Full-Suspension Electric Fat Bike
HKM-7420499 Electric Fat Bike
The HKM-7420499 pairs a 1000 W brushless rear hub motor with a 48 V 18 Ah lithium pack (864 Wh) in a 6061 aluminum full-suspension frame. The 26 x 4.0 in fat tires, hydraulic disc brakes, and 7-speed drivetrain let you ride pavement, gravel, sand, and light snow with confidence. It is built for riders who want comfort, range, and all-terrain capability in one package.
1000 W Rear Hub Motor48 V 18 Ah / 864 Wh Pack31 mph Top Speed26 x 4.0 in Fat TiresHydraulic Disc BrakesFull Suspension7-Speed Drivetrain330 lb Load Capacity
Motor
1000 W
Brushless rear hub
Battery
48 V 18 Ah
864 Wh removable lithium
Top Speed
31 mph
50 km/h with throttle
Range
31-50 mi
50-80 km, varies with assist
Tires
26 x 4.0 in
Fat tread, all-terrain
Load Capacity
330 lb
150 kg rider plus cargo
Overview
The HKM-7420499 is built around a 6061 aluminum full-suspension frame with a front fork and rear shock that isolate the rider from rough surfaces. The fat-tire chassis adds flotation on soft ground and absorbs small bumps that would rattle a conventional hardtail.
A 1000 W brushless rear hub motor provides acceleration from a standstill and enough torque for moderate hills. The 48 V 18 Ah lithium-ion pack stores 864 Wh of energy and is removable with a key for indoor charging.
Range is approximately 31 mi on throttle-only riding and up to 50 mi with moderate pedal assist. Actual range depends on rider weight, terrain, tire pressure, and how much the throttle is used. A fast charger replenishes the pack in about 3.5 hours.
Hydraulic disc brakes with power-off levers provide strong, consistent stopping power and instantly cut motor drive when braking. The 7-speed drivetrain lets you maintain an efficient pedaling cadence across varied terrain.
Key Features
1000 W Brushless Rear Hub Motor
The rear hub motor delivers smooth, quiet acceleration and maintains cruising speed with minimal maintenance. The direct-drive layout has no mid-drive gearbox, so there are fewer wearable parts in the power path.
48 V 18 Ah Lithium Pack (864 Wh)
The down-tube battery stores 864 Wh of energy and lifts out with a key for charging. A fast charger refills the pack in approximately 3.5 hours, minimizing downtime between rides.
Full Suspension: Lockable Fork + Rear Shock
A lockable front fork and rear shock absorber work together to smooth out potholes, roots, and washboard roads. Lock the fork for efficient pavement riding; unlock it for trails.
Hydraulic Disc Brakes With Power Cut-Off
Sealed hydraulic lines deliver light, consistent lever effort, and power-off levers cut motor drive as soon as either brake is applied.
7-Speed Drivetrain
A 7-speed Shimano cassette and index shifter give you a wide gear range for climbs and flats. The drivetrain works with the motor to extend range and improve hill-climbing.
26 x 4.0 in All-Terrain Fat Tires
The large-volume tires distribute weight over a broad contact patch, providing flotation on sand and snow while improving grip and comfort on gravel and wet pavement.
LED Headlight and Integrated Tail-Light
A bright LED headlight and brake-activated tail-light improve visibility without requiring separate batteries.
Rear Rack Ready
The aluminum frame includes mounting points for a rear rack, making it practical for commuting and light cargo duty within the 330 lb load rating.
Full Specifications
Model
HKM-7420499 | Electric Fat Bike
Frame Material
6061 aluminum alloy, full-suspension fat-bike geometry
Motor
1000 W brushless rear hub motor
System Voltage
48 V DC
Battery
48 V 18 Ah lithium-ion (864 Wh), removable and lockable
Charger
3 A fast charger, 100-240 V input
Charging Time
Approximately 3.5 hours from empty
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity
Top Speed
31 mph (50 km/h)
Range per Charge
31-50 mi (50-80 km), throttle-only to moderate pedal-assist
Climbing Grade
Up to approximately 25 degrees with a solo rider
Peak Torque
Approximately 80 N.m
Drivetrain
7-speed Shimano derailleur with index shifter
Brakes
Hydraulic disc brakes, front and rear, with power-off levers
Suspension
Lockable front fork + rear shock absorber
Tires
26 x 4.0 in fat tires, all-terrain tread
Wheels
26 in alloy rims, stainless spokes
Saddle
Wide sport saddle with quick-release seat post
Display
Backlit LCD: speed, battery level, assist mode, trip distance, odometer
Throttle
Twist-grip throttle with multiple pedal-assist levels
Lighting
LED headlight, brake-activated tail-light, powered by main battery
Load Capacity
330 lb (150 kg) rider plus cargo
Bike Weight
Approximately 75 lb (34 kg) including battery
Recommended Rider Height
5 ft 4 in to 6 ft 4 in (163-193 cm)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The 48 V 18 Ah pack stores 864 Wh of energy. That is enough for roughly 31 mi of throttle-only riding or up to 50 mi when you contribute moderate pedaling effort.
Range depends on rider weight, terrain, tire pressure, and assist level. Lower assist levels and active pedaling extend range; sustained high-speed throttle use reduces it. Cold weather below 40 F (4 C) temporarily reduces available capacity.
Tip: A 3.5-hour fast charge means you can recharge during a work shift or lunch break. Unplug the charger once the indicator turns green to protect long-term cell health.
The pack unlocks with the supplied key and lifts out of the down tube. You can also charge it in place through the frame-side port.
Daily Use & Care
- Run 15-20 psi on pavement; drop to 8-12 psi for sand, snow, or loose gravel.
- Rinse the frame, rims, and drivetrain after riding on salted roads or wet gravel.
