Full-Suspension Fat-Tire Electric Bike
HKM-0565459 Electric Fat Tire Bike
The HKM-0565459 pairs a 500 W nominal brushless rear hub motor (1500 W peak) with a 48 V 20 Ah lithium pack in a full-suspension aluminum frame built for mixed-surface riding. The 20 x 4.0 in fat tires float over sand, snow, gravel and pavement imperfections while a front hydraulic fork and rear coil spring absorb what the tires cannot. Hydraulic disc brakes at both ends, a 7-speed drivetrain, integrated LED lighting, and a color LCD round out a bike that handles city commutes, fire-road adventures, and weekend trail rides with equal confidence.
500 W (1500 W Peak) Motor48 V 20 Ah / 960 Wh Pack31 mph Top Speed20 x 4.0 in Fat TiresHydraulic Disc BrakesFull Suspension331 lb Load Capacity7-Speed Drivetrain
Motor
500 W
1500 W peak rear hub
Battery
48 V 20 Ah
960 Wh removable lithium
Top Speed
31 mph
50 km/h, throttle only
Range
50-70 mi
80-113 km, varies with assist
Tires
20 x 4.0 in
Fat tread, all-terrain
Load Capacity
331 lb
150 kg rider plus cargo
Overview
The HKM-0565459 is built around a hydroformed 6061 aluminum alloy frame that combines low weight with the rigidity needed for a high-torque hub motor and a heavy battery pack. The compact 20-inch wheelbase keeps the bike agile in tight urban spaces while the fat tire footprint provides stability on loose surfaces that would unsettle a narrower-tired commuter.
The powertrain is a 500 W nominal brushless rear hub motor capable of surging to 1500 W peak output for short bursts on hills and from-stop acceleration. It drives through an internal planetary gear reduction so there is no chain between motor and ground — drive losses stay low and maintenance is limited to keeping the axle hardware torqued. The motor is fed by a 48 V 20 Ah lithium pack storing roughly 960 Wh of energy.
A full-suspension chassis sets this bike apart from hardtail fat-tire alternatives. The front hydraulic fork and rear coil spring work together to absorb potholes, roots, curb drops, and gravel chatter. The suspension keeps both tires planted on uneven surfaces — improving traction during braking and acceleration while reducing rider fatigue on longer journeys across mixed terrain.
Real-world range spans a wide band depending on how you ride. Throttle-only on flat pavement at moderate speed returns around 35-45 mi. Moderate pedal-assist on the same terrain stretches that to 55-65 mi. Aggressive pedaling at low assist can reach 70 mi from a full charge. Cold weather, soft tires, and hilly terrain all reduce those numbers; warmer months and firmer tires push them back up.
Key Features
500 W Brushless Rear Hub Motor (1500 W Peak)
A 500 W nominal motor with 1500 W peak capability is laced into the rear wheel hub. Internal planetary gearing delivers smooth, quiet power transfer with no chain or belt between motor and road surface. Peak output handles steep hills and confident launches from intersections.
48 V 20 Ah Lithium Pack (960 Wh)
The removable lithium pack sits in the down tube behind a lockable cover and lifts out with a key for indoor charging. 960 Wh provides enough energy for a full week of short commutes or a long weekend of trail exploration. A full recharge takes about 4-6 hours.
Full Suspension: Hydraulic Front Fork + Rear Coil Spring
A hydraulic front fork with lockout smooths broken pavement and gravel when unlocked, and firms up for efficient pedaling when locked. A progressive-rate rear coil spring under the seat absorbs larger impacts. The linkage design resists bottom-out on big hits while staying supple over small chatter.
Hydraulic Disc Brakes, Front and Rear
Sealed hydraulic lines actuate dual-piston calipers at both wheels. Lever effort stays light and predictable even when rotors get hot on long descents. Power-off brake levers cut motor drive instantly when either lever is pulled — a key safety feature.
7-Speed Shimano Derailleur Drivetrain
A 7-Speed drivetrain with index shifter gives usable pedaling cadence from walking pace up to cruising speed. The wide gear range lets you contribute meaningful human power on climbs, extending range and reducing battery draw on longer rides.
20 x 4.0 in All-Terrain Fat Tires
Run at low pressure (5-20 PSI depending on surface), the wide casing spreads rider weight over a large contact patch. Float over sand and snow, grip tenaciously on loose gravel and mud, and roll smoothly over pavement cracks and potholes.
