Electric Bicycles >>
HKM-9883859 32 mph 1200 W Electric Fat Tire Bike, 48 V 20 Ah 960 Wh Battery, 7-Speed Shimano, Kenda 20 x 4.0 in Tires
HKM-9883859
1200 W 32 mph Electric Fat Tire Bike
The HKM-9883859 is an electric fat tire bike built around a 6061 aluminum alloy frame. The rear hub motor deliver 85 N.m at the wheel, which is what moves the bike away from a stop and keeps it climbing when the road tilts up - the rated grade is roughly 30 degrees with a solo rider.
Key Features
8 details that make the HKM-9883859 a dependable ride.
1200 W Bafang Brushless Rear Hub Motor
A 1200 W Bafang brushless motor is laced straight into the rear wheel hub, with 1500 W available in short bursts. Drive losses stay low because nothing sits between the motor and the ground, and routine care is limited to checking axle-nut torque. Peak output handles roughly a 30 degree grade with a solo rider.
1500 W Peak for Passing and Launches
Nominal output tells you what the motor will hold all day; peak output tells you what it can do for the ten seconds that matter. 1500 W on tap covers pulling away from a light ahead of traffic, cresting a short ramp without downshifting, and holding 24 mph into a headwind.
48 V 20 Ah Samsung Lithium Pack (960 Wh)
Samsung cells are used for their energy density and cycle life. The pack locks into the frame, lifts out with a key for indoor charging, and refills in 6-7 hours from empty. 960 Wh is enough for a full week of short commutes between charges.
85 n.m of Wheel Torque
Torque, not watts, is what a hill actually asks for. At 85 N.m the drivetrain pulls a solo rider up a grade of about 30 degrees without stalling or cooking the controller. Heavier riders and loaded cargo cut into that figure, and dropping a gear on the 7-Speed Shimano derailleur restores most of it.
Tektro Hydraulic Disc Brakes
Sealed hydraulic lines actuate both calipers, so lever effort stays light and predictable when the rotors heat up on a long descent and there is no cable to stretch or corrode. Power-off levers cut motor drive the instant either lever moves.
7-Speed Shimano Drivetrain
A 7-Speed Shimano derailleur gives usable cadence from walking pace up to cruising speed. The spread of ratios is what lets a heavier rider climb the rated grade under pedal power instead of leaning on the motor and draining the pack.
Kenda 20 x 4.0 in Tires
Kenda casings in 20 x 4.0 in spread rider and cargo weight over a large footprint. Run 15-20 psi on pavement for lower rolling resistance, or drop to 10-12 psi so the tire can flatten out and grip gravel, dirt, sand and packed snow. The wide profile also damps small vibration the suspension never sees.
Lockable Front Suspension Fork
A hydraulic fork with mechanical lockout smooths broken pavement and gravel when open, and firms up for efficient pedalling on smooth roads when locked. Most riders on mixed surfaces simply leave it open.
Overview
Built for the ride ahead.
The HKM-9883859 is an electric fat tire bike built around a 6061 aluminum alloy frame. The rear hub motor deliver 85 N.m at the wheel, which is what moves the bike away from a stop and keeps it climbing when the road tilts up - the rated grade is roughly 30 degrees with a solo rider. The 6061 aluminum alloy frame is rated for 330 lb of rider, passenger gear and cargo combined. Energy comes from a 48 V 20 Ah lithium pack built on Samsung cells, 960 Wh in total. It charges in 6-7 hours from empty on the supplied smart charger and can be topped up on or off the bike. Cells of this grade hold roughly 80 percent of their original capacity after about 800 full cycles with sensible charging habits. Range is a band rather than a number because it tracks how you ride. Throttle-only at higher speed lands near the bottom of the 45-70 mi window; moderate pedal-assist on mixed terrain sits in the middle; light assist with steady pedalling on level ground reaches the top.
Engineered Around the Details That Matter
The HKM-9883859 is engineered around the details that matter for everyday riding.
Every detail is chosen to make the ride smoother, safer, and more dependable, from the frame geometry to the final finish. The HKM-9883859 pairs a 1200 w bafang brushless rear hub motor (1500 w peak), 48 V 20 Ah Samsung lithium-ion (960 Wh), removable and lockable, a range of 45-70 mi (72-112 km), varies with terrain, rider weight and assist level, so it is built for real-world rides rather than showroom specs.
Full Specifications
Measurements are shown in US customary units first, with metric equivalents in parentheses.
Battery, Range, and Charging
Up to 45-70 mi (72-112 km) per charge.
The 48 V 20 Ah pack stores 960 Wh on Samsung cells. For reference, a mainstream commuter e-bike ships with 400-600 Wh, so this pack carries roughly half again as much. That headroom is what lets you ride throttle-heavy without watching the gauge. Four variables move real-world range more than anything else: how much you pedal, total load, tire pressure and terrain. Throttle-only at speed sits near 45 mi. Moderate pedal-assist on mixed ground returns roughly 57 mi. Light assist with steady pedalling on the flat reaches 70 mi. Temperatures below 40 F (4 C) temporarily trim 10-20 percent of usable capacity, which returns once the pack warms up.