- Check axle nuts and stem bolts weekly; hub-motor torque works fasteners loose over time.
- Wipe and re-lubricate the chain every 100-150 mi, or after wet or dusty rides.
- Inspect brake pad thickness monthly and replace when friction material is under 1 mm.
- Charge indoors at room temperature and unplug the charger once the indicator turns green.
- Keep the display and charge port covers closed when the bike is parked outside.
What's in the Box
- 1 x HKM-7420499 electric fat bike, approximately 85 percent pre-assembled
- 1 x 48 V 18 Ah removable lithium battery pack
- 1 x 3 A fast charger with 100-240 V input
- 2 x Battery keys
- 1 x Toolkit with hex wrenches and pedal spanner
- 1 x Pair of platform pedals
- 1 x User manual and assembly guide
Frequently Asked Questions
How much assembly is required out of the box?+
The bike ships about 85 percent assembled. Remaining steps are fitting the front wheel, bolting the handlebar, installing the pedals and seat, and checking brake alignment. Budget 30-45 minutes.
What is the real-world range?+
Plan for 31 mi on throttle-only riding or up to 50 mi with moderate pedal assist. Hills, headwinds, and high throttle use reduce range.
Is a license or registration required?+
Regulations vary by jurisdiction. A 1000 W motor with a 31 mph top speed may exceed standard e-bike limits in some areas. Check local laws before riding on public roads.
How long does the battery take to charge?+
Approximately 3.5 hours from fully empty with the supplied fast charger. Partial top-ups take proportionally less time.
Can I ride it in the rain or snow?+
Light rain and snow are fine, but avoid submersion and deep water. Dry the bike and charge port after wet rides.
Can I pedal it without motor assistance?+
Yes. The 7-speed Shimano drivetrain works independently. Unassisted pedaling is slower due to weight, but it is possible on flat ground.
Is the battery removable for indoor charging?+
Yes. It unlocks with the supplied key and lifts out of the down tube.
What maintenance does the full-suspension system need?+
Keep shock pivots clean and check fasteners. Inspect fork stanchions for scratches and have the system serviced annually or after heavy use.
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 Battery864 Wh PackHydraulic BrakesFull SuspensionFast Charge
Why Choose the HKM-7420499
Full Suspension for Comfort and Control
A front fork and rear shock keep the tires in contact with uneven surfaces, improving traction and reducing fatigue on long rides.
Fat Tires Expand Where You Can Ride
26 x 4.0 in tires float over sand and snow while smoothing out potholes and gravel on city streets.
Hydraulic Brakes Matched to the Speed
Hydraulic discs provide consistent stopping power with less hand fatigue than mechanical brakes, especially on long descents.
Fast Charging for Daily Use
A 3.5-hour charge time means the bike can be ready for an evening ride after a morning commute.
6061 Aluminum Frame
The aluminum frame balances strength and weight, resists corrosion, and supports the 330 lb load rating without excessive flex.
Throttle or Pedal-Assist Riding
Use the twist throttle when you want effortless power, or select an assist level and pedal to extend range.
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 pedal-assist levels
Twist Throttle
Right-hand grip; proportional response, works independently of 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 LCD
Light Switch
Long-press the up button to toggle the LED headlight and tail-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, 8-12 psi for sand/snow/gravel.
- Squeeze both brake levers. They should firm up before reaching the grip, with no sponginess.
- Confirm the battery is seated and locked, and that the display shows the expected state of charge.
- Spin both wheels and check that nothing rubs the brake pads or frame.
- Verify axle nuts and stem bolts are tight, and that the headset has no play.
- Test the throttle at walking pace in a clear area before riding in traffic or on technical trails.
- Switch on the headlight and tail-light if riding near dusk, and wear a helmet.
- Check that the suspension lockout is set appropriately for your route.
Quick Troubleshooting
The motor does not engage when I twist the throttle.+
Confirm the display is on, 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.
Range dropped noticeably compared with when it was new.+
Check tire pressure and temperature effects. If range remains down more than 30 percent year-round after many cycles, the pack may be near end of life.
The brakes feel spongy at the lever.+
Sponginess usually indicates air in the hydraulic line or a fluid leak. Have the system bled and inspected before riding at speed.
The chain skips under hard pedaling.+
The derailleur indexing is likely out of adjustment, or the chain and cassette are worn. Adjust the barrel adjuster a quarter turn at a time.
The front fork rattles over bumps.+
Check that the quick-release lever is fully closed and the wheel is seated. If the rattle persists, inspect the fork stanchions.
The display shows an error code.+
Power the system off, wait 30 seconds, and switch it back on. If the code returns, note it and contact support.
Certifications & Standards
The HKM-7420499 is produced in a facility operating under an ISO 9001 quality management system. The battery cells and 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 for lithium-ion shipping.
- 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 fat bike capable of 31 mph. Read the manual fully before the first ride and practice throttle response in an open area. Full suspension can mask rough terrain; reduce speed on unfamiliar surfaces.
- Wear a helmet on every ride.
- Do not exceed the 330 lb (150 kg) load capacity, including rider and cargo.
- Check local law before riding on public roads or paths.
- Bed in the brake pads with 10-15 progressive stops during the first few rides.
- Do not ride through water deep enough to reach the hub motor or battery.
- Charge only with the supplied charger, indoors, at room temperature, on a non-flammable surface.
- Do not attempt to open, puncture, or modify the battery pack.
- Reduce speed on gravel, wet surfaces, and downhill grades.
HKM-7420499 · 1000 W brushless rear hub motor · 48 V 18 Ah lithium (864 Wh) · 31 mph top speed · 31-50 mi range · 26 x 4.0 in fat tires · 330 lb (150 kg) load capacity · 6061 aluminum full-suspension frame · 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.
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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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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.
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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.