LED Headlight and Integrated Brake Light
A bright LED headlight runs off the main battery so there are no separate batteries. An integrated brake light brightens whenever either brake lever is pulled, adding visibility from behind in traffic and at dusk.
Rear Rack With Cargo Capacity
A sturdy rear rack supports panniers, a backpack, or grocery loads. Combined with the 331 lb total load rating, the bike doubles as a practical utility vehicle for daily errands and bikepacking adventures.
Full Specifications
Model
HKM-0565459 | Electric Fat Tire Bike
Frame Material
6061 aluminum alloy, hydroformed tubing
Motor
500 W brushless rear hub motor, 1500 W peak
System Voltage
48 V DC
Battery
48 V 20 Ah lithium-ion (960 Wh), removable and lockable
Charger
3 A smart charger, 100-240 V input
Charging Time
4-6 hours from empty
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity
Top Speed
31 mph (50 km/h)
Range per Charge
50-70 mi (80-113 km), varies with terrain, rider weight, and assist level
Climbing Grade
Up to approximately 25 degrees with a solo rider
Peak Torque
60-70 N.m
Drivetrain
7-Speed Shimano derailleur with index shifter
Brakes
Hydraulic disc brakes, front and rear, with power-off levers
Suspension
Lockable hydraulic front fork + rear coil spring (full suspension)
Tires
20 x 4.0 in fat tires, knobby all-terrain tread
Wheels
20 in alloy rims, stainless spokes
Saddle
Wide ergonomic saddle with adjustable height
Display
Backlit color LCD: speed, battery level, assist mode, trip distance, odometer
Throttle
Twist-grip throttle with 5 pedal-assist levels and zero assist
Lighting
LED headlight, integrated brake-activated tail-light, powered by main battery
Load Capacity
331 lb (150 kg) rider plus cargo
Bike Weight
Approximately 75 lb (34 kg) including battery
Recommended Rider Height
5 ft 2 in to 6 ft 4 in (157-193 cm)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The 48 V 20 Ah pack stores 960 Wh of energy. Most commuter e-bikes ship with 400-600 Wh packs, so this unit runs 60-140 percent above the usual energy budget. That headroom is what lets the bike handle a throttle-only commute or an extended trail ride without range anxiety at the end of the day.
Real-world range depends on four variables more than anything else: how much you pedal, rider and cargo weight, tire pressure, and terrain. Throttle-only on flat pavement lands in the 35-45 mi band. Moderate pedal-assist returns 55-65 mi. Aggressive pedaling at low assist can reach 70 mi. Cold weather below 40 F (4 C) temporarily reduces capacity by 10-20 percent; it returns once the pack warms up.
Tip: Store the pack between 30 and 70 percent charge if the bike will sit unused for more than a month, and top it up every 4-6 weeks. Charging indoors at room temperature extends usable pack life considerably compared with charging in an unheated garage.
The pack unlocks with the supplied key and lifts out of the down tube in seconds, so you can charge it at a desk while the bike stays locked outside. Two keys are included. Charging with the pack installed works equally well through the accessible charge port.
Daily Use & Care
- Adjust tire pressure for your terrain: 15-20 PSI on pavement for lower rolling resistance, 10-15 PSI for gravel and dirt, 5-10 PSI for snow or soft sand.
- Rinse the frame, rims, and drivetrain with fresh water after riding on salted roads or wet gravel. Road film attacks aluminum fasteners over time.
- Check axle nuts, stem bolts, and motor mount fasteners before the first ride of each week. Hub-motor torque works hardware loose faster than conventional bikes.
- Wipe and re-lubricate the chain every 100-150 mi, or after any ride through standing water or dusty conditions.
- Inspect brake pad thickness monthly. Hydraulic pads wear silently until gone; replace when friction material is under 1 mm.
- Charge indoors at room temperature. Unplug once the indicator turns green rather than leaving it connected overnight.
- Keep display and charge port covers closed when parked outside so moisture stays out of connectors.
What's in the Box
- 1 x HKM-0565459 electric fat tire bike, approximately 85 percent pre-assembled
- 1 x 48 V 20 Ah removable lithium battery pack
- 1 x 3 A smart charger with 100-240 V input
- 2 x Battery keys
- 1 x Toolkit with hex wrenches and pedal spanner
- 1 x Pair of folding pedals
- 1 x User manual and assembly guide
Frequently Asked Questions
How much assembly is required out of the box?+
The bike ships roughly 85 percent assembled. Remaining steps are fitting the front wheel, straightening and bolting the handlebar, installing the pedals and saddle, and checking brake alignment. Budget 30-45 minutes with the supplied tools.
