26 in Dual-Motor Fat Tire E-Bike
HKM-4163795 Fat Tire Electric Mountain Bike
The HKM-4163795 mounts two 1000 W peak hub motors - 2000 W combined - for serious climbing, backed by a 48 V 25 Ah pack (about 1200 Wh) good for 120-150 km of pedal assist. Full hydraulic suspension, dual-piston hydraulic disc brakes, and 26 x 4.0 in fat tires make it a confident all-terrain machine, CE and UKCA certified.
2000W Peak Dual Motor48 V 25 Ah / 1200 Wh75-93 mi Range26 x 4.0 in Fat TiresFull SuspensionDual-Piston Hydraulic BrakesShimano 7-SpeedCE / UKCA
Motor
2000 W Peak
Dual hub, 2 x 1000 W
Battery
48 V 25 Ah
About 1200 Wh lithium-ion
Top Speed
31 mph
50 km/h off-road; 25 km/h road
Range
75-93 mi
120-150 km pedal assist
Tires
26 x 4.0 in
Fat-profile all-terrain tires
Load Capacity
440 lb
200 kg rider plus cargo
Overview
Two motors beat one on the hills. The HKM-4163795 drives both wheels with a pair of 1000 W peak hub motors - 2000 W combined, 160 Nm total - so steep grades and loose surfaces that would stall a single-motor bike are just another climb. Switch between single and dual motor to trade power for range as the terrain demands.
A 48 V 25 Ah pack stores about 1200 Wh, enough for 120-150 km of pedal assist (60-70 km throttle-only), and a 3 A charger refreshes it in about 7 hours. Full hydraulic suspension - lockable adjustable fork plus a hydraulic rear shock - absorbs bumps front and rear, while 26 x 4.0 in fat tires grip gravel, mud, snow, and city streets.
Dual-piston hydraulic disc brakes give strong, consistent stopping in all weather, and a Shimano 7-speed drivetrain covers climbs and fast sections. LED front and rear lights with an automatic brake light keep you visible. The bike is CE and UKCA certified for the EU and UK market.
Key Features
2000 W Peak Dual Motors
Two 1000 W peak hub motors (80 Nm each, 160 Nm combined) drive both wheels for serious climbing - up to 40 degrees. Switch between single and dual motor to balance power and range on the fly.
48 V 25 Ah Lithium Pack (About 1200 Wh)
A high-capacity 48 V 25 Ah pack stores about 1200 Wh and is managed by an intelligent BMS that protects against overcharge, over-discharge, short circuit, and thermal runaway. A 3 A charger refills it in about 7 hours.
Full Hydraulic Suspension
A lockable, adjustable hydraulic front fork plus a hydraulic rear shock absorb bumps front and rear, so the bike stays composed on rough ground and comfortable on long rides. Lock the fork for efficient climbing.
Dual-Piston Hydraulic Disc Brakes
Dual-piston hydraulic disc brakes deliver precise, powerful stopping in all weather, with an automatic brake light for visibility. The brake light illuminates the moment you slow, warning traffic behind you.
Shimano 7-Speed Drivetrain
A Shimano 7-speed rear derailleur gives crisp shifts for climbs, flats, and descents. Keeping the right gear also keeps the motors in their efficient band, which protects range.
26 x 4.0 in Fat Tires
Oversized all-terrain casings grip gravel, mud, snow, and city streets, and float over soft surfaces where a narrow tire would sink. The air volume works as natural suspension over small chatter.
LED Lighting Front and Rear
Bright LED front and rear lights - with an automatic brake light - draw from the main pack, so there are no separate cells to keep charged before a ride home in the dark.
Aluminum Frame with Touring Kit
An aluminum 17 in frame carries a lock, fenders, pump, and toolkit as standard, so the bike is ready for commuting and weekend adventures. Balanced geometry keeps it stable at speed.
Full Specifications
Model
HKM-4163795 | Fat Tire Electric Mountain Bike
Frame Material
Aluminum alloy, 17 in frame size
Motor
Dual 2000 W peak (2 x 1000 W, 80 Nm each, 160 Nm total)
System Voltage
48 V DC
Battery
48 V 25 Ah lithium-ion (about 1200 Wh) with BMS
Charger
3 A smart charger, 100-240 V input
Charging Time
About 7 hours
Battery Protection
BMS guards overcharge, over-discharge, short circuit, thermal
Top Speed
31 mph (50 km/h) off-road; 25 km/h road limit
Range Per Charge
75-93 mi (120-150 km) pedal assist; 37-43 mi (60-70 km) throttle
Climbing
Up to 40 degrees
Motor Efficiency
Brushless commutation, low heat
Drivetrain
Shimano 7-speed rear derailleur
Brakes
Dual-piston hydraulic disc brakes
Suspension
Full hydraulic suspension, front and rear
Tires
26 x 4.0 in fat all-terrain tires
Wheels
26 in rims with reinforced spokes
Saddle
Padded saddle, upright adjustable position
Display
LCD: speed, battery, distance, assist
Assist System
3 modes, 5-level pedal assist
Lighting
LED front and rear, automatic brake light
Load Capacity
440 lb (200 kg) rider plus cargo
Bike Weight
About 94 lb (42.5 kg) including battery
Rider Height
165-205 cm (5 ft 5 in - 6 ft 9 in)
Warranty
24 Months Warranty Service (parts and labor)
Battery, Range, and Charging
The 48 V 25 Ah pack stores about 1200 Wh and is managed by an intelligent battery management system that protects against overcharge, over-discharge, short circuit, and thermal runaway. A 3 A charger refills it in about 7 hours - ideal for an overnight top-up.
