Compact 20 in Electric City Bike with 7-Speed Drivetrain
HKM-6301395 Electric City Bike
The HKM-6301395 pairs a 1200 W brushless rear hub motor with a 48 V 15 Ah lithium pack (720 Wh) in a lightweight aluminum frame built for everyday commuting. The 20 in wheels keep the bike compact and agile in traffic, while a 7-speed drivetrain lets you add pedal power to extend range. Hydraulic-friendly disc brakes, a comfortable upright position, and a color display round out a practical bike for short city trips and the last mile to the train.
1200 W Brushless Motor48 V 15 Ah / 720 Wh Pack31 mph Top Speed (50 km/h)12-25 mi Range20 in Tires7-Speed Drivetrain265 lb Load CapacityAluminum Frame
Motor
1200 W
Brushless rear hub
Battery
48 V 15 Ah
720 Wh removable lithium
Top Speed
31 mph
50 km/h, throttle only
Range
12-25 mi
20-40 km, varies with assist
Tires
20 in
Compact city tread
Load Capacity
265 lb
120 kg rider plus cargo
Overview
The HKM-6301395 is built around a lightweight aluminum frame sized for quick city riding. The 20 in wheel diameter lowers the bike and shortens the wheelbase, which makes it easy to thread through traffic and store in a small apartment or hallway. The frame is rated for a combined rider-and-cargo load of 265 lb, enough for a commuter plus a backpack or a loaded pannier.
Under the styling is a modern electric drivetrain: a 1200 W brushless rear hub motor fed by a 48 V 15 Ah lithium pack that stores roughly 720 Wh of energy. The twist throttle gives immediate, clutch-free acceleration from a stop, and a 7-speed derailleur plus pedal-assist levels let you add human power to stretch the range on longer trips.
Real-world range lands in the 12-25 mi band because the bike is built for short urban trips. Throttle-only on flat pavement at moderate speed returns the lower end, around 12-15 mi. Adding pedal-assist on the same terrain pushes that toward 20-25 mi. Hills, headwinds, and a heavy load all reduce those numbers; firm tires and warm weather push them up.
Comfort hardware matches the drivetrain. An upright riding position keeps the rider alert in traffic, and the 20 in wheels lower the center of gravity for stable handling at city speeds. Disc brakes at both ends give predictable stopping power, and a color display keeps speed and charge in view at a glance.
Key Features
1200 W Brushless Rear Hub Motor
A 1200 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. The motor pulls away confidently from a stop at an intersection and holds city speed on the flat.
48 V 15 Ah Lithium Pack (720 Wh)
The pack sits in the frame behind a lockable cover and lifts out with a key for indoor charging. A full recharge from empty takes about 5-6 hours on the supplied charger; partial top-ups take proportionally less. 720 Wh is sized for daily short commutes between charges.
Front Suspension Fork
A front suspension fork smooths out broken pavement, curb cuts, and sewer-plate seams on the city commute. It takes the edge off the regular hits that would otherwise reach the rider, keeping the bike comfortable over a typical mixed-surface route.
Disc Brakes, Front and Rear
Disc brakes at both ends give consistent, weather-resistant stopping power in city traffic. Power-off brake levers cut motor drive the instant either lever is pulled - a meaningful safety feature on a 31 mph bike. Pads are easy to inspect and replace.
7-Speed Drivetrain
A 7-speed derailleur with an index shifter gives usable pedaling cadence from a standstill up to cruising speed. The wide gear range is what lets you climb the grades this bike is rated for and extend range by pedaling on the flat.
20 in City Tires
The compact 20 in wheels keep the bike agile in traffic and easy to store. The city-tread casing adds grip on wet pavement and light gravel where a slick tire would skate around, while staying quick to accelerate from a stop.
LED Headlight and Integrated Tail Light
A bright LED headlight runs off the main pack so there are no separate batteries to keep charged. A tail light adds visibility from behind in traffic and at dusk, powered through the main switch.
Rear Cargo Rack
A rear rack is sized for a pannier, a backpack, or a small crate, so groceries and work gear ride on the bike instead of on your back. Combined cargo capacity on the rack is roughly 55 lb.
Full Specifications
Model
HKM-6301395 | Electric City Bike
Frame Material
Aluminum alloy, compact city geometry
Motor
1200 W brushless rear hub motor
System Voltage
48 V DC
Battery
48 V 15 Ah lithium-ion (720 Wh), removable and lockable
Charger
2 A smart charger, 100-240 V input
Charging Time
5-6 hours from empty
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity
Top Speed
31 mph (50 km/h)
Range Per Charge
12-25 mi (20-40 km), varies with terrain, rider weight, and assist level
Climbing Grade
Up to approximately 20 degrees with a solo rider
Peak Torque
50-60 N.m
Drivetrain
7-speed derailleur with index shifter
Brakes
Disc brakes, front and rear, with power-off levers
Suspension
Front suspension fork
Tires
20 in city tires
Wheels
20 in alloy rims, stainless spokes
Saddle
Comfort saddle with upright riding position
Display
Backlit LCD: speed, battery level, assist mode, trip distance, odometer
Throttle
Twist-grip throttle with pedal-assist levels and zero assist
Lighting
LED headlight and tail light, powered by main battery
Load Capacity
265 lb (120 kg) rider plus cargo
Bike Weight
Approximately 95 lb (43 kg) including battery
Recommended Rider Height
5 ft 1 in to 6 ft 2 in (155-188 cm)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The 48 V 15 Ah pack stores 720 Wh of energy. That is enough for a day of short city trips or a round-trip commute without a midday recharge. The pack is sized for practical urban use rather than long touring distance, which keeps the bike light and easy to carry upstairs.
