Front-Fork Electric Fat Tire Mountain Bike
HKM-5613267 Electric Fat Tire Mountain Bike
The HKM-5613267 pairs a 750 W brushless rear hub motor with a 48 V 13 Ah (624 Wh) lithium pack in a steel fat-tire frame. The 20 x 4 in tires roll over gravel and city streets, while a front suspension fork takes the edge off bumps. A 7-Speed drivetrain and disc brakes make it a versatile bike for commuting and light off-road use.
750 W Rear Hub Motor48V 13Ah / 624 WhUp to 31 mph Top Speed20 x 4 in Fat TiresFront Suspension Fork7-SpeedDisc BrakesSteel Frame
Motor
750 W
rear hub, brushless, 60-70 Nm
Battery
48V 13Ah
624 Wh lithium, removable
Top Speed
Up to 31 mph
30-50 km/h
Range
Up to 37 mi
60 km per charge
Tires
20 x 4 in
fat tread, multi-surface
Load Capacity
101 lb
46 kg per product listing
Overview
The HKM-5613267 is built around a steel fat-tire frame with a low standover for easy mounting. The wide bars and upright position suit riders moving between city streets and light trails.
Underneath is a 750 W brushless rear hub motor rated for 60-70 Nm of torque, fed by a 48 V 13 Ah (624 Wh) lithium pack. The twist throttle gives immediate acceleration; a 7-Speed derailleur lets you add human power to extend the range.
Real-world range reaches up to about 37 mi (60 km) per charge. Throttle-only riding shortens it; moderate pedaling stretches it. Cold weather and soft tires reduce those numbers.
Comfort comes from a front suspension fork that absorbs the sharp hits up front, plus the cushioning of the 20 x 4 in tires. The bike is rated for a 46 kg load capacity per the product listing, which suits a single rider with light cargo.
Key Features
750 W Brushless Rear Hub Motor
A 750 W brushless motor rated for 60-70 Nm of torque is laced into the rear wheel hub. There is no chain or belt between the motor and the ground, so drive losses stay low and maintenance is limited to keeping the axle nuts torqued.
48V 13Ah Lithium Battery (624 Wh)
The 48 V 13 Ah pack stores 624 Wh of energy and lifts out with a key for indoor charging. A full recharge takes 3-10 hours on the supplied charger; partial top-ups take proportionally less.
Front Suspension Fork
A front suspension fork absorbs roots, rocks, and braking bumps, keeping the front wheel tracking instead of chattering over rough ground.
Disc Brakes
Mechanical disc brakes at both ends give reliable stopping power in wet and dry conditions, with pads that are simple to inspect and replace.
7-Speed Drivetrain
A 7-Speed drivetrain with an index shifter gives usable pedaling cadence from walking pace up to cruising speed.
20 x 4 in All-Terrain Fat Tires
Run at low pressure the wide casing spreads rider weight over a large contact patch, adding grip and comfort on gravel, wet pavement, and park paths.
LED Headlight
A bright LED headlight runs off the main pack so there are no separate batteries to keep charged.
Rear Rack and Frame Mounts
Frame mounts and a rear rack carry daily cargo within the rated load capacity.
Full Specifications
Model
HKM-5613267 | Electric Fat Tire Mountain Bike
Frame Material
High-tensile steel, mountain-bike geometry
Motor
750 W brushless rear hub motor, 60-70 Nm torque
System Voltage
48 V DC
Battery
48 V 13 Ah lithium-ion (624 Wh), removable and lockable
Charger
Smart charger, 100-240 V input
Charging Time
3-10 hours from empty
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity
Top Speed
Up to 31 mph (30-50 km/h)
Range Per Charge
Up to 37 mi (60 km), varies with terrain, rider weight, and assist level
Climbing Grade
Up to approximately 30 degrees with a solo rider
Peak Torque
60-70 N.m
Drivetrain
7-Speed derailleur with index shifter
Brakes
Mechanical disc brakes, front and rear
Suspension
Front suspension fork
Tires
20 x 4 in fat tires, knobby all-terrain tread
Wheels
20 in alloy rims, stainless spokes
Saddle
Trail saddle with grippy cover
Display
Backlit LCD: speed, battery level, assist mode, trip distance, odometer
Throttle
Twist-grip throttle with pedal-assist and zero assist
Lighting
LED headlight, powered by main battery
Load Capacity
101 lb (46 kg) rider plus cargo, per product listing
Bike Weight
Approximately 93 lb (42 kg) including battery
Recommended Rider Height
5 ft 3 in to 6 ft 2 in (160-188 cm)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The HKM-5613267 runs a 48 V 13 Ah pack that stores 624 Wh of energy. The 48 V architecture keeps current draw reasonable while still delivering the punch a 750 W motor wants.
Real-world range reaches up to about 37 mi (60 km) per charge. Throttle-only riding shortens it; moderate pedal-assist stretches it. Cold weather below about 40 F (4 C) temporarily reduces available capacity.
Tip: Store the pack between 30 and 70 percent charge if the bike will sit unused for more than a month, and top up every 4-6 weeks. Charge indoors at room temperature to extend pack life.
