750W Full-Suspension Fat-Tire Electric Bike
HKM-0106707 Electric Fat-Tire Bike
The HKM-0106707 is a full-suspension fat-tire electric bike built for riders who want one machine for city streets, gravel paths, sandy beaches, and light snow. A 750 W brushless geared rear hub motor and a 48 V 20 Ah lithium pack (960 Wh) deliver speeds up to 28 mph and a range of up to 80 mi under ideal conditions. Inverted front forks, an adjustable rear shock, 20 x 4.0 in tires, and hydraulic disc brakes give the bike the control and comfort to handle the weight of its 400 lb payload rating.
750 W (1200 W Peak) Motor48 V 20 Ah / 960 Wh Pack28 mph Top Speed20 x 4.0 in Fat TiresHydraulic Disc BrakesFull Suspension400 lb Load CapacitySingle-Speed Drivetrain
Motor
750 W
1200 W peak rear hub
Battery
48 V 20 Ah
960 Wh removable lithium
Top Speed
28 mph
45 km/h, throttle only
Range
45-80 mi
72-129 km, varies with assist
Tires
20 x 4.0 in
Fat tread, multi-surface
Load Capacity
400 lb
181 kg rider plus cargo
Overview
The HKM-0106707 is built on a 6061 aluminum alloy frame with a reinforced head tube, dropouts, and bottom-bracket area to support a 400 lb total load. The frame geometry is neutral enough for commuting but tough enough for trail use, and the hydroformed tubes keep weight reasonable for a bike of this capacity.
Power comes from a 750 W brushless geared rear hub motor with a 1200 W peak output. The geared design provides strong torque from a standstill, which is important when accelerating with a heavy rider or cargo. A 48 V 20 Ah lithium pack stores 960 Wh and unlocks with a key for indoor charging.
Real-world range falls between 45 and 80 mi. Throttle-only riding at higher speeds on mixed terrain lands near 45 mi. Moderate pedal-assist on flat pavement regularly returns 60-70 mi, and low-assist cruising can stretch to 80 mi under ideal conditions. Cold weather, soft tires, heavy loads, and steep hills all reduce those numbers.
The full-suspension package starts with inverted front forks that reduce unsprung weight and improve torsional stiffness, followed by an adjustable rear coil-over shock that lets you tune preload and rebound for rider weight and terrain. The 20 x 4.0 in fat tires add flotation and grip, while dual-piston hydraulic disc brakes provide the stopping power needed for a loaded 28 mph bike.
Key Features
750 W Brushless Rear Hub Motor
A 750 W brushless geared motor (1200 W peak) is laced into the rear wheel. The geared design delivers strong low-speed torque for starts, hills, and heavy loads while keeping the bike responsive around town.
48 V 20 Ah Lithium Pack (960 Wh)
The pack sits in the down tube behind a lockable cover and lifts out with a key for indoor charging. 960 Wh is enough for a full week of short commutes or a long weekend ride between charges. A full recharge from empty takes about 6-8 hours.
Full Suspension: Inverted Fork + Adjustable Rear Shock
Inverted front forks improve steering precision and reduce unsprung weight, while the adjustable rear shock lets you dial in preload and rebound. The combination keeps the ride controlled on broken pavement and light trails.
Hydraulic Disc Brakes, Front and Rear
Dual-piston hydraulic calipers at both wheels provide progressive, fade-resistant braking. Power-off brake levers cut motor drive the instant either lever is pulled.
Single-Speed Drivetrain
A single-speed chain drive eliminates derailleurs, shifters, and adjustment headaches. The motor broad torque curve covers acceleration and cruising, and maintenance is limited to chain tension and lubrication.
20 x 4.0 in All-Terrain Fat Tires
Run at 5-8 psi the wide casing floats over sand and snow; at 15-20 psi it rolls efficiently on pavement. The knobby tread adds grip on gravel, dirt, and wet pavement.
LED Headlight and Integrated Brake Light
A bright LED headlight runs off the main pack for dusk and night riding. A brake-activated tail-light improves visibility from behind in traffic.
400 lb Payload Capacity
The reinforced frame, fork, and wheels are rated for a 400 lb total load. That leaves room for a rider plus groceries, camping gear, or a child seat on compatible rack and mounting points.