Real-world range depends on how much you pedal, rider and cargo weight, tire pressure, and terrain. Throttle-only riding on flat pavement at moderate speed lands in the 12-15 mi band. Adding pedal-assist on the same terrain regularly returns 20-25 mi. Hills, headwinds, and a heavy load reduce range; firm tires and warm weather push it 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 space.
The pack unlocks with the supplied key and lifts out of the frame in a few seconds, so you can charge it at a desk while the bike stays locked. Two keys are included. Charging with the pack installed works equally well through the frame-side port.
Daily Use & Care
- Tire pressure sets the character of the bike. Run higher pressure on pavement for lower rolling resistance; drop a little for rough paths.
- Rinse the frame, rims, and drivetrain with fresh water after riding on wet or salted streets. Road film attacks aluminum fasteners over time.
- Check that both axle nuts and the stem bolts are torqued before the first ride of each week.
- 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. Disc 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-6301395 electric city bike, approximately 85 percent pre-assembled
- 1 x 48 V 15 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 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 12-25 mi depending on how much you pedal. Throttle-only riding at higher speeds lands closer to 12-15 mi. Adding pedal-assist on mixed terrain regularly returns 20-25 mi. Heavier riders, headwinds, and hills all reduce range.
Is a license or registration required?+
Rules vary by state and locality. A 1200 W motor with a 31 mph top speed may exceed the limits of 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 5-6 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 around 95 lb, so pedaling home unassisted is slow going, but it is entirely possible on flat ground.
Will the brakes handle the speed?+
Disc brakes front and rear are the appropriate specification for a 31 mph bike of this weight. Bed the pads in during the first few rides with progressive stops from moderate speed to build the friction layer on the rotors.
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.
How compact is the bike for storage?+
The 20 in wheels and compact frame make it easy to store in a hallway or small apartment. With the pedals folded and the bars turned, it takes up far less floor space than a 26 in bike.
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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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 Battery720 Wh PackDisc Brakes7-SpeedCompact Frame
Why Choose the HKM-6301395
City-First, Practical Commuter
The compact 20 in frame, upright position, and rear rack turn this bike into a daily city tool rather than a weekend toy. You can commute to work, carry groceries, and hop on transit without swapping accessories.
Comfort for Real Streets
Potholes, curb cuts, and brick-paved lanes all become rideable when the front fork absorbs what a rigid frame would transmit to the rider. The upright position keeps you alert in traffic.
Two Ways to Ride
Twist the throttle for immediate acceleration, or shift through the 7-speed cassette and pedal. Most owners mix both - throttle to get moving, pedals to extend range, and motor for hills.
Direct-Drive Simplicity
The motor lives in the rear hub with no mid-drive gearbox or extra chain to service. Fewer moving parts in the drive path means less to maintain and a notably quiet ride.
Compact and Easy to Store
The 20 in wheel size and short wheelbase make the bike easy to park in small spaces and carry up stairs. It fits where a full-size bike will not, which is why it suits apartment living.
Built for Daily Use
Sealed electrical connectors, a covered and lockable battery compartment, and disc brakes that resist weather 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 pedal-assist levels and zero assist
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
Multi-segment charge indicator plus percentage readout on the LCD
Light Switch
Toggle the LED headlight and tail light from the display
Shifter
Right-hand index shifter for the 7-speed rear derailleur
Pre-Ride Safety Checklist
- Check tire pressure and set it for the terrain you plan to ride: higher for pavement, a little lower for rough paths.
- 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 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.
- 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 it is secured before riding.
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 cycles, the pack may be near the end of its service life.
The brakes feel spongy at the lever.+
Sponginess usually means air in the line or a fluid issue on hydraulic setups, or a stretched cable on mechanical ones. Stop riding and have the system inspected. Do not continue on a 31 mph bike with 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 it skips only in the smallest cogs, the cassette is worn and should be replaced with the chain.
The front fork rattles over bumps.+
Check that the wheel is seated in the dropouts and the quick-release is fully closed. If the rattle persists, the fork may need service - inspect the stanchions for scoring and have a shop rebuild it 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, then contact support - error codes map to specific faults in the controller, motor, or throttle circuits.
Certifications & Standards
The HKM-6301395 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 multi-sport helmet at these speeds.
- Do not exceed the 265 lb (120 kg) load capacity, which includes the rider and cargo.
- Check local law before riding on public roads or paths. A 1200 W motor with a 31 mph top speed may place this vehicle outside standard e-bike classifications in your area.
- Bed in the brake pads with 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 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; tires add grip but do not eliminate the risk of losing traction.
HKM-6301395 · 1200 W brushless rear hub motor · 48 V 15 Ah lithium (720 Wh) · 31 mph (50 km/h) top speed · 12-25 mi (20-40 km) range · 20 in tires · 265 lb (120 kg) load capacity · aluminum frame · 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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