Lightweight Electric Off-Road Dirt Bike
HKM-6137555 Electric Dirt Bike
The HKM-6137555 is a 60 V electric dirt bike built for teens and adult riders who want real off-road ability without a gas engine. A 3500 W brushless motor drives the rear wheel through a chain final drive, and 14 in knobby tires put the contact patch where it matters on dirt, hardpack, and rocky trails. The aluminum frame keeps weight down for control, hydraulic disc brakes provide strong stops, and an LCD display shows speed and battery status at a glance.
3500 W Brushless Motor60 V System40 mph Top Speed14 in Off-Road TiresAluminum FrameHydraulic Disc BrakesLCD Display330 lb Load Capacity
Motor
3500 W
brushless off-road motor
Battery
60 V pack
removable lithium, capacity per build
Top Speed
40 mph
65 km/h
Range
20-30 mi
32-48 km, estimated
Tires
14 in
off-road knobby tread
Load Capacity
330 lb
150 kg rider
Overview
The HKM-6137555 is built around a lightweight aluminum frame tuned for off-road control. The low seat height and compact wheelbase make it a good fit for newer riders learning trails, while the 3500 W motor gives enough power for confident climbs and open sections once skills build.
Power comes from a 60 V brushless motor turning the rear wheel through a chain final drive. The twist throttle delivers smooth, proportional acceleration with no clutch, and the motor holds speed up gradual grades without bogging. Peak output is enough to clear small jumps and technical steps with a solo rider.
Range depends on how the bike is ridden. Throttle-only exploring on varied terrain returns the lower end of the band; steadier moderate-speed riding stretches it toward the top. Cold weather, soft tires, a heavy rider, and steep terrain all reduce distance, so plan shorter loops until you learn the bike's real-world numbers.
Hardware is chosen for dirt. A long-travel front fork and rear shock absorb roots and whoops, hydraulic disc brakes provide consistent stopping on the way down, and 14 in knobby tires bite into loose surfaces. The LCD keeps speed and battery in view so you are not surprised by a low pack on a long loop.
Key Features
3500 W Brushless Off-Road Motor
A 3500 W brushless motor delivers strong low-end torque for quick acceleration and confident climbing on dirt. With no clutch and a direct chain final drive, response is immediate and predictable - good for newer riders building skill. Peak output clears small obstacles and technical steps with a solo rider.
60 V Removable Lithium Pac
The pack sits in the frame and lifts out with a key for indoor charging. Capacity varies by build; a full recharge from empty takes several hours on the supplied charger. Partial top-ups take proportionally less time.
Long-Travel Front Fork and Rear Shock
A long-travel front fork and a rear shock absorber soak up roots, whoops, and drop-offs so the rider stays in control on rough trails. The combination is what lets a light dirt bike feel stable instead of skittish over broken ground (travel per build).
Hydraulic Disc Brakes, Front and Rear
Hydraulic disc brakes at both wheels give strong, fade-resistant stopping power in dust and mud. Lever effort stays light and predictable, and power-off levers cut motor drive the instant either brake is pulled - a meaningful safety feature on a 40 mph dirt bike.
Chain Final Drive
The motor drives the rear wheel through a simple chain final drive. There are no derailleur gears to index, which keeps maintenance low and the rear end clean through mud and grit.
14 in Off-Road Knobby Tires
Compact 14 in knobby tires keep the bike agile on tight trail sections and quick to change direction. The aggressive tread bites into dirt, hardpack, and rocky surfaces while shedding mud efficiently.
LED Lighting
A bright LED headlight runs off the main pack for low-light trails and dusk riding, with a brake-activated tail light adding visibility from behind. No separate batteries to keep charged.
Rear Grab Handle and Compact Seat
A compact saddle with a rear grab handle makes it easy for a passenger or spotter to hold on during slow sections, and gives a secure handhold when loading the bike onto a rack or lifting it over obstacles.
