HKM-703059
Spacewalk Electric Fat Tire Mountain Bike
A versatile 750W mid-drive electric mountain bike engineered for snow, sand, trails, and city streets — delivering up to 99 miles of range with robust all-terrain capability.
750W
Mid-Drive Motor
38–99 mi
Range (61–160 km)
19–31 mph
Top Speed (30–50 km/h)
1–3 hrs
Fast Charging
750W Central Mid-Drive Motor
The 750-watt mid-drive motor delivers superior torque directly through the crankset, offering a more natural riding feel compared to hub-drive alternatives. This central placement lowers the bike's center of gravity and optimizes weight distribution, resulting in enhanced climbing ability and precise power modulation across all 6 gears. Whether accelerating from a standstill on pavement or grinding up a rocky incline, the motor's responsive output adapts seamlessly to your pedaling cadence.
48V 15Ah Integrated Lithium Battery
The seamlessly integrated 48-volt, 15-amp-hour lithium battery provides a substantial 720 watt-hours of energy capacity. This high-density cell configuration supports an expansive range of 38 to 99 miles (61–160 km) per charge, depending on assist level, terrain, and rider input. The battery management system continuously monitors cell balance, temperature, and charge cycles, ensuring long-term reliability and safe operation across hundreds of charge-discharge cycles.
Precision Drivetrain Meets Advanced Suspension. The HKM-703059 pairs a 6-speed gear system with a dual suspension platform to handle everything from paved commuter paths to rutted mountain singletrack. The 6-speed cassette provides a wide gear range, enabling efficient pedaling at low speeds on steep grades and comfortable cadence at higher velocities. The dual suspension — comprising a front fork and rear shock — works in tandem to absorb impacts, reduce rider fatigue, and maintain tire contact with the ground. This means more control, more comfort, and more confidence when the terrain gets unpredictable.
Electric fat tire bikes occupy a unique niche in the cycling world. The oversized tires act as natural suspension elements, deforming over obstacles that would jar a narrower tire. Combined with the mechanical dual suspension, the HKM-703059 offers a plush ride quality that rivals full-suspension mountain bikes costing significantly more. The 20-inch wheel diameter strikes a balance between agility and rollover capability, making the bike nimble enough for urban maneuvering yet stable enough for off-road exploration.
Steel Alloy Frame — Built to Endure
The frame is constructed from durable steel alloy, selected for its exceptional strength-to-weight characteristics and natural vibration-damping properties. Steel absorbs road chatter and trail feedback more effectively than aluminum, contributing to a smoother ride without adding excessive weight. The frame geometry is optimized for both seated pedaling efficiency and stand-over clearance during technical maneuvers, accommodating a broad range of rider heights and riding styles.
20-Inch Fat Tires — All-Terrain Dominance
The 20-inch fat tires provide a massive contact patch that excels on soft surfaces like sand, snow, and loose gravel where standard tires would sink or slip. The increased air volume allows lower tire pressures without risking pinch flats, enhancing traction and comfort simultaneously. On hard surfaces, the wide footprint improves cornering grip and braking stability, giving you confidence at speed regardless of the conditions under wheel.
Disc Brake System — Confident Stopping Power
Equipped with a reliable mechanical disc brake system, the HKM-703059 delivers consistent stopping performance in wet, muddy, or dry conditions. Unlike rim brakes that lose effectiveness when rims are wet or contaminated, disc brakes operate at the rotor — away from water, mud, and debris. This means predictable, powerful deceleration every time you squeeze the levers, whether you are descending a steep trail or navigating busy urban traffic.
Integrated Lighting System
Front headlights and rear taillights come integrated into the bike's electrical system, powered directly by the main battery. This eliminates the need for separate batteries or recharging routines. The lights significantly enhance visibility during dawn, dusk, and nighttime rides — both illuminating the path ahead and ensuring you remain visible to motorists, pedestrians, and other cyclists from behind.
LCD Display — Ride Intelligence at a Glance
The handlebar-mounted LCD display provides real-time feedback on speed, battery level, assist mode, trip distance, and odometer readings. The high-contrast screen remains legible in direct sunlight and dim conditions alike. With this data readily available, you can manage your battery consumption strategically, extend your range when needed, and stay informed about every aspect of your journey without distraction.
Rapid Charging — 1 to 3 Hours
The fast-charging capability of the HKM-703059 means minimal downtime between rides. With a full recharge achievable in as little as 1 to 3 hours using the included charger, you can top up the battery during a lunch break, at the office, or while relaxing at a café. This rapid turnaround transforms the bike from a recreational vehicle into a practical daily transportation solution that fits seamlessly into a busy lifestyle.
Engineering Insights
Understanding the technology behind the HKM-703059.
