Dual-Motor City Bike
HKM-6732371 Dual-Motor Electric City Bike
The HKM-6732371 pairs a 2000 W brushless rear hub motor with a 48 V 20 Ah lithium pack (960 Wh) in a aluminum alloy frame built for daily riding. The 20 x 4.0 in tires roll over potholes and gravel paths, while front suspension fork and hydraulic disc brakes keep the bike composed and in control. A 6-Speed Shimano drivetrain and pedal-assist let you add human power to extend the range, and the removable pack charges indoors. Rated for 330 lb of rider and cargo, this is a practical choice for commuting, errands, and weekend riding.
2000 W (peak 2600 W) Motor48 V 20 Ah / 960 Wh Pack31 mph Top Speed20 x 4.0 in TiresHydraulic Disc BrakesFront Suspension Fork6-Speed Shimano330 lb Load Capacity
Motor
2000 W
2600 W peak brushless
Battery
48 V 20 Ah
960 Wh removable lithium
Top Speed
31 mph
Throttle-assisted top speed
Range
30-37 mi
Varies with assist and terrain
Tires
20 x 4.0 in
All-terrain tread
Load Capacity
330 lb
Rider plus cargo
Overview
The HKM-6732371 is built around a aluminum alloy rigid frame and a 2000 W brushless rear hub motor that delivers smooth, clutch-free acceleration up to 31 mph. The 48 V 20 Ah lithium pack stores 960 Wh of energy, enough for 30-37 miles of real-world riding depending on how much you pedal and the terrain you cover.
A Front Suspension Fork paired with hydraulic disc brakes keeps the ride composed on broken pavement, gravel, and park paths. The 20 x 4.0 in rolls over obstacles that would stop a narrower tire, while the 6-Speed Shimano drivetrain lets you add human power whenever you want to stretch the range.
Practical details make the bike useful beyond recreation. The pack lifts out with a key for indoor charging, the LED headlight runs off the main battery, and dual-motor all-wheel drive gives you immediate acceleration or measured pedal assist at the twist of the throttle. The bike is rated for a combined 330 lb load.
Comfort and serviceability were designed in from the start. Sealed hydraulic-free cable routing where used, a corrosion-resistant frame finish, and a straightforward drivetrain mean most owners handle routine care at home. The result is a dependable dual-motor city bike for commuting, errands, and weekend riding.
Key Features
2000 W Brushless Rear Hub Motor
A 2000 W brushless motor is laced directly 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. Peak output reaches 2600 W for short bursts on hills and starts from a standstill.
Aluminum alloy Built to Last
The aluminum alloy chassis is chosen for its strength-to-weight balance and resistance to corrosion. Welds are finished and inspected, and the geometry is tuned for stable handling at the 31 mph top speed this model is capable of.
Removable 960 Wh Battery Pack
The 48 V 20 Ah pack sits in the down tube behind a lockable cover and lifts out with a key for indoor charging. 960 Wh is enough for a full week of short commutes between charges. A full recharge from empty takes about 5-7 hours on the supplied charger.
Front Suspension Fork
A front suspension fork smooths out broken pavement and gravel when riding mixed surfaces, and firms up the ride for efficient pedaling on smooth roads. The setup is tuned for the 330 lb load rating and the varied terrain this bike is built to handle.
Hydraulic Disc Brakes, Front and Rear
Both calipers are actuated with predictable, light lever effort. Power-off brake levers cut motor drive the instant either lever is pulled, a meaningful safety feature on a 31 mph bike. Pads are adjustable and replaceable for long service life.
6-Speed Shimano Drivetrain
A 6-Speed drivetrain with a Shimano index shifter gives usable pedaling cadence from walking pace up to cruising speed. The wide gear range lets heavier riders climb grades without overheating the battery.
20 x 4.0 in All-Terrain Tires
Run at low pressure the wide casing spreads rider and cargo weight over a large contact patch. The same tires add grip and comfort on gravel, wet pavement, light snow, and park paths where a narrower tire would skate around on the loose surface.
Confident On Mixed Surfaces
With front suspension fork and 20 x 4.0 in all-terrain tires, this model handles pavement, hardpack, and light trail with composure. The 330 lb load rating and stable geometry make it a practical choice for daily transport as well as recreation.
Full Specifications
Model
HKM-6732371 | Dual-Motor Electric City Bike
Frame Material
Aluminum alloy, electric bike geometry
Motor
2000 W brushless rear hub motor, 2600 W peak
System Voltage
48 V DC
Battery
48 V 20 Ah lithium-ion (960 Wh), removable
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
31 mph
Range Per Charge
30-37 mi, varies with terrain, rider weight, and assist level
Climbing Grade
Up to approximately 30 degrees with a solo rider
Peak Torque
100 N.m
Drivetrain
6-Speed Shimano derailleur with index shifter
Brakes
Hydraulic Disc Brakes, front and rear
Suspension
Front Suspension Fork
Tires
20 x 4.0 in, knobby all-terrain tread
Wheels
20 in alloy rims, stainless spokes
Saddle
Comfort saddle with ergonomic padding
Display
Backlit LCD: speed, battery level, assist mode, trip distance
Throttle
Twist-grip throttle with pedal-assist levels
Lighting
LED headlight, integrated brake-activated tail-light, powered by main battery
Load Capacity
330 lb (rider plus cargo)
Bike Weight
Approximately 88 lb including battery
Recommended Rider Height
5 ft 5 in to 6 ft 5 in
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The 48 V 20 Ah pack stores 960 Wh of energy, a generous budget for daily riding. That headroom lets the bike handle a throttle-assisted commute at speed without range anxiety at the end of the work day.