What kind of range can I expect?+
Plan for 50-70 miles depending on assist level and terrain. Throttle-only at higher speeds lands closer to 35-45 miles. Moderate pedal-assist on mixed terrain returns 55-65 miles. Heavier riders, headwinds, hills, and low tire pressure all reduce range.
How does the full suspension help on everyday rides?+
On urban roads it absorbs vibration from cracked pavement, speed bumps, and railroad crossings - reducing fatigue on longer commutes. It also enhances safety by keeping both tires planted during emergency braking or evasive maneuvers on uneven surfaces.
Is a license or registration required?+
Rules vary by state. A 500 W nominal motor with 1500 W peak and 31 mph top speed may exceed standard e-bike class limits in some jurisdictions. Check your state DMV and local ordinances before riding on public roads.
How long does the battery take to charge?+
About 4-6 hours from fully empty with the supplied 3 A charger. Partial top-ups take less time; there is no need to run the pack down before recharging.
Can I pedal it if the battery runs out?+
Yes. The 7-Speed Shimano drivetrain works independently of the motor. The bike is heavy at approximately 75 lb, so unassisted pedaling is slow but entirely possible on flat ground.
Will the brakes handle the speed and load?+
Hydraulic disc brakes front and rear are appropriate for a 31 mph bike of this weight. Bed the pads in during the first few rides with 10-15 progressive stops from moderate speed.
Is the battery removable for indoor charging?+
Yes. It unlocks with the supplied key and lifts out of the down tube. You can also charge it in place through the frame-side charge port.
Service & Policies
Free Shipping on All Orders
Every order ships free. Handling Time: 0-1 business days (Monday to Friday). Transit Time: 2-5 business days (Monday to Friday). A tracking number is emailed as soon as the parcel leaves our warehouse.
180 Days Purchase Protection
Your purchase is protected for 180 days from the delivery date against manufacturing defects and damage in transit. If something arrives wrong, we make it right.
30 Days Money-Back Guarantee
Not completely satisfied? Request a return within 30 days of delivery for a full refund. We keep the process simple and hassle-free.
24 Months Warranty Service
The product is covered by a 24-month warranty from the delivery date against manufacturing defects. Coverage includes parts and labor; normal-wear items are excluded.
CERoHSUN38.3 Battery960 Wh PackHydraulic BrakesFull SuspensionFat Tires
Why Choose the HKM-0565459
One Bike, Many Surfaces
Fat tires, full suspension, and a powerful hub motor unlock access to city streets, bike lanes, fire roads, gravel paths, beach boardwalks, and even light snow — all from one bike that fits through your front door.
Full Suspension for Real Roads
Potholes, expansion joints, curb drops, and gravel shortcuts become comfortable surfaces when the front fork and rear spring absorb what a rigid frame would transmit directly to your body. The fork lockout lets you firm up the ride on smooth pavement.
Two Ways to Ride
Twist the throttle for immediate acceleration, or shift through the 7-speed Shimano cassette and pedal. Most owners mix both — throttle to get moving from a stop, pedals to extend range, and motor assist for hills.
Direct-Drive Simplicity
The motor lives in the rear hub with no mid-drive gearbox, belt, or extra chain to service. Fewer moving parts in the drive path means less maintenance and a notably quiet ride.
Compact 20-Inch Wheel Platform
The 20-inch diameter lowers standover height and center of gravity, making the bike easier to mount and more stable at low speeds. The compact wheelbase navigates tight urban spaces and alleyways with agility.
Built for Daily Use
Sealed electrical connectors, a covered and lockable battery compartment, and hydraulic brake lines that resist corrosion make sense for a bike ridden to work every day and parked outside in varied weather.
Controls & Indicators
Power Button
Located on the battery pack; hold to switch the system on and off
Mode Buttons
Up and down buttons on the display cycle through 5 pedal-assist levels plus zero assist
Twist Throttle
Right-hand grip; proportional response, works independently of pedal-assist level
Speedometer
Live speed readout in mph, switchable to km/h in the settings menu
Battery Gauge
5-segment charge indicator plus percentage readout on the color LCD
Light Switch
Long-press the up button to toggle the LED headlight and integrated brake light
Shifter
Right-hand index shifter for the 7-Speed Shimano rear derailleur
Pre-Ride Safety Checklist
- Check tire pressure and set it for the terrain: 15-20 psi for pavement, 10-15 psi for gravel or dirt, 5-10 psi for soft surfaces.