Daily Use & Care
A short routine keeps the ride quiet and the range where it should be.
Set tire pressure for the surface: 15-20 psi on pavement for lower rolling resistance, 10-12 psi on gravel, sand or snow so the Kenda casing can flatten and grip.
Rinse the frame, rims and drivetrain with fresh water after riding on salted roads or wet gravel. Road film attacks alloy fasteners if it is left in place.
Check axle nuts and stem bolts before the first ride of each week. A 85 N.m hub drive works fasteners loose faster than a conventional bicycle does.
Wipe and re-lubricate the chain every 100-150 mi, or after any ride through standing water or heavy dust.
Inspect pad thickness monthly. Disc pads wear quietly until they are gone; replace them once the friction material is under 1 mm.
Charge indoors at room temperature and unplug once the charger indicates a full pack rather than leaving it connected for days.
Keep the display and charge-port covers closed when the bike is parked outdoors so moisture stays out of the connectors.
What’s in the Box
Everything needed to get riding, right out of the box.
1 x HKM-9883859 Electric Fat Tire Bike
1 x HKM-9883859 electric fat tire bike
1 x 48 V 20 Ah Removable Lithium Battery Pack (960 Wh)
1 x 48 V 20 Ah removable lithium battery pack (960 Wh)
1 x Smart Charger with 100-240 V Input
1 x Smart charger with 100-240 V input
2 x Battery Keys
2 x Battery keys
1 x Toolkit with Hex Wrenches and Pedal Spanner
1 x Toolkit with hex wrenches and pedal spanner
1 x Pair of Pedals
1 x Pair of pedals
1 x User Manual and Assembly Guide
1 x User manual and assembly guide
Why Choose the HKM-9883859
6 reasons it earns its place.
1500 W Where It Counts
Peak output of 1500 W and 85 N.m of torque turn a standing start into a confident launch and a 30 degree ramp into an ordinary piece of road. That headroom is what keeps the bike composed when it is loaded.
960 Wh of Usable Energy
A 48 V 20 Ah Samsung pack covers 45-70 mi per charge, so a typical commuter plugs in once or twice a week rather than every night. Charging takes 6-7 hours from empty and can be done with the pack in or out of the frame.
Suspension Tuned for Real Roads
Potholes, expansion joints, brick lanes and gravel shortcuts become rideable when the lockable front suspension fork absorbs what a rigid frame would send straight to your hands and back.
Braking Sized for 32 mph
Tektro hydraulic disc brakes, front and rear are the correct specification for a 74 lb bike travelling at 32 mph. Bed the pads in over the first few rides with 10-15 progressive stops and the lever feel stays consistent for the life of the pads.
Hub-drive Simplicity
The motor lives in the rear hub with no mid-drive gearbox, belt or second chain to service. Fewer moving parts in the drive path means less to maintain and a quieter ride at cruising speed.
Fit and Load Headroom
A recommended rider height of 5 ft 2 in to 6 ft 4 in (157-193 cm) and a 330 lb combined load rating mean the bike is not at its limit with a full-size adult, a loaded pannier and a week of groceries on board.
Every Component Chosen for Real-World Use
Every component of the HKM-9883859 is chosen for real-world use.
It is built to be ridden regularly, cleaned easily, and kept in top condition with routine care. The HKM-9883859 pairs a 1200 w bafang brushless rear hub motor (1500 w peak), 48 V 20 Ah Samsung lithium-ion (960 Wh), removable and lockable, a range of 45-70 mi (72-112 km), varies with terrain, rider weight and assist level, so it is built for real-world rides rather than showroom specs.
Controls & Indicators
What each control on the HKM-9883859 does.
Power Button
On the battery pack; hold to switch the system on and off
Mode Buttons
Up and down buttons cycle 5 pedal-assist levels plus zero assist
Twist Throttle
Right-hand grip; proportional response, independent of assist level
Speedometer
Live readout in mph, switchable to km/h in the settings menu
Battery Gauge
5-segment charge indicator plus percentage readout on the LCD
Light Switch
Long-press the up button to toggle the headlight and tail-light
Shifter
Right-hand index shifter for the 7-Speed Shimano derailleur
Frequently Asked Questions
Quick answers about the HKM-9883859.
How much assembly is required out of the box?
The bike arrives roughly 85 percent assembled. What is left is the front wheel, straightening and bolting the handlebar, pedals, saddle height and a brake alignment check. Budget 30-45 minutes with the supplied tools, or have a bike shop confirm torque and bed the pads if you would rather not.
What range should I actually plan for?
