Long-Range 26 in Full-Suspension Electric Mountain Bike
HKM-8169171 Electric Mountain Bike
The number that defines the HKM-8169171 is 36.4 Ah. On a 48 V system that is roughly 1747 Wh of stored energy - around three times what a mainstream trail e-bike carries, and unusual at this level of the market. It feeds a 2400 W motor through a three-speed gear selector, on a steel frame carried by aluminum hydraulic suspension at both ends. The 26 in wheels are the traditional trail size, big enough to roll over roots and rocks but short enough to stay manoeuvrable, and dual hydraulic disc brakes handle the 31 mph the drivetrain will produce.
2400 W Motor48 V 36.4 Ah / 1747 Wh Pack31 mph Top Speed37+ mi Range26 in TiresDual Hydraulic Disc BrakesFront and Rear Suspension3-Speed Gear Selector
Motor
2400 W
48 V brushless drive
Battery
48 V 36.4 Ah
1747 Wh lithium pack
Top Speed
31 mph
30-50 km/h by gear setting
Range
37+ mi
60+ km per charge
Tires
26 in
All-terrain trail tread
Load Capacity
330 lb
150 kg rider plus cargo
Overview
Most electric mountain bikes are built around a pack of 500-700 Wh and ask the rider to manage the range carefully. The HKM-8169171 takes the opposite approach: a 48 V 36.4 Ah pack storing roughly 1747 Wh, which removes range management from the ride almost entirely for anything short of an all-day expedition. The manufacturer quotes over 60 km (37+ mi), and that figure is conservative for the capacity on board - ridden with restraint on mixed ground, most owners will comfortably exceed it.
Driving that pack is a 2400 W motor, enough for 30-50 km/h (19-31 mph) depending on the gear setting selected. The three-position selector is more useful off-road than a simple on-off throttle: a lower setting gives finer control and better traction on a loose climb, while the highest setting is there for fire road and open ground. Combined with the large pack, it means the bike can be ridden hard without the range collapsing.
The chassis is steel rather than aluminum. On a trail bike that is a defensible choice: steel damps vibration noticeably better, resists the dings and impacts that come with off-road use, and can be repaired if something does go wrong. It weighs more, but on a bike carrying a 1747 Wh pack and a 2400 W motor, frame weight is a smaller share of the total than it would be on a conventional bicycle.
Suspension is fitted at both ends, using aluminum hydraulic units front and rear. That matters more than it sounds: rear suspension keeps the driven wheel in contact with the ground over roots and rocks, which is what actually converts motor torque into forward movement on rough terrain. Dual hydraulic disc brakes provide the stopping, and an LCD display keeps speed, charge, and trip data in view.
Key Features
2400 W Brushless Motor
A 2400 W brushless motor delivers its torque from zero rpm with no clutch and no power band to find - roll the throttle and the wheel drives. That characteristic suits climbing far better than a combustion engine does, because tractive effort is highest exactly where you need it, at low speed on a steep, loose surface. Brushless construction leaves nothing in the motor to wear out.
48 V 36.4 Ah Lithium Pack (1747 Wh)
At 36.4 Ah this is an unusually large pack for a bike in this class - roughly triple the capacity of a mainstream trail e-bike. The practical effect is that you stop planning rides around the battery. A full charge from empty takes approximately 10-12 hours on the supplied charger, so most owners charge overnight and simply ride.
Aluminum Hydraulic Suspension, Front and Rear
Hydraulic suspension units at both ends keep both tires tracking the ground over roots, rocks, and broken surfaces. Rear suspension is the one that changes how the bike drives: keeping the powered wheel in contact with the surface is what turns 2400 W into forward motion rather than wheelspin. Aluminum bodies keep the unsprung weight down.
Dual Hydraulic Disc Brakes
Sealed hydraulic lines actuate both calipers. Lever effort stays low and consistent as the rotors heat on a long descent, and there are no cables to pack with trail dust or corrode after a wet ride. Discs also keep working when the rims are muddy, which is a requirement rather than a luxury on a trail bike.