Why a Mid-Drive Motor Matters. In the e-bike world, motors fall into two broad categories: hub-drive and mid-drive. Hub motors reside inside the wheel hub and push the bike forward by spinning the wheel directly. Mid-drive motors, like the 750W unit on the HKM-703059, sit at the bike's bottom bracket and drive the crankset. This design leverages the bike's existing gear system — the motor's power flows through the chain and cassette, meaning the motor benefits from gear reduction on climbs and can spin efficiently at higher speeds. The result is superior hill-climbing torque, more natural pedal-assist feel, and better overall efficiency across varied terrain.
Battery Range Demystified. The stated 38–99 mile (61–160 km) range reflects real-world variability. In pure electric throttle mode on flat ground, expect around 38–50 miles (61–80 km). In pedal-assist mode with moderate rider input, the range extends to 60–80 miles (97–129 km). On eco mode with consistent pedaling, ranges approaching 99 miles (160 km) are achievable. Factors such as rider weight, tire pressure, wind conditions, elevation gain, and ambient temperature all influence actual range. The 720Wh battery capacity places this bike in the upper tier of its class, providing ample energy for extended adventures.
The Fat Tire Advantage. Fat tires originated in the early 2000s among Alaskan cyclists seeking winter traction. The concept proved so effective that it expanded into sand, mud, and rocky terrain applications. A wider tire distributes the rider's weight over a larger surface area, reducing ground pressure and preventing the tire from sinking into soft substrates. At lower pressures — often 5–15 PSI for fat tires — the tire conforms to surface irregularities, acting as an additional layer of passive suspension. On the HKM-703059, the 20-inch fat tires complement the dual suspension system, creating a remarkably composed ride over surfaces that would challenge conventional mountain bikes.
Technical Specifications
Key parameters of the HKM-703059.
Motor Type
750W Central Mid-Drive
Battery
48V 15Ah Lithium (720Wh)
Range
38–99 mi (61–160 km)
Top Speed
19–31 mph (30–50 km/h)
Frame Material
Steel Alloy
Wheel Size
20-inch Fat Tire
Suspension
Dual (Front & Rear)
Gear System
6-Speed
Brake Type
Disc Brake System
Charging Time
1–3 Hours (Fast Charge)
Lighting
Integrated Headlight & Taillight
Display
LCD with Ride Metrics
Frequently Asked Questions
Common inquiries about the HKM-703059 electric fat tire bike.
What type of terrain can the HKM-703059 handle?
The HKM-703059 is designed as a versatile all-terrain electric bike. Its fat tires excel on snow, sand, loose gravel, mud, and hardpack trails. The dual suspension smooths out rocky singletrack and potholed city streets alike. With the 6-speed gear system and 750W mid-drive motor, it handles steep inclines confidently. This makes it suitable for mountain trail riding, beach cruising, winter commuting, and everyday urban transportation.
How long does the battery last on a full charge?
Battery range varies based on riding mode, terrain, rider weight, and conditions. In throttle-only mode on flat terrain, expect approximately 38–50 miles (61–80 km). Using pedal-assist, range increases to 60–80 miles (97–129 km). In eco assist mode with consistent pedaling, ranges up to 99 miles (160 km) are achievable. The 48V 15Ah (720Wh) battery provides substantial capacity for extended rides.
Is the battery removable for charging?
Yes, the integrated 48V 15Ah lithium battery can be removed from the frame for convenient off-bike charging. This allows you to charge the battery indoors at home, in an office, or anywhere with a standard electrical outlet, while keeping the bike securely parked elsewhere. The battery locks into the frame when installed, providing security against theft.
What is the advantage of a mid-drive motor over a hub motor?
A mid-drive motor drives the crankset rather than the wheel directly, allowing it to leverage the bike's gear system. This provides superior climbing torque on steep hills, more efficient power usage across varying speeds, and a lower, more centralized center of gravity for improved handling. The riding feel is more natural because the motor's assistance is proportional to your pedaling through the drivetrain.
How fast can the HKM-703059 go?
The HKM-703059 reaches a maximum speed range of 19–31 mph (30–50 km/h), depending on riding mode, terrain, and rider input. The actual top speed may be influenced by local regulations, which can impose speed limits on electric bicycles. Always check and comply with your local e-bike laws regarding speed and power restrictions.
Does the bike require assembly upon delivery?
The HKM-703059 arrives partially assembled with the major components pre-installed. Basic assembly typically includes attaching the handlebars, front wheel, pedals, and seat post. All necessary tools and instructions are included. Most riders complete assembly within 30–60 minutes. For optimal safety and performance, professional assembly at a local bike shop is recommended if you are not comfortable with the process.
Purchase with Confidence
Free Shipping on All Orders
Complimentary standard shipping on every HKM-703059 order. Your bike arrives at your doorstep with no additional delivery charges.
180-Day Purchase Protection
Extended coverage against manufacturing defects for 180 days from the date of purchase, safeguarding your investment.
30-Day Money-Back Guarantee
Not completely satisfied? Return the bike within 30 days in original condition for a full refund — no questions asked.
24-Month Warranty Service
Comprehensive 2-year warranty covering the motor, battery, frame, and electronic components for lasting peace of mind.
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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