Long-Range 16 in Fat-Tire Electric Mountain Bike
HKM-481043 Electric Mountain Bike
The HKM-481043 is built for distance. A 48 V 1000 W brushless rear hub motor drives 16 in fat tires through a 7-Speed drivetrain, while a high-capacity removable 48 V pack returns up to 93 mi (150 km) per charge. A 60 mm front suspension fork tames broken pavement and trail chop, mechanical disc brakes slow both wheels, and a steel frame rated for 331 lb of rider and cargo keeps the platform stable. A thumb throttle and 5 pedal-assist levels let you trade effort for range on every ride, and the bright LCD keeps speed, battery, and trip data in view.
1000 W 48 V Hub MotorHigh-Capacity 48 V Pack93 mi Range28 mph Top Speed16 in Fat Tires7-Speed DrivetrainMechanical Disc Brakes331 lb Load Capacity
Motor
1000 W
48 V rear hub
Battery
48 V Pack
High-capacity removable lithium
Top Speed
28 mph
45 km/h, throttle only
Range
93 mi
150 km, varies with assist
Tires
16 in
Fat tread, multi-surface
Load Capacity
331 lb
150 kg rider and cargo
Overview
The HKM-481043 centers on a steel mountain frame with a stable, upright ride position and a 331 lb combined rider-and-cargo load rating. The smaller 16 in fat-tire wheels lower the bike and shorten the wheelbase, which makes the bike nimble in tight spaces and easy to mount - a good fit for riders who want a confident, planted platform.
A 48 V 1000 W brushless rear hub motor delivers strong low-end pull for hill starts and quick acceleration from a stop. The motor is paired with a high-capacity 48 V lithium pack that is the headline of this bike: up to 93 mi (150 km) per charge under moderate pedal-assist. A thumb throttle gives immediate, clutch-free acceleration whenever you want it without pedaling.
Range is exceptional because the pack is sized for it. Throttle-only on flat pavement at moderate speed still returns a long distance thanks to the large energy budget. Moderate pedal-assist on the same terrain regularly reaches the full 93 mi. Cold weather, soft tires, heavier loads, and steep terrain all reduce those numbers; warmer months and firmer tires push them back up.
Comfort and control match the range. A 60 mm front suspension fork absorbs trail chop and broken pavement, while 16 in fat tires add grip and cushioning on gravel, wet pavement, and park paths. Mechanical disc brakes at both ends provide predictable stopping power, and the LCD shows speed, battery level, assist mode, and trip distance at a glance.
Key Features
1000 W 48 V Brushless Rear Hub Motor
A 1000 W brushless motor is laced directly into the rear wheel hub and runs on a 48 V system for strong, steady low-end torque. There is no mid-drive gearbox or extra chain in the drive path, so drive losses stay low and maintenance is limited to keeping the axle nuts torqued. Peak output pulls away confidently from a stop and climbs sustained grades with pedal assist.
High-Capacity 48 V Lithium Pack
The pack sits in the down tube behind a lockable cover and lifts out with a key for indoor charging. The large energy budget is what delivers up to 93 mi (150 km) per charge. A full recharge from empty takes about 5-7 hours on the supplied charger; partial top-ups take proportionally less.
60 mm Front Suspension Fork
A front fork with 60 mm of travel smooths out broken pavement and trail chop, taking the edge off the surfaces a rigid fork would transmit straight to the rider. Combined with the fat tires, the fork keeps the front wheel planted and the steering calm on rough ground.
Mechanical Disc Brakes, Front and Rear
Mechanical disc rotors at both ends deliver predictable stopping power in wet and dry conditions. Power-off brake levers cut motor drive the instant either lever is pulled - a meaningful safety feature on a 28 mph bike. Cable actuation is simple to adjust and service in the field.
7-Speed Drivetrain
A 7-Speed drivetrain with an index shifter gives usable pedaling cadence from walking pace up to cruising speed. The wide gear range is what lets heavier riders extend range and climb sustained grades without overheating the motor or battery.
16 in All-Terrain Fat Tires
The wide 16 in casing spreads rider weight over a large contact patch for stability and cushioning. The same tires add grip on gravel, wet pavement, and park paths where a narrower tire would skate around on the loose surface.
LED Headlight and Integrated Brake Light
A bright LED headlight runs off the main pack so there are no separate batteries to keep charged. A brake light that illuminates whenever either brake lever is pulled adds visibility from behind - useful in traffic and at dusk.
Rear Rack with Adjustable Kickstand
A sturdy rear cargo rack carries a backpack, pannier, or trail gear, and an adjustable kickstand holds the bike upright for charging and loading. Combined with the low frame, the bike is easy to live with day to day.