Full Specifications
Model
HKM-0106707 | Electric Fat-Tire Bike
Frame Material
6061 aluminum alloy, reinforced for heavy loads
Motor
750 W brushless geared rear hub motor, 1200 W peak
System Voltage
48 V DC
Battery
48 V 20 Ah lithium-ion (960 Wh), removable and lockable
Charger
2 A smart charger, 100-240 V input
Charging Time
6-8 hours from empty
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity
Top Speed
28 mph (45 km/h)
Range per Charge
45-80 mi (72-129 km), varies with terrain, rider weight, and assist level
Climbing Grade
Up to approximately 15 degrees with a full load
Peak Torque
85 N.m
Drivetrain
Single-speed chain drive with adjustable tension
Brakes
Dual-piston hydraulic disc brakes, front and rear, with power-off levers
Suspension
Inverted hydraulic front fork + adjustable rear coil-over shock
Tires
20 x 4.0 in fat tires, knobby all-terrain tread
Wheels
20 in alloy rims, stainless spokes
Saddle
Wide comfort saddle
Display
Backlit 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
400 lb (181 kg) rider plus cargo
Bike Weight
Approximately 73 lb (33 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. That is roughly 50-100 percent more capacity than a typical commuter e-bike, giving the range to handle throttle-heavy commutes and mixed-terrain weekend rides without range anxiety.
Real-world range depends on how much you pedal, rider and cargo weight, tire pressure, and terrain. Throttle-only riding at higher speeds lands near 45 mi. Moderate pedal-assist on flat pavement regularly returns 60-70 mi. Low-assist cruising on level ground can reach 80 mi from a full charge. Cold weather below 40 F (4 C) temporarily reduces available capacity by 10-20 percent.
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 compared with charging in an unheated garage.
The pack unlocks with the supplied key and lifts out of the down tube in a few seconds. Two keys are included. You can also charge the pack in place through the frame-side charge port.
Daily Use & Care
- Tire pressure sets the character of the bike. Run 15-20 psi on pavement for lower rolling resistance; drop to 5-8 psi for sand and snow so the tire can flatten and grip the surface.
- Rinse the frame, rims, and drivetrain with fresh water after riding on salted roads or wet gravel. Road film attacks aluminum fasteners over time if left in place.
- Check chain tension every 100-150 mi and after rides through standing water or dust. A loose single-speed chain can skip and wear the sprockets quickly.
- Check that both axle nuts and the stem bolts are torqued before the first ride of each week. Hub-motor torque works fasteners loose faster than on a conventional bicycle.
- Inspect brake pad thickness monthly. Hydraulic pads wear silently until they are gone; replace when the friction material is under 1 mm.
- Charge indoors at room temperature. Unplug the charger once the indicator turns green rather than leaving it connected for days.
- Keep the display and charge port covers closed when the bike is parked outside so moisture stays out of the connectors.
What's in the Box
- 1 x HKM-0106707 electric bike, approximately 85 percent pre-assembled
- 1 x 48 V 20 Ah removable lithium battery pack
- 1 x 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 approximately 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 is the actual range I should plan for?+
Plan for 45-80 mi depending on how much you pedal. Throttle-only riding at higher speeds lands closer to 45 mi. Moderate pedal-assist on flat pavement regularly returns 60-70 mi. Heavier riders, headwinds, hills, and low tire pressure all reduce range.
Is a license or registration required?+
Rules vary by state and locality. A 750 W nominal motor with 1200 W peak output and 28 mph top speed may exceed the limits of the common three-class e-bike framework in many US jurisdictions. Check your state DMV and local ordinances before riding on public roads or bike paths.
How long does the battery take to charge?+
About 6-8 hours from fully empty with the supplied 2 A charger. Partial top-ups take proportionally less time; there is no need to run the pack down before recharging.
Can I pedal it if the battery runs out?+
Yes. The single-speed drivetrain works independently of the motor. The bike is heavy at approximately 73 lb, so pedaling home unassisted is slow going, but it is possible on flat ground.
How does the single-speed drivetrain handle hills?+
The motor provides most of the climbing torque, and the single-speed chain is sized for the loads. For very steep or sustained hills, use a higher pedal-assist level and add human power at a comfortable cadence.
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.
Will the brakes handle the speed and the load?+
Dual-piston hydraulic disc brakes front and rear are the appropriate specification for a 28 mph bike with a 400 lb load rating. Bed the pads in during the first few rides with 10-15 progressive stops from moderate speed.