Quoted range is 120-150 km (75-93 mi) with pedal assist, or 60-70 km (37-43 mi) throttle-only. Reaching the upper end means flat pavement, moderate assist levels, correct tire pressure, and a rider of average weight; gradient, headwind, and higher assist settings all move you toward the lower figure. Cooler temperatures temporarily reduce available capacity, which returns as the pack warms.
Tip: Store the pack at 40-80 percent charge in a cool, dry place when the bike will not be ridden for a while, and avoid routinely running it below 10 percent. Both habits measurably extend the usable life of lithium-ion cells.
The supplied 3 A charger takes the pack from empty to full in about 7 hours. The BMS terminates charging automatically once the cells reach full voltage, so the pack can be left connected overnight without risk.
Daily Use & Care
- Check tire pressure before each ride and keep it within the range printed on the tire sidewall; correctly inflated fat tires are the biggest factor in range and handling.
- Keep the chain clean and lightly lubricated; grit ground into a dry chain wears the drivetrain far faster than the mileage alone suggests.
- Bleed and inspect the hydraulic brake system periodically; have a professional service it if the lever feels soft.
- Check the suspension air pressure and lockout settings for your weight and the terrain before each ride.
- Rinse mud and grit off the frame, rotors, and drivetrain after wet or off-road rides, then dry the rotors with a few light brake applications.
- Store the battery at 40-80 percent charge in a cool, dry place whenever the bike will sit unused for more than a few days.
- Book an annual professional tune-up to check wheel true, suspension play, and drivetrain wear.
What's in the Box
- 1 x HKM-4163795 fat tire electric bike (largely pre-assembled)
- 1 x 48 V 25 Ah lithium battery pack
- 1 x 3 A smart charger
- 1 x Toolkit for assembly and adjustment
- 1 x Frame lock
- 1 x Mudguard set
- 1 x Tire pump
- 1 x User manual
Frequently Asked Questions
How does the dual motor help?+
Two 1000 W peak hub motors drive both wheels, giving 2000 W combined and 160 Nm of torque for climbs up to 40 degrees that would stall a single-motor bike. Switch to single motor to save range on easy ground.
How far does it go on a charge?+
120-150 km (75-93 mi) with pedal assist, or 60-70 km throttle-only. Rider weight, gradient, assist level, tire pressure, temperature, and wind all affect the number; flat pavement at moderate assist reaches the upper end.
How long does charging take?+
About 7 hours from empty with the supplied 3 A charger. The BMS stops charging automatically at full voltage, so it is safe to leave the pack plugged in overnight.
What terrain will the fat tires handle?+
Gravel, mud, snow, sandy paths, and city streets. The 26 x 4.0 in casing floats on soft surfaces where a narrow tire would sink. For rocky sections, lower the pressure so the casing can conform.
Is the full suspension worth it?+
Front and rear hydraulic suspension absorbs bumps at both wheels, so the bike stays composed on rough ground and comfortable on long rides. Lock the fork for efficient climbing on smooth roads.
Can I ride it with the motor off?+
Yes. Set the assist to zero and the bike works as a conventional 7-speed bicycle. It weighs more than a non-electric bike, so a steep climb takes real effort, but the gearing helps considerably.
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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.
2000W Peak Dual48V 25Ah1200 Wh26x4.0 FatFull SuspensionDual-Piston HydraulicShimano 7-SpeedCE / UKCA
Why Choose the HKM-4163795
Two Motors, No Hill Too Steep
Dual hub motors put power at both wheels, so 40-degree climbs that stop other e-bikes become just another gradient. Switch to single motor on flat ground to stretch the range.
Float Where Narrow Tires Sink
On sand, snow, and loose gravel the advantage of a 26 x 4.0 in fat tire is that the wheel stays on top of the surface. That is what opens up beaches, forest tracks, and winter paths to ordinary riding.
Assist That Follows Your Effort
Five pedal-assist levels scale the motor contribution to what you are already doing rather than delivering a sudden surge. It feels like strong legs, not like being pushed.
Nothing Inside the Motor to Wear Out
Brushless commutation removes the carbon brushes that wear and heat. The motors run quietly, stay cooler under load, and need no internal servicing across the life of the bike.