Full Specifications
Model
HKM-481043 | Electric Mountain Bike
Frame Material
High-tensile steel, mountain geometry
Motor
1000 W brushless rear hub motor, 48 V system
System Voltage
48 V DC
Battery
48 V lithium-ion, removable and lockable (high-capacity)
Charger
2 A smart charger, 100-240 V input
Charging Time
5-7 hours from empty
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity
Top Speed
28 mph (45 km/h)
Range Per Charge
93 mi (150 km), varies with terrain, rider weight, and assist level
Climbing Grade
Strong hill-climb ability with pedal assist on sustained grades
Peak Torque
High-torque hub output, optimized for hill starts
Drivetrain
7-Speed derailleur with index shifter
Brakes
Mechanical disc brakes, front and rear, with power-off levers
Suspension
60 mm travel front suspension fork
Tires
16 in fat tires, knobby all-terrain tread
Wheels
16 in alloy rims, stainless spokes
Saddle
Mountain saddle with adjustable seat post
Display
Backlit LCD: speed, battery level, assist mode, trip distance, odometer
Throttle
Thumb 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 and cargo
Bike Weight
Approximately 70 lb (32 kg) including battery
Recommended Rider Height
5 ft 3 in to 6 ft 4 in (160-193 cm)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The high-capacity 48 V pack is the headline of this bike. Sized well above typical commuter packs, it returns up to 93 mi (150 km) per charge under moderate pedal-assist - enough for long weekend rides or a full work week of commuting between charges.
Real-world range depends on how much you pedal, rider and cargo weight, tire pressure, and terrain. Throttle-only riding at moderate speed still covers a long distance thanks to the large energy budget. Moderate pedal-assist on level pavement regularly reaches the full 93 mi. Cold weather below 40 F (4 C) temporarily reduces available 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 a few 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 - the charge port is accessible from the drive side without removing anything.
Daily Use & Care
- Tire pressure sets the character of the bike. Run 15-20 psi on pavement for lower rolling resistance; drop to 10-12 psi for gravel and dirt 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 steel fasteners over time if left in place.
- 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.
- 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. Mechanical 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-481043 electric mountain bike, approximately 85 percent pre-assembled
- 1 x High-capacity 48 V removable lithium battery pack
- 1 x 2 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 Rear cargo rack (pre-installed)
- 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. Have a bike shop check torque and brake bedding if you are not comfortable doing it yourself.
What is the actual range I should plan for?+
Plan for up to 93 mi (150 km) under moderate pedal-assist, and a long distance even throttle-only thanks to the large pack. Heavier riders, headwinds, hills, and low tire pressure all reduce range; firm tires and warm weather push it back up.
Is a license or registration required?+
Rules vary by state and locality. A 1000 W motor and 28 mph top speed exceeds the limits of the common three-class e-bike framework in many US jurisdictions, which may place this bike in a moped or motor-driven cycle category. Check your state DMV and local ordinances before riding on public roads or bike paths.
How long does the battery take to charge?+
About 5-7 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 7-Speed drivetrain works independently of the motor. The bike is heavy at approximately 70 lb, so pedaling home unassisted is slow going, but it is entirely possible on flat ground.
Will the brakes handle the speed and the load?+
Mechanical disc brakes front and rear are a solid specification for a 28 mph bike of this weight. Bed the pads in during the first few rides with 10-15 progressive stops from moderate speed. With a load, brake earlier than you would solo.
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
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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.
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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.
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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 BatteryLong-Range PackMechanical Disc Brakes7-Speed Drivetrain331 lb Load
Why Choose the HKM-481043
Built for Distance
A high-capacity 48 V pack and an efficient 1000 W hub motor combine for up to 93 mi (150 km) per charge. You can run errands all week or take a long weekend ride on the same bike without hunting for an outlet.
60 mm Front Suspension
Potholes, expansion joints, and trail shortcuts become rideable surfaces when the front fork absorbs what a rigid frame would transmit directly to the rider. The fat tires add a second layer of cushioning.
Two Ways to Ride
Press the thumb throttle for immediate acceleration, or pedal through the 5 assist levels and 7 gears. Most owners mix both - throttle to get moving, pedals to extend the range, and motor 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 to maintain and a notably quiet ride.
Low, Stable Platform
The 16 in fat-tire wheels and steel frame lower the center of gravity for a planted, confident feel. The bike fits a wide range of rider sizes and is easy to mount and dismount.
Built for Daily Use, Not Just Weekends
Sealed electrical connectors, a covered and lockable battery compartment, and brake lines that resist road film all make sense for a bike that gets ridden to work every day and parked outside.
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
Thumb 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 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 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 excessive slack in the cables.
- 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 axle nuts and stem bolts 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 load.
- 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 on the rear rack, confirm the load is secured before you set off.
Quick Troubleshooting
The motor does not engage when I press 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 or the lever pulls to the bar.+
On a mechanical system, sponginess usually means the cable needs adjustment or the pads are worn. Turn the barrel adjuster a quarter turn at a time, and replace pads when the friction material is under 1 mm. Do not ride a 28 mph bike on compromised brakes.
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 to align the indexing. If the chain skips only in the smallest cogs, the cassette is worn and should be replaced along with 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 and have a shop rebuild the lowers if needed.
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 - error codes map to specific faults in the controller, motor, or throttle circuits.
Certifications & Standards
The HKM-481043 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. If you will be carrying cargo on the rear rack, practice solo first - loaded braking distances are noticeably longer.
- 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 331 lb (150 kg) load capacity, which includes the rider and cargo.
- Check local law before riding on public roads or paths. A 1000 W motor 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 a load.
- 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-481043 · 1000 W 48 V brushless rear hub · high-capacity 48 V lithium pack · 28 mph top speed · up to 93 mi (150 km) range · 16 in fat tires · 331 lb (150 kg) load capacity · steel mountain frame · 60 mm front suspension · mechanical disc brakes · 7-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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