Full Specifications
Model
HKM-6137555 | Electric Dirt Bike
Frame Material
Aluminum alloy, off-road dirt-bike geometry
Motor
3500 W brushless off-road motor
System Voltage
60 V DC
Battery
60 V lithium-ion pack (capacity not published; estimated 20-30 Ah)
Charger
Smart charger, 100-240 V input (supplied)
Charging Time
Approximately 6-9 hours from empty (estimated)
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity (typical)
Top Speed
40 mph (65 km/h)
Range Per Charge
20-30 mi (32-48 km, estimated), varies with terrain, rider weight, and speed
Climbing Grade
Up to approximately 30 degrees with a solo rider (estimated)
Peak Torque
High-torque brushless motor with strong low-speed output
Drivetrain
Chain final drive to rear wheel
Brakes
Hydraulic disc brakes, front and rear, with power-off levers
Suspension
Long-travel front fork + rear shock absorber
Tires
14 in off-road knobby tires
Wheels
14 in alloy rims with stainless spokes
Saddle
Compact off-road saddle with grippy cover
Display
LCD: speed, battery level, and trip readout
Throttle
Twist-grip throttle, proportional response
Lighting
LED headlight, brake-activated tail light, powered by main battery
Load Capacity
330 lb (150 kg) rider
Bike Weight
Approximately 110 lb (50 kg) including battery (estimated)
Recommended Rider Height
4 ft 10 in to 6 ft 0 in (147-183 cm, estimated)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The HKM-6137555 runs on a 60 V removable lithium pack. Capacity varies by build; the energy budget is sized for a full session of trail riding rather than long-distance commuting. Removing the pack for indoor charging keeps it out of the weather and makes the bike easy to store.
Real-world range depends on terrain, rider weight, tire pressure, and how aggressively you use the throttle. Steady moderate-speed riding returns the longest distance; throttle-heavy exploring on steep, loose trails shortens it. Cold weather below 40 F (4 C) temporarily reduces available capacity and 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 compared with charging in an unheated garage.
The pack unlocks with the supplied key and lifts out of the frame in a few seconds for indoor charging. Two keys are included. Charging with the pack installed works equally well through the frame-side charge port.
Daily Use & Care
- Check tire pressure before each ride for the terrain - lower for loose dirt, higher for hardpack.
- Rinse the frame, rims, and drivetrain with fresh water after every muddy or dusty ride.
- Confirm both axle nuts and the stem bolts are torqued before the first ride of each week.
- Lubricate the drive chain every 100-150 mi, or after any ride through standing water or dusty conditions.
- Inspect brake pad thickness monthly and replace when the 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 parked outside so moisture stays out of the connectors.
What's in the Box
- 1 x HKM-6137555 electric dirt bike, approximately 85 percent pre-assembled
- 1 x 60 V removable lithium battery pack
- 1 x Smart charger with 100-240 V input
- 2 x Battery keys
- 1 x Toolkit with hex wrenches and basic spanners
- 1 x Pair of mirrors (where required by local law)
- 1 x Front and rear lighting set (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 mirrors and saddle, and checking brake alignment. Budget 30-45 minutes with the supplied tools. Have a shop check torque and brake bedding if you are not comfortable doing it yourself.
Is this bike suitable for a younger or newer rider?+
Yes, within the 330 lb load rating. The low seat and light aluminum frame make it approachable for teens and newer riders, while the 3500 W motor gives room to grow. Start in an open area and build skill before attempting technical trails.
What range should I plan for?+
Plan for the lower end of the estimated 20-30 mi band on mixed trail riding, and treat the top as the upper bound on steady terrain. Heavier riders, hills, and throttle-heavy riding all reduce range.
Is a license or registration required?+
Rules vary by state and locality. A 3500 W motor with 40 mph top speed exceeds the limits of the common three-class e-bike framework in many US jurisdictions and may place this bike in an off-road or motorcycle category. Check your state DMV and local ordinances before any public- road use.
How long does the battery take to charge?+
About 6-9 hours from fully empty with the supplied charger (estimated). 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?+
No. The HKM-6137555 is throttle-only with a chain final drive and no pedals, so plan rides within the pack's range and carry the charger on longer day trips.
