High-Output Full-Suspension Electric Cross Bike
HKM-956755 Electric Cross Bike
The HKM-956755 is a cross-category machine: a 3000 W brushless geared hub motor and a 60 V 30 Ah lithium pack (1800 Wh) built into a hydroformed 6061 aluminum chassis on 20 x 4.0 in fat tires. It reaches 43.5 mph (70 km/h), covers 62-75 mi on a charge, and rides on a full-suspension platform with an 80 mm hydraulic fork and a preload-adjustable rear coil-over. Hydraulic disc brakes on 180 mm rotors, 7.1 in of ground clearance, and three selectable power maps let the same bike commute through traffic on Monday and climb a gravel fire road on Saturday.
3000 W (4000 W Peak) Motor60 V 30 Ah / 1800 Wh Pack43.5 mph Top Speed62-75 mi Range20 x 4.0 in Fat TiresFull Suspension, 80 mm Fork180 mm Hydraulic Discs330 lb Load Capacity
Motor
3000 W
4000 W peak brushless geared hub
Battery
60 V 30 Ah
1800 Wh removable 21700 cells
Top Speed
43.5 mph
70 km/h in Sport mode
Range
62-75 mi
100-120 km per charge
Tires
20 x 4.0 in
Fat tread, 7.1 in clearance
Load Capacity
330 lb
150 kg rider plus cargo
Overview
The HKM-956755 sits between a fast commuter and a light off-road machine, which is where the "cross bike" name comes from. The hydroformed 6061 aluminum frame keeps the complete bike at roughly 77 lb (35 kg) while carrying a 60 V drivetrain and a 30 Ah pack, and the 20 in wheel format keeps the mass low in the chassis. That combination is what makes a 43.5 mph bike feel planted rather than nervous when the surface changes from asphalt to hardpack.
Power comes from a 3000 W brushless geared hub motor that peaks at roughly 4000 W for short bursts. Rare-earth magnets and a precision-wound stator keep losses low, so acceleration stays linear rather than surging: 0-28 mph (0-45 km/h) takes about 4.8 seconds with a 165 lb rider. Three power maps - Eco, Normal, and Sport - change how much of that output the controller will release, which matters more than top speed when you are threading through a parking lot or handing the bike to a less experienced rider.
The 60 V 30 Ah pack holds 1800 Wh, built from automotive-grade 21700 cells with a battery management system watching cell voltage, temperature, charge, and discharge. Typical riding returns 62-75 mi (100-120 km). The pack unlocks and lifts out for indoor charging, and a full recharge from empty takes 6-8 hours. Cell life is rated at roughly 800 cycles before capacity settles to 80 percent of new.
Suspension and brakes are matched to the speed. The front fork offers 80 mm of hydraulic travel and the rear coil-over shock has adjustable preload, so you can firm up the back end for a passenger-free commute or soften it for washboard gravel. Both ends run 180 mm rotors with hydraulic actuation, and the front caliper is a dual-piston unit. Ground clearance measures 7.1 in (180 mm), enough to clear curbs, roots, and rutted trail without scraping the frame.
Key Features
3000 W Brushless Geared Hub Motor
The motor is laced into the rear wheel, so there is no secondary chain or gearbox between the drive and the ground. A 3000 W continuous rating with roughly 4000 W available in short bursts covers overtaking on a 40 mph road and pulling a 20 percent gravel incline from a standstill. The controller distributes torque progressively to limit wheel spin when the rear tire is on loose ground.
60 V 30 Ah Lithium Pack (1800 Wh)
Automotive-grade 21700 cells give the pack a high energy density for its physical size. 1800 Wh supports 62-75 mi (100-120 km) of mixed riding. The pack is lockable and lifts out of the frame with a key so it can be charged at a desk; a full charge from empty takes 6-8 hours, and the management system blocks overcharge, over-discharge, short circuit, and out-of-range temperatures.