The pack unlocks with the supplied key and lifts out for indoor charging, so the bike can stay locked outside. Charging with the pack installed works equally well through the frame-side port.
Daily Use & Care
- Set tire pressure for the terrain: low for dirt and gravel, firmer for pavement.
- Rinse the frame, rims, and drivetrain with fresh water after riding on salted roads or wet gravel.
- Check axle nuts and stem bolts are torqued before the first ride of each week.
- Wipe and re-lubricate the chain every 100-150 mi or after wet or dusty rides.
- Inspect brake pad thickness monthly; replace when under 1 mm.
- Charge indoors at room temperature and unplug once the indicator turns green.
- Keep the charge port covered when parked outside so moisture stays out.
What's in the Box
- 1 x HKM-5613267 electric fat tire mountain bike, approximately 85 percent pre-assembled
- 1 x 48V 13Ah 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 Rear 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.
What range should I plan for?+
Plan for up to about 37 mi (60 km) depending on how much you pedal. Throttle-only riding at higher speeds lands at the low end. Moderate pedal-assist stretches it. Heavier riders, headwinds, and hills all reduce range.
Is a license or registration required?+
Rules vary by state and locality. A 750 W motor with a 30-50 km/h top speed may exceed 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 3-10 hours from fully empty with the supplied charger. Partial top-ups take proportionally less time.
Can I pedal it if the battery runs out?+
Yes. The 7-Speed drivetrain works independently of the motor. The bike is heavy at about 93 lb, so pedaling home unassisted is slow but possible on flat ground.
Will the brakes handle the speed?+
Mechanical disc brakes front and rear give reliable stopping power. Bed the pads in with 10-15 progressive stops during the first few rides.
Is the battery removable for indoor charging?+
Yes. It unlocks with the supplied key and lifts out, or charges in place through the frame-side port.
What is the load capacity?+
The product listing rates the load capacity at 46 kg (101 lb) for rider plus cargo. Confirm the figure suits your use before loading gear, and keep within the stated limit.
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 Battery624 Wh PackDisc BrakesFront SuspensionFat Tires
Why Choose the HKM-5613267
Front Fork for Rough Paths
A suspension fork up front absorbs roots and rocks so the front wheel keeps tracking instead of chattering.
Fat Tires for Grip
20 x 4 in tires float over sand and grip gravel and wet pavement where a narrow tire would skate.
Twist or Pedal
Throttle for immediate acceleration, pedals to extend range; most owners mix both on a ride.
Quiet Rear Hub Drive
The motor lives in the rear hub with no extra chain to service, so the ride stays quiet and simple.
City-to-Trail Versatility
A steel frame and wide tires make the bike at home on city streets and light off-road loops alike.
Built for Daily Use
Sealed connectors, a covered battery compartment, and disc brakes that resist weather suit a bike ridden every day.
Controls & Indicators
Power Button
On the battery pack; hold to switch the system on and off.
Mode Buttons
On the display; cycle pedal-assist levels and lighting.
Twist Throttle
Right-hand grip; proportional response, works with or without pedaling.
Speedometer
Live speed readout in mph, switchable to km/h in settings.
Battery Gauge
Segment and percentage readout on the LCD.
Light Switch
Toggles the LED headlight.
Shifter
Right-hand index shifter for the 7-Speed Shimano derailleur.
Pre-Ride Safety Checklist
- Check tire pressure and set it for the terrain you plan to ride.
- Squeeze both brake levers; they should firm up well before the grip.
- Confirm the battery is seated and locked, and the display shows charge.
- Spin both wheels and check nothing rubs the brakes or frame.
- Verify the axle nuts and stem bolts are tight.
- Test the throttle at walking pace in a clear area before riding in traffic.
- Switch on the headlight if riding near dusk; wear a helmet rated for the speeds.
- Confirm cargo is within the 46 kg (101 lb) load rating before loading the rear rack.
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. 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. If range is down year-round after many cycles, the pack may be nearing the end of its service life.
The brakes feel weak at the lever.+
Mechanical disc brakes may need pad adjustment or the cables re-tensioned. Inspect pad thickness and adjust the calipers 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 a quarter turn at a time; replace if needed.
The front fork rattles over bumps.+
Check that the axle is fully seated and the clamp is tight. If the rattle persists, the fork may need service.
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 it and contact support.
Certifications & Standards
The product 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.
- 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 30-50 km/h. 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 these speeds a bicycle helmet is the minimum; many riders choose a certified mountain or downhill helmet.
- Do not exceed the 46 kg (101 lb) load capacity stated in the product listing, which includes the rider and cargo.
- Check local law before riding on public roads or paths. A 750 W motor with a 30-50 km/h 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.
- 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, on a non-flammable surface.
- 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-5613267 · 750 W brushless rear hub motor (60-70 Nm) · 48 V 13 Ah lithium (624 Wh) · up to 31 mph top speed · up to 37 mi (60 km) range · 20 x 4 in fat tires · 101 lb (46 kg) load capacity per product listing · steel frame · front suspension fork · disc brakes · 7-Speed. 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.
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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.