Will the brakes handle the speed on a trail?+
Hydraulic disc brakes front and rear are the right specification for a 40 mph dirt bike. Bed the pads in during the first few rides with 10-15 progressive stops before riding at full speed or on steep descents.
Is the battery removable for indoor charging?+
Yes. It unlocks with the supplied key and lifts out of the frame. 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 Battery3500 W MotorHydraulic Brakes14 in TiresAluminum Frame
Why Choose the HKM-6137555
Trail-Ready, Light, and Controllable
A light aluminum frame, low seat, and compact wheels make the HKM-6137555 easy to control for newer riders while still capable on real trails. It is a practical step up from a toy and a sane intro to off-road riding.
Built for Dirt
A long-travel front fork, a rear shock, and 14 in knobby tires make roots, whoops, and loose climbs rideable. The bike stays composed instead of skittish when the surface breaks up.
Throttle-Only Simplicity
Twist the throttle for immediate, clutch-free acceleration with no gears to shift. The simple chain final drive means fewer parts to maintain and a quiet ride through the woods.
Quiet Electric Drive
The brushless motor is far quieter than a gas engine, so you can ride trails that restrict combustion vehicles and hear the trail around you. Low noise also means less friction with neighbors and land managers.
Compact and Easy to Transport
The 14 in wheels and light frame make the bike easy to lift onto a rack or into a truck, and simple to store in a garage or shed between rides.
Built for the Elements
Sealed electrical connectors and a lockable battery compartment make sense for a bike ridden through dust, mud, and the occasional creek crossing. Keep the charge port covered when parked out in the weather.
Controls & Indicators
Power Button
Located on the battery pack; hold to switch the system on and off
Mode Buttons
Display buttons cycle through speed, trip, and battery readouts
Twist Throttle
Right-hand grip; proportional response, works independently of assist
Speedometer
Live speed readout in mph, switchable to km/h in the settings menu
Battery Gauge
Charge indicator plus percentage readout on the LCD
Light Switch
Toggle the LED headlight and integrated brake light from the display
Handlebar Controls
Mirror and brake-lever position adjust for rider reach and comfort
Pre-Ride Safety Checklist
- Check tire pressure and set it for the terrain: lower for loose dirt, higher for hardpack.
- Squeeze both brake levers. They should firm up well 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 the rims run true and nothing rubs the brake pads or the frame.
- Verify the axle nuts are tight and 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 technical trail or with a passenger.
- Switch on the headlight and tail light if riding near dusk, and wear a helmet rated for the speeds this bike reaches.
- If carrying a passenger, confirm total weight is under 330 lb and the load is secured before mounting.
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 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 40 mph bike on compromised brakes.
The chain skips or jumps under load.+
The drive chain may need tension adjustment or lubrication. Clean and lube it, then check tension. If it skips only under hard acceleration, inspect the rear sprocket for wear and replace if needed.
The front fork or shock feels off.+
Check that the front wheel is seated and the axle is tight. If the suspension still feels wrong after a setting change, have a shop inspect the seals and valving for wear.
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-6137555 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 dirt bike capable of 40 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 appropriate off-road protective gear on every ride.
- Wear a helmet and off-road protective gear on every ride. At 40 mph a bicycle helmet is the minimum; a certified motocross helmet and body armor are strongly recommended.
- Do not exceed the 330 lb (150 kg) load capacity, which includes the rider and any passenger.
- Check local law before riding on public roads or paths. A 3500 W motor with 40 mph top speed may place this vehicle outside standard e-bike classifications and in an off-road or motorcycle category.
- Bed in the brake pads with 10-15 progressive stops during the first few rides before riding at full speed or on steep descents.
- Do not ride through water deep enough to reach the 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 loose, wet, or steep terrain; knobby tires add grip but do not eliminate the risk of losing traction.
HKM-6137555 · 3500 W brushless off-road motor · 60 V lithium pack · 40 mph top speed · 14 in off-road tires · 330 lb (150 kg) load capacity · aluminum frame · hydraulic disc brakes · LCD display. Specifications are provided for reference; some values are estimated where the manufacturer did not publish a measured datasheet. 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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