Full Suspension: 80 mm Hydraulic Fork + Rear Coil-Over
The front fork provides 80 mm of hydraulic travel to absorb expansion joints, potholes, and trail chatter. At the rear, a coil-over shock with adjustable preload lets you dial spring rate to your weight and load. With 7.1 in (180 mm) of ground clearance the chassis stays clear of obstacles that would stop a conventional city frame.
Hydraulic Disc Brakes on 180 mm Rotors
Both ends run 180 mm rotors with sealed hydraulic actuation; the front caliper is a dual-piston design for extra bite. Lever effort stays light and consistent when the rotors heat up on a long descent, and the sealed lines shrug off mud and road film that would contaminate an open cable system. Brake levers cut motor power the moment either lever moves.
7-Speed Derailleur with Chain Guide
A 7-speed rear derailleur and one-finger thumb shifter keep the pedals useful across the whole speed range instead of spinning out above 15 mph. A chain guide holds the chain in place when the trail gets rough. Drop the assist level and use the gears if you want the workout; the motor and the drivetrain operate independently.
20 x 4.0 in Fat Tires with Reflective Sidewalls
The 20 x 4.0 in (50.8 x 10.2 cm) casings put a wide contact patch on the ground, which is what lets the bike float over sand, snow, mud, and rock instead of cutting into them. Aggressive tread blocks bite on loose climbs, and reflective sidewall strips make the wheels visible from the side at night.
LED Headlight, Brake Light, and Horn
An LED headlight and a rear brake-activated light run off the main pack, so there are no accessory batteries to manage. An electric horn on the left grip is loud enough to be heard over traffic, which matters on a bike that closes distance faster than drivers expect.
Commuter Hardware: Mudguards, Kickstand, Ergonomic Cockpit
Full-length mudguards keep spray off the rider and the drivetrain when the path turns sloppy. A wide elastomer-sprung saddle, lock-on grips, and an adjustable stem let you set an upright position that stays comfortable on a two-hour ride. A heavy-duty side stand holds the 77 lb bike on soft ground.
Full Specifications
Model
HKM-956755 | Electric Cross Bike
Frame Material
6061 aluminum alloy, hydroformed tubing
Motor
3000 W brushless geared rear hub, approximately 4000 W peak
System Voltage
60 V DC
Battery
60 V 30 Ah lithium-ion (1800 Wh), 21700 cells, removable and lockable
Charger
Smart charger, 100-240 V input
Charging Time
6-8 hours from empty
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity
Top Speed
43.5 mph (70 km/h)
Range Per Charge
62-75 mi (100-120 km), varies with terrain, rider weight, and assist level
Climbing Grade
Up to approximately 20 percent incline
Ride Modes
Eco, Normal, and Sport power maps plus 5 levels of pedal assist
Drivetrain
7-speed rear derailleur, thumb shifter, chain guide
Brakes
Hydraulic disc, 180 mm rotors front and rear, dual-piston front caliper
Suspension
Hydraulic fork with 80 mm travel + rear coil-over with adjustable preload
Tires
20 x 4.0 in (50.8 x 10.2 cm) fat tires, reflective sidewalls
Wheels
20 in (50.8 cm) alloy rims
Saddle
Wide saddle with elastomer suspension, lock-on ergonomic grips
Display
2.4 in backlit TFT LCD, IP65 rated: speed, battery, trip, odometer, mode
Throttle
Thumb throttle, works independently of the pedal-assist level
Lighting
LED headlight, brake-activated tail-light, electric horn, powered by main battery
Load Capacity
330 lb (150 kg) rider plus cargo
Bike Weight
Approximately 77 lb (35 kg) including battery
Ground Clearance
7.1 in (180 mm)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The 60 V 30 Ah pack stores 1800 Wh. Most fat-tire e-bikes ship with 600-1000 Wh, so this pack roughly doubles the usual energy budget - which is exactly what a 3000 W motor needs if the range figure is going to mean anything. The cells are 21700 format, chosen for energy density and cycle life, and the assembled pack is managed by a BMS that monitors voltage, current, and temperature at the cell group level.