Real-world range depends on four variables more than anything else: how much you pedal, rider and cargo weight, tire pressure, and terrain. Throttle-only riding at moderate speed lands in the lower part of the 30-37 mi band. Moderate pedal-assist regularly returns the upper part. Cold weather below 40 F 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.
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 through the frame-side charge port.
Daily Use & Care
- Tire pressure sets the character of the bike. Run 12-18 psi on pavement for lower rolling resistance; drop to 8-12 psi for gravel and dirt so the tire can flatten and grip.
- Rinse the frame, rims, and drivetrain with fresh water after riding on salted roads or wet gravel. Road film attacks 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. 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-6732371 Dual-Motor City Bike, approximately 85 percent pre-assembled
- 1 x 48 V 20 Ah 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 User manual and assembly guide
- 1 x Front LED light (pre-installed)
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 30-37 mi depending on how much you pedal. Throttle-only riding at higher speeds lands closer to the low end. Moderate pedal-assist on mixed terrain regularly returns the high end. Heavier riders, headwinds, hills, and low tire pressure all reduce range.
Is a license or registration required?+
Rules vary by state and locality. A 2000 W motor with 2600 W peak output and 31 mph top speed may exceed the limits of the common three-class e-bike framework in many US jurisdictions, which can 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.
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.
Will the brakes handle the speed and the load?+
The hydraulic disc brakes are the appropriate specification for a 31 mph bike of this weight. Bed the pads in during the first few rides with 10-15 progressive stops. With the 330 lb load rating, brake earlier than you would with a lighter setup.
Can I pedal it if the battery runs out?+
Yes. The 6-Speed Shimano drivetrain works independently of the motor. The bike is heavy at approximately 88 lb, so pedaling home unassisted is slow going, but it is entirely possible on flat ground.
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.
What kind of riding is this model built for?+
The dual-motor city bike is suited to commuting, errands, and weekend recreation on pavement, hardpack, and light trail. The 20 x 4.0 in and 330 lb load rating make it a practical daily-transport option as well as a recreational ride.
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.
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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 Tested960 Wh PackHydraulic Disc BrakesFront Suspension
Why Choose the HKM-6732371
Built for the Dual-Motor City Bike
A low, stable geometry, a wide saddle, and integrated lights turn this model into a practical transport tool rather than a recreational toy. You can run errands, commute to work, or explore trails on the same bike without swapping seats or adding accessories.
Front Suspension Fork for Real Roads
Potholes, expansion joints, brick-paved lanes, and gravel shortcuts all become rideable surfaces when the suspension absorbs what a rigid frame would transmit directly to the rider. The tuning is matched to the 330 lb load rating.
Throttle or Pedal, Your Choice
Twist the throttle for immediate acceleration, or shift through the 6-Speed Shimano cassette and pedal. Most owners mix both: throttle to get moving from a stop, pedals to extend the range, and motor for hills.
Long-Range 960 Wh Battery
The 48 V 20 Ah pack stores 960 Wh, enough for 30-37 miles of mixed riding. Remove it for indoor charging or top it up in place through the frame port. The capacity is sized for daily use, not just short loops.
Easy to Store and Move
The rigid frame and moderate weight keep the bike easy to park, roll into a closet, or load onto a rack.
Rated for 330 lb Load
The frame, wheels, and brakes are specified for a combined 330 lb of rider and cargo. That margin means confident handling with a backpack, groceries, or a loaded rear rack, not just a solo rider on smooth pavement.
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 pedal-assist level
Speedometer
Live speed readout in mph, switchable to km/h in the settings menu
Battery Gauge
Segment 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 6-Speed Shimano rear derailleur
Pre-Ride Safety Checklist
- Check tire pressure and set it for the terrain you plan to ride: 12-18 psi for pavement, 8-12 psi for gravel or dirt.
- Squeeze both brake levers. They should firm up well before reaching the grip, with no sponginess that would indicate a problem.
- 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 quick-release levers and axle nuts 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 passenger.
- 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, confirm the load is balanced and within the 330 lb rating before you ride.
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 on pavement is the most common cause. Then consider temperature. 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 weak or uneven.+
Check pad thickness and rotor alignment. Sponginess in a hydraulic system means air in the line or a fluid leak. Stop riding and have the system inspected. Do not continue 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. If the chain skips only in the smallest cogs, the cassette is worn.
The suspension feels harsh or noisy.+
Check air pressure (if equipped) and that the wheel is seated in the dropouts. If noise persists, the unit may need service. Inspect 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 for diagnosis.
Certifications & Standards
The HKM-6732371 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 31 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 a helmet on every ride. At 31 mph a bicycle helmet is the minimum; many riders choose a certified motorcycle or downhill helmet.
- Do not exceed the 330 lb load capacity, which includes the rider and cargo.
- Check local law before riding on public roads or paths. A 2000 W motor with 2600 W peak output and 31 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.
- 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 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-6732371 · 2000 W brushless rear hub motor (2600 W peak) · 48 V 20 Ah lithium (960 Wh) · 31 mph top speed · 30-37 mi range · 20 x 4.0 in tires · 330 lb (rider plus cargo) load capacity · Hydraulic Disc Brakes · Front Suspension Fork. 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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