- Squeeze both brake levers. They should firm up well before reaching the grip, with no sponginess indicating air in the hydraulic line.
- Confirm the battery is seated and locked, and that the display shows expected state of charge.
- Spin both wheels and check that the rims run true and nothing rubs the brake pads or frame.
- Verify quick-release levers and axle nuts are tight, and that the headset has no play when you rock the bike with the front brake applied.
- Test the throttle at walking pace in a clear area before riding in traffic.
- Switch on the headlight and tail-light if riding near dusk, and wear a helmet rated for the speeds this bike reaches.
Quick Troubleshooting
The motor does not engage when I twist the throttle.+
Confirm the display is on and shows charge, the battery is locked in place, and both brake levers are fully released — brake cut-off sensors disable the motor while a lever is pulled. If the display shows an error code, note it and contact support.
Range dropped noticeably compared with when it was new.+
First check tire pressure; a soft tire is the most common cause. Then consider temperature — cold reduces available capacity temporarily. If range is down more than 30 percent year-round after many cycles, the pack may be approaching end of service life.
The brakes feel spongy at the lever.+
Sponginess usually means air in the line or fluid degradation. Stop riding and have the system bled and inspected. Do not continue riding on compromised brakes.
The chain skips under hard pedaling.+
Derailleur indexing is likely out of adjustment, or the chain and cassette are worn. Adjust the barrel adjuster a quarter turn at a time. If skipping persists only in the smallest cogs, replace the cassette and chain together.
The front fork rattles over bumps.+
Check that the quick-release or thru-axle is fully closed and the wheel is seated. If rattle persists, inspect stanchions for scoring and have the fork serviced if needed.
The display shows an error code and the bike will not move.+
Power off, wait 30 seconds, and switch back on. If the code returns, note the exact code and conditions, then contact support — codes map to specific faults in controller, motor, or throttle.
Certifications & Standards
The HKM-0565459 is produced in a facility operating under an ISO 9001 quality management system. The battery cells and assembled pack carry test documentation normally required for lithium-ion transport and sale.
- CE - European Conformity marking covering the electrical assembly.
- RoHS - Restriction of Hazardous Substances compliance for the electronics.
- UN38.3 - Battery transport safety testing, required for lithium-ion shipping by air, sea, and road.
- MSDS - Material Safety Data Sheet available for the battery pack on request.
- ISO 9001 - Quality management system certification held by the manufacturing facility.
Important Safety Notes
This is a high-output electric bicycle capable of 31 mph. Read the manual fully before the first ride and practice throttle control in an open, traffic-free area until the response feels predictable.
- Wear a helmet on every ride. At 31 mph a certified bicycle helmet is the minimum; many riders choose additional protection.
- Do not exceed the 331 lb (150 kg) load capacity, which includes the rider and any cargo.
- Check local law before riding on public roads or paths. A 500 W nominal motor with 1500 W peak output and 31 mph top speed may place this vehicle outside standard e-bike classifications in your area.
- Bed in the brake pads with 10-15 progressive stops during the first few rides before riding at full speed.
- Do not ride through water deep enough to reach the hub motor or battery compartment.
- Charge only with the supplied charger, indoors, at room temperature, and on a non-flammable surface.
- Do not attempt to open, puncture, or modify the battery pack. Damaged lithium packs can vent and ignite.
- Reduce speed substantially on gravel, wet surfaces, and downhill grades; fat tires add grip but do not eliminate traction risk.
HKM-0565459 · 500 W brushless rear hub (1500 W peak) · 48 V 20 Ah lithium (960 Wh) · 31 mph top speed · 50-70 mi range · 20 x 4.0 in fat tires · 331 lb (150 kg) load capacity · 6061 aluminum frame · full suspension · hydraulic disc brakes · 7-speed Shimano drivetrain. Specifications are provided for reference; actual performance varies with rider weight, terrain, tire pressure, temperature, and riding style. This page describes the product only and is not legal advice regarding vehicle classification - confirm local regulations before riding on public roads.
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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.
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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.
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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.
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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.
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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.