Expect 62-75 mi (100-120 km) under typical mixed riding. Sustained Sport-mode running near 43.5 mph is the fastest way to shorten that figure; steady Normal-mode cruising with light pedal input is the fastest way to extend it. Rider weight, headwind, tire pressure, and ambient temperature all move the number. Below 40 F (4 C) the pack temporarily gives up 10-20 percent of its usable capacity and recovers once it warms.
Tip: Store the pack between 30 and 70 percent charge if the bike will sit for more than a month, and top it up every 4-6 weeks. Charging indoors at room temperature rather than in an unheated garage measurably extends usable pack life.
The pack unlocks with the supplied key and lifts clear of the frame in seconds, so you can carry 1800 Wh upstairs to charge while the bike stays locked outside. Charging in place works equally well - the port is reachable from the drive side behind a sealed rubber cover.
Daily Use & Care
- Set tire pressure for the surface: 18-25 psi on pavement for lower rolling resistance, 10-14 psi on sand, snow, or loose gravel so the casing can spread and grip.
- Rinse the frame, rims, and drivetrain with fresh water after riding salted roads or wet trail. Do not pressure-wash the hub, the battery bay, or the display.
- Re-torque the axle nuts, stem bolts, and rear shock hardware weekly. A 3000 W hub motor works fasteners loose faster than a conventional bicycle drivetrain.
- Clean and re-lubricate the chain every 100-150 mi, or immediately after any ride through standing water, mud, or heavy dust.
- Check brake pad thickness monthly and plan on bleeding the hydraulic system every 12-18 months to keep lever feel consistent.
- Charge indoors at room temperature and unplug once the charger indicator turns green rather than leaving it connected for days.
- Keep the charge port cover closed and the display seals seated when the bike is parked outside; the components are IP65 rated against splashes, not immersion.
What's in the Box
- 1 x HKM-956755 electric cross bike, approximately 85 percent pre-assembled
- 1 x 60 V 30 Ah 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 pedals
- 1 x Set of mudguards (front and rear)
- 1 x Illustrated user manual and assembly guide
Frequently Asked Questions
How much assembly is required out of the box?+
The bike arrives approximately 85 percent assembled. You install the front wheel, align and bolt the handlebar, fit the pedals and saddle, mount the mudguards, and check brake alignment. Budget 30-45 minutes with the supplied tools. If you are not comfortable torquing axle and stem hardware, have a shop finish the build.
What is the real top speed, and can it be limited?+
Under favorable conditions - a 165 lb (75 kg) rider, smooth pavement, full battery, Sport mode - the bike reaches 43.5 mph (70 km/h). Eco and Normal modes cap output well below that, which is the practical way to keep the bike manageable for a newer rider or to stretch range on a long day.
What range should I actually plan for?+
Plan for 62-75 mi (100-120 km) under mixed riding. Continuous high-speed running in Sport mode with no pedal input will land nearer the bottom of that band or below it. Moderate cruising with light pedal assist lands at the top. Cold weather, headwind, soft tires, and steep terrain all reduce it.
Is this legal to ride on public roads?+
Rules vary by state and locality. A 3000 W motor and a 43.5 mph top speed exceed the limits of the common three-class e-bike framework in most US jurisdictions, which may place this vehicle in a moped or motor-driven cycle category requiring a license, registration, and helmet. Check your state DMV and local ordinances before riding on public roads or bike paths.
Can I ride in the rain or through puddles?+
The motor, battery, controller, and display are IP65 rated, so rain and road spray are fine. Do not submerge the bike, ride through water deep enough to reach the hub, or pressure-wash it directly - high-pressure water drives past seals that handle rain without any trouble.
What maintenance do the hydraulic brakes need?+
Very little day to day. They self-adjust for pad wear, so the routine is checking pad thickness and rotor condition every month or so. Plan on a fluid bleed every 12-18 months, or sooner if the lever starts feeling soft or travels closer to the grip than it used to.