Plan on 45-70 mi. Throttle-only riding at higher speed lands near 45 mi; moderate pedal-assist on mixed ground returns around 57 mi; light assist on level pavement reaches 70 mi. Rider weight, headwind, hills and low tire pressure all pull the figure down.
How long does a full charge take?
About 6-7 hours from empty on the supplied charger. Partial top-ups take proportionally less; there is no need to run the pack down before plugging in, and no memory effect to manage.
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 port without removing anything.
Is a license or registration required?
Rules vary by state and locality. A 1200 W motor with a 32 mph top speed exceeds the limits of the common three-class e-bike framework in many US jurisdictions, which can place the bike in a moped or motor-driven cycle category. Check your state DMV and local ordinances before riding on public roads or bike paths.
Can I still pedal it if the battery runs flat?
Yes. The 7-Speed Shimano derailleur works independently of the motor. At roughly 74 lb the bike is heavy for unassisted pedalling, so it is slow going, but it is entirely rideable home on level ground.
Will the brakes cope with the speed and the load?
Tektro hydraulic disc brakes, front and rear are the appropriate specification for a 74 lb bike at 32 mph carrying up to 330 lb. Bed the pads in with 10-15 progressive stops from moderate speed over the first rides, and brake earlier than you would on an unloaded bike.
How steep a hill will it climb?
Roughly 30 degrees with a solo rider, using 85 N.m of wheel torque. Add a passenger or heavy cargo and that figure drops; dropping to a lower gear on the 7-Speed Shimano derailleur and pedalling through the climb recovers most of it.
Quick Troubleshooting
Common issues and what to check first.
The motor does not engage when I open the throttle.
Confirm the display is on and showing charge, the battery is locked home, and both brake levers are fully released - the cut-off sensors disable drive while a lever is pulled. 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 tire on pavement is the most common cause. Then consider temperature, since cold cuts available capacity temporarily. If range is down more than 30 percent year-round after many cycles, the pack is approaching the end of its service life.
The brakes feel spongy or the lever pulls too far.
On a hydraulic system that usually means air in the line or a fluid leak; stop riding and have it bled and inspected. On a cable system, take up the slack at the barrel adjuster and replace pads under 1 mm.
The chain skips under hard pedalling.
Indexing on the 7-Speed Shimano derailleur is likely out of adjustment, or the chain and cassette are worn. Turn the barrel adjuster a quarter turn at a time to line the indexing back up. If it only skips in the smallest cogs, replace the cassette and chain together.
The suspension rattles or feels harsh over bumps.
Check the fork lockout is in the position you expect and that the wheel is seated in the dropouts. If a rattle persists, inspect the stanchions for scoring and have a shop service the lowers or the rear shock bushings.
The display shows an error code and the bike will not move.
Switch the system off, wait 30 seconds and switch it back on. If the code returns, note the exact code and what you were doing when it appeared, then contact support - codes map to specific faults in the controller, motor or throttle circuit.
Certifications & Standards
Documented and tested for sale.
CE
European Conformity (CE) marking where applicable for the safety and electrical assembly.
ISO 9001
Quality management system held by the manufacturing facility.
Compliance Docs
Safety and compliance documentation included with every unit on request.
Tested
Each unit is inspected and function-tested before it leaves the warehouse.
Pre-Ride Safety Checklist
Run through these before every ride.
Set tire pressure for the terrain: 15-20 psi for pavement, 10-12 psi for gravel, sand or snow.
Squeeze both brake levers. They should firm up well before the grip, with no sponginess that would indicate air in the line or a stretched cable.
Confirm the battery is seated and locked and that the display shows the charge you expect.
Spin both wheels and check the rims run true with nothing rubbing the pads or the frame.
Check axle nuts and quick-releases 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; peak output is 1500 W and it arrives quickly.
Switch on the headlight and tail-light for dusk or night riding, and wear a helmet rated for 32 mph.
Confirm the lockable front suspension fork is set the way you want it before you set off - locked for smooth tarmac, open for broken surfaces.
Service & Policies
Every HKM-9883859 is backed by coverage designed to protect your investment.
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.
Important Safety Notes
Read before the first ride.
This 1200 W bike is rated at 32 mph. Read the manual first and practise throttle and braking in an open, traffic-free area. Leave extra room for braking, since stopping distance grows fast with speed and load. Wear a helmet every ride; a certified downhill or motorcycle helmet is wise at 32 mph. Do not exceed the 330 lb (150 kg) load limit, including rider, cargo, and rack load. Confirm local law before riding on public roads. Bed the brakes in with 10-15 progressive stops over the first rides. Never ride through water deep enough to reach the motor or battery. Charge only with the supplied charger, indoors and attended. Never open, puncture, or modify the pack. Slow down substantially on gravel, wet surfaces, and steep descents.
HKM-9883859 - W Electric Fat Tire Bike. Specifications are for reference; actual performance varies with rider, terrain, tire pressure, and temperature. 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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+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
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