switch between Eco, Normal, and Sport modes to balance range and performance on the fly.
Frequently Asked Questions
What is the actual range on a single charge?
Range typically varies from 31 to 37 miles (50–60 km) depending on rider weight, terrain, assist level, and weather conditions. Using Eco mode on flat ground can extend range beyond 40 miles.
How long does the battery take to charge fully?
A full charge from empty takes approximately 3 hours and 15 minutes using the supplied 3A fast charger.
Is the battery removable?
Yes, the lithium‑ion pack is removable and lockable, making it convenient for off‑bike charging or security.
What is the weight limit for riders?
The recommended maximum payload (rider + gear) is 97 lbs (44 kg) to ensure optimal handling and structural longevity.
Does the bike have pedal‑assist and throttle?
Yes, it supports both pedal‑assist (with cadence sensor) and a thumb throttle, giving you full control over how much effort you want to exert.
Customer Assurance
Free Shipping
On all orders, no minimum.
180‑Day Purchase Protection
Extended peace of mind.
30‑Day Money‑Back Guarantee
Ride it, love it or return it.
24‑Month Warranty
Comprehensive coverage for your ride.
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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