How long does the battery take to charge?+
About 6-8 hours from fully empty with the supplied charger. Partial top-ups take proportionally less; there is no benefit to running the pack down before recharging, and doing so regularly shortens cell life.
Can I pedal it if the battery runs out?+
Yes. The 7-speed derailleur drivetrain works with the motor off. The bike weighs about 77 lb (35 kg), so unassisted pedaling is slow and better treated as a way to get home rather than a riding mode.
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 Battery1800 Wh PackHydraulic BrakesFull SuspensionIP65 Rated
Why Choose the HKM-956755
One Bike, Three Personalities
Eco, Normal, and Sport are not marketing labels - they change how much of the 3000 W the controller will release and how sharply the throttle maps to it. Eco makes the bike behave like a calm commuter, Normal is the everyday setting, and Sport unlocks the full 43.5 mph. One machine covers three very different jobs.
Clearance and Travel for Real Trail
7.1 in (180 mm) of ground clearance, 80 mm of fork travel, and a preload-adjustable rear coil-over are what separate this from a city bike with knobby tires. Roots, ruts, drainage bars, and rock gardens pass under the frame instead of into it.
Thumb Throttle plus Torque-Sensing Assist
The thumb throttle gives instant electric drive with no pedalling at all. The 5-level torque-sensing pedal assist reads how hard you are pushing and scales the motor to match, which feels far more natural than a cadence sensor that simply switches on when the cranks turn.
Geared Hub, No Extra Drivetrain
Putting the motor in the rear hub removes the mid-drive gearbox, the secondary chain, and their maintenance. The geared reduction multiplies torque at low speed while staying notably quiet - most of what you hear at cruising speed is tire noise.
1800 Wh Means Charging Less Often
A 30 Ah pack at 60 V changes the ownership pattern. A 15 mi round trip commute is roughly a fifth of a charge, so most owners plug in once or twice a week rather than every night - and cells that spend less time at 100 percent last longer.
Sealed for Weather, Not Just Sunshine
IP65-rated electronics, sealed hydraulic brake lines, a covered charge port, and full mudguards mean rain is a scheduling detail rather than a reason to leave the bike at home.
Controls & Indicators
Power Button
On the battery pack; hold to switch the system on and off
Mode Buttons
Up and down buttons cycle the 5 pedal-assist levels; a separate press cycles Eco, Normal, and Sport
Thumb Throttle
Right-hand thumb lever; proportional response, independent of the assist level
Speedometer
Live speed on the 2.4 in TFT display, switchable between mph and km/h
Battery Gauge
Segmented charge bar plus percentage or voltage readout
Light Switch
Long-press the up button to toggle the LED headlight and brake light
Shifter
Right-hand thumb shifter for the 7-speed rear derailleur
Pre-Ride Safety Checklist
- Check tire pressure and set it for the surface: 18-25 psi for pavement, 10-14 psi for sand, snow, or loose gravel.
- Squeeze both brake levers. They should firm up well before the grip, with no sponginess that would suggest air in the hydraulic line.
- Confirm the battery is seated and locked and that the display shows the state of charge you expect.
- Spin both wheels and check that the rims run true and that nothing rubs the pads, the fork lowers, or the frame.
- Verify the axle nuts and the rear shock mounting hardware are tight, and rock the bike with the front brake on to check for headset play.
- Select Eco mode and test the throttle at walking pace in a clear area before entering traffic or committing to a trail.
- Switch on the headlight and tail-light for low light, and wear a helmet rated for the speeds this bike reaches - at 43.5 mph many riders choose a full-face or certified motorcycle helmet.
- Set the rear shock preload for your weight and any cargo before a loaded ride rather than adjusting it on the trail.