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 Suspension400 lb Load
Why Choose the HKM-0106707
All-Terrain, All-Season
The full suspension and 20 x 4.0 in fat tires let the bike handle pavement, gravel, sand, and light snow. It is a true four-season machine for riders who do not want to own multiple bikes.
Full Suspension for Comfort
The inverted fork and adjustable rear shock absorb broken pavement, roots, and rocks that would jar a rigid bike. The result is less fatigue on long rides.
Twist and Go
The twist throttle provides instant acceleration, while five pedal-assist levels let you choose how much effort to contribute. No shifter means one less thing to think about.
Low-Maintenance Drivetrain
A single-speed chain and a hub motor mean no derailleurs, shift cables, or complex gear adjustments. Routine care is limited to chain tension and lubrication.
Heavy-Duty Payload
The 400 lb load capacity gives room for large riders, cargo, child seats, or touring gear without pushing the frame beyond its design limits.
Built for Daily Use
Sealed connectors, a covered and lockable battery compartment, and hydraulic brake lines resist corrosion and make sense for a bike that is parked outside and ridden 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 backlit LCD
Light Switch
Long-press the up button to toggle the LED headlight and integrated brake light
Single-Speed
No shifter needed; the single-speed drivetrain is driven by the motor and pedals
Pre-Ride Safety Checklist
- Check tire pressure and set it for the terrain you plan to ride: 15-20 psi for pavement, 10-12 psi for gravel or dirt.
- Squeeze both brake levers. They should firm up well before reaching the grip, with no sponginess that would indicate air in the hydraulic line.
- Confirm the battery is seated and locked, and that the display shows the expected state of charge.
- Spin both wheels and check that the rims run true and nothing rubs the brake pads or the frame.
- Verify the 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 or with a passenger.
- Switch on the headlight and tail-light if you will be riding near dusk, and wear a helmet rated for the speeds this bike reaches.
- If carrying cargo, confirm it is secured and does not exceed the rated total load including the rider.
Quick Troubleshooting
The motor does not engage when I twist the throttle.+
Confirm the display is on and shows charge, the battery is locked into 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 on pavement 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 charge cycles, the pack may be approaching the end of its service life.
The brakes feel spongy at the lever.+
Sponginess in a hydraulic system usually means air in the line or a fluid leak. Stop riding and have the system bled and inspected. Do not continue riding a 28 mph bike on compromised brakes.
The chain skips or feels loose.+
Check chain tension. A single-speed chain should have about 0.5-0.75 in of vertical play at the midpoint. Adjust the rear wheel position or tensioner as needed, and lubricate the chain.
The front fork rattles over bumps.+
Check that the quick-release lever on the fork is fully closed and that the wheel is seated in the dropouts. If the rattle persists, the fork may need service - inspect the stanchions for scoring.
The display shows an error code and the bike will not move.+
Power the system off, wait 30 seconds, and switch it back on. If the code returns, note the exact code and the conditions that produced it, then contact support.
Certifications & Standards
The HKM-0106707 is produced in a facility operating under an ISO 9001 quality management system. The battery cells and the assembled pack carry the 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 28 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 28 mph a bicycle helmet is the minimum; many riders choose a certified motorcycle or downhill helmet at these speeds.
- Do not exceed the 400 lb (181 kg) load capacity, which includes the rider, any passenger, and cargo.
- Check local law before riding on public roads or paths. A 750 W motor with 1200 W peak peak output and 28 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 or with cargo.
- Do not ride through water deep enough to reach the hub motor or the battery compartment.
- Charge only with the supplied charger, indoors, at room temperature, and on a non-flammable surface. Do not leave a charging battery unattended overnight.
- 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 the risk of losing traction.
HKM-0106707 · 750 W brushless rear hub (1200 W peak) · 48 V 20 Ah lithium (960 Wh) · 28 mph top speed · 45-80 mi range · 20 x 4.0 in fat tires · 400 lb (181 kg) load capacity · 6061 aluminum frame · full suspension · hydraulic disc brakes · single-speed drivetrain. Specifications are provided for reference; actual performance varies with rider weight, terrain, tire pressure, temperature, and riding style. Range figures are measured under moderate pedal-assist on level pavement. 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.
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