Aluminum That Stays Presentable
An aluminum alloy frame resists corrosion naturally, so winter salt and wet trails do not leave their mark. It also keeps the bike light enough to maneuver despite the twin motors.
A Saddle Built for Real Distance
A padded saddle with an adjustable upright position reduces lower-back and shoulder strain on longer rides, and balanced geometry keeps the bike stable at speed without making low-speed manoeuvring heavy.
Controls & Indicators
Power Button
On the battery pack; hold to switch the system on and off
Assist Buttons
Up and down buttons cycle through the 5 assist levels and motor modes
Trip Meter
Trip distance and cumulative odometer on the display
Speedometer
Live speed readout in mph, switchable to km/h
Battery Gauge
Remaining capacity indicator driven by the battery management system
Light Switch
Toggle the LED lights and brake light from the control pod
Shifter
Thumb shifter for the Shimano 7-speed drivetrain
Pre-Ride Safety Checklist
- Set tire pressure for the ride ahead, within the range marked on the tire sidewall.
- Squeeze both brake levers and confirm the pads bite firmly well before the lever reaches the grip.
- Check the battery is seated, locked, and showing the capacity you expect on the display.
- Spin both wheels to confirm the rims run true and nothing rubs the pads or the frame.
- Check the suspension lockout and air pressure for your weight and the terrain.
- Shift through all 7 gears at low speed to confirm the drivetrain indexes cleanly.
- Select a low assist level for the first minute of riding until you have the feel of the power delivery.
- Wear a helmet, and add gloves and eye protection for off-road riding where debris is a factor.
Quick Troubleshooting
The motor will not engage.+
Confirm the display is on and showing capacity, the battery is locked in place, and both brake levers are fully released - the cut-off sensors disable the motor while a lever is pulled. Note any diagnostic code shown on the display before contacting support.
Range has dropped compared with when the bike was new.+
Check tire pressure first - a soft fat tire on tarmac is the single most common cause. Then consider temperature; cool conditions temporarily reduce capacity. If range is down sharply year-round after many cycles, a pack may be nearing the end of its life.
The brakes feel soft or weak.+
Hydraulic brakes may need bleeding if the lever pulls close to the grip. Have a professional bleed the system; do not ride with compromised brakes.
The chain skips under hard pedalling.+
Either the drivetrain indexing has drifted or the chain and cassette are worn. Adjust the barrel adjuster a quarter turn at a time. If it skips only in the smallest cogs, replace the cassette together with the chain.
The bike feels vague or wanders at speed.+
Front tire pressure that is too low is the usual cause on a fat bike. Check pressure, then check for headset or suspension play by rocking the bike with the front brake applied.
The display shows a diagnostic code and the system will not run.+
Switch 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 - codes map to specific faults in the controller, motors, sensors, or battery circuits.
Certifications & Standards
The HKM-4163795 is certified for the EU and UK market (CE / UKCA). The lithium cells and the assembled pack carry the test documentation normally required for lithium-ion transport and sale.
- CE - European Conformity marking for the electrical assembly.
- UKCA - UK Conformity Assessed marking for the UK market.
- ISO 9001 - Quality management system certification of the manufacturing facility.
- 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.
Important Safety Notes
This bike reaches up to 31 mph (50 km/h) off-road and weighs around 94 lb before a rider is added, so braking distances are much longer than on a conventional bicycle. The 50 km/h top speed is for off-road use only; on public roads the bike is limited to 25 km/h. Read the manual before the first ride, begin on a low assist level, and get a feel for the acceleration and stopping distance in an open area first.
- Wear a helmet on every ride, and add gloves and eye protection for off-road riding.
- Do not exceed the 440 lb (200 kg) load capacity, which includes the rider and all cargo.
- On public roads, keep the bike within the local speed limit (25 km/h / 15.5 mph) and follow e-bike classification rules; the 50 km/h mode is for private land and off-road use only.
- Bed the brake pads in with progressive stops from moderate speed during the first rides.
- Do not submerge the bike or use a pressure washer on the motors, battery compartment, or bearings.
- Charge only with the supplied charger, indoors, at room temperature, on a non-flammable surface.
- Do not open, puncture, or modify the battery pack. Damaged lithium cells can vent and ignite.
- Reduce speed on wet surfaces, loose gravel, and descents. Fat tires add grip but do not remove the risk of a slide.
HKM-4163795 · dual 2000 W peak hub motors (2 x 1000 W, 160 Nm) · 48 V 25 Ah lithium (about 1200 Wh) · 31 mph (50 km/h) off-road top speed, 25 km/h road · 75-93 mi (120-150 km) pedal-assist range · 26 x 4.0 in fat tires · full hydraulic suspension · dual-piston hydraulic disc brakes · Shimano 7-speed · aluminum frame · CE / UKCA · 440 lb (200 kg) load capacity. The 50 km/h mode is for off-road / private-land use only; observe local road speed limits. 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 - confirm local regulations before riding on public roads or paths.
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