Quick Troubleshooting
The motor does not engage when I use the throttle.+
Confirm the display is on and showing charge, the battery is locked in place, and both brake levers are fully released - the cut-off sensors disable drive while a lever is pulled. Check that the bike is not sitting in a walk-assist or zero-assist state. If the display shows an error code, note it and contact support.
Range has dropped noticeably compared with when it was new.+
Check tire pressure first; a soft fat tire on pavement is the most common cause and costs more range than riders expect. Then consider temperature and how much time you have been spending in Sport mode. If range is down more than 30 percent year-round after many cycles, the pack is approaching the end of its service life.
The brake lever feels soft or pulls closer to the grip than it used to.+
Sponginess in a hydraulic system means air in the line, a fluid leak, or badly worn pads. Stop riding and have the system inspected and bled. Do not continue riding a 43.5 mph machine on compromised brakes.
The chain drops off the chainring on rough ground.+
Check that the chain guide is aligned and secured; it is there precisely for this. A stretched chain or a worn chainring will also drop under load - measure chain wear and replace the chain and cassette together when it exceeds 0.75 percent elongation.
The rear end feels harsh or bottoms out over bumps.+
The rear coil-over preload is likely set wrong for your weight. Increase preload if the shock bottoms out, back it off if the ride feels harsh and the shock is barely using its travel. Make one adjustment at a time and ride the same section of road to compare.
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, write down the exact code and what you were doing when it appeared, then contact support - codes map to specific faults in the controller, motor, throttle, or battery circuits.
Certifications & Standards
The HKM-956755 is produced in a facility operating under an ISO 9001 quality management system. The 21700 cells and the assembled 60 V 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 vehicle capable of 43.5 mph (70 km/h). Read the manual fully before the first ride, start in Eco mode, and practise throttle and brake control in an open, traffic-free area until the response is predictable. Braking distance at 43.5 mph is several times what it is at 20 mph.
- Wear a helmet on every ride. At 43.5 mph a standard bicycle helmet is the minimum; many riders choose a full-face or certified motorcycle helmet, plus gloves and eye protection.
- Do not exceed the 330 lb (150 kg) load capacity, which includes the rider and all cargo.
- Check local law before riding on public roads or paths. A 3000 W motor and 43.5 mph top speed place this vehicle outside standard e-bike classifications in most US jurisdictions.
- Bed in the brake pads with 10-15 progressive stops from moderate speed during the first rides before using the full speed range.
- The electronics are IP65 rated for rain and splashes. Do not submerge the bike, ride through water deep enough to reach the hub, or pressure-wash it.
- Charge only with the supplied charger, indoors, at room temperature, on a non-flammable surface, and do not leave a charging pack unattended overnight.
- Do not open, puncture, or modify the battery pack. Damaged lithium cells can vent and ignite.
- Reduce speed substantially on gravel, wet pavement, and downhill grades. Fat tires add grip but do not remove the risk of losing traction at speed.
HKM-956755 · 3000 W brushless geared rear hub (approximately 4000 W peak) · 60 V 30 Ah lithium (1800 Wh, 21700 cells) · 43.5 mph (70 km/h) top speed · 62-75 mi (100-120 km) range · 20 x 4.0 in fat tires · 330 lb (150 kg) load capacity · 6061 hydroformed aluminum frame · 80 mm hydraulic fork with rear coil-over · 180 mm hydraulic disc brakes · 7.1 in ground clearance. Specifications are provided for reference; actual performance varies with rider weight, terrain, tire pressure, temperature, and riding style. Range figures are measured under moderate assist on level ground. 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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For minor repairs or part replacements that can be handled personally, we provide cost-price genuine parts during the warranty period. Each order is accompanied by clear, step-by-step video tutorials to guide you through the self-repair process seamlessly.
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For issues requiring expert attention, simply contact our support team. We will locate the nearest authorized service center based on your order and location details. You only need to bring your vehicle to the designated center. Once servicing is complete, we will notify you for pickup. All repairs are free during the warranty period; afterward, only cost-based fees apply.
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