Three-Speed Gear Selector
Three drive settings step the output between a restrained mode for technical, slow-speed work and full output for open ground. Riding in a lower setting on a loose climb gives finer throttle resolution and better traction; it also reduces current draw, which is the simplest way to extend an already long range.
26 in All-Terrain Tires
The 26 in wheel is the classic trail size for good reason: large enough to roll over roots, rock steps, and drainage bars that would stop a smaller wheel, but short enough to keep the bike quick to turn in tight singletrack. All-terrain tread gives grip on dirt and gravel without being unbearably slow on the road sections in between.
LED Headlight Powered by the Main Pack
Lighting draws from the 1747 Wh main battery, so there are no separate cells to keep charged before an early start or a ride that runs past dusk. With a pack this large, running the light for a full ride costs a negligible share of available range.
330 lb Load Rating
The chassis carries a combined rider-and-cargo rating of 150 kg (330 lb), which covers a larger rider in protective kit with a loaded pack, tools, and water for a full day. Steel construction is part of why that figure holds up under off-road impacts rather than just under static load.
Full Specifications
Model
HKM-8169171 | Electric Mountain Bike
Frame Material
Steel frame, mountain geometry
Motor
2400 W brushless electric motor
System Voltage
48 V DC
Battery
48 V 36.4 Ah lithium-ion (1747 Wh)
Charger
Smart charger, 100-240 V input
Charging Time
Approximately 10-12 hours from empty
Battery Cycle Life
Approximately 800 charge cycles to 80 percent capacity
Top Speed
19-31 mph (30-50 km/h) depending on gear setting
Range Per Charge
Over 37 mi (60+ km), varies with terrain, rider weight, and gear setting
Climbing Grade
Up to approximately 30 degrees with a solo rider
Drive Layout
Electric drive with three-position gear selection
Drive Selection
Three-speed gear selector
Brakes
Dual hydraulic disc brakes, front and rear
Suspension
Aluminum hydraulic front fork and rear suspension
Tires
26 in all-terrain tires
Wheels
26 in rims, stainless spokes
Saddle
Padded trail saddle on adjustable seatpost
Display
LCD: speed, battery level, gear setting, trip distance, odometer
Throttle
Twist-grip throttle, proportional response
Lighting
LED headlight powered by the main battery
Load Capacity
330 lb (150 kg) rider plus cargo
Bike Weight
Approximately 77 lb (35 kg) including battery
Recommended Rider Height
5 ft 2 in to 6 ft 3 in (157-191 cm)
Certifications
CE, RoHS; battery cells UN38.3 tested
Battery, Range, and Charging
The 48 V 36.4 Ah pack stores approximately 1747 Wh. To put that in context, a mainstream trail e-bike typically ships with 500-700 Wh. Carrying three times that capacity changes the ownership experience more than any other single specification on this bike: you stop planning routes around the charger, stop rationing assist on climbs, and stop carrying a spare pack on longer days.
The manufacturer quotes over 60 km (37+ mi) per charge, which is a deliberately conservative figure for the capacity on board and reflects hard use in the highest gear setting. Ridden in a lower setting on mixed ground, most owners will exceed it comfortably. Terrain is the dominant variable off-road - soft sand, deep mud, and sustained climbing all draw heavily. Cold weather below 40 F (4 C) temporarily reduces available capacity by 10-20 percent, which returns as the pack warms.
Tip: A pack this large takes approximately 10-12 hours to fill from empty, so treat overnight charging as the normal routine rather than an inconvenience. There is no need to run the pack down first - partial charges take proportionally less time and do not harm the cells.
Let the pack cool for 20-30 minutes after a hard climbing session before plugging in. Charging a hot lithium pack accelerates capacity loss faster than any other routine habit, and on a 1747 Wh pack that represents a meaningful share of the value of the bike.
Daily Use & Care
- Set tire pressure for the terrain. Higher pressure for hardpack and road transfers, lower for loose dirt and gravel where the casing needs to spread and grip.
- Rinse mud off the frame, rims, and rotors after wet rides, but never aim a pressure washer at the motor, suspension seals, or battery connectors.
- Touch up paint chips on the steel frame promptly, particularly around the dropouts and welds, so corrosion cannot start under the finish.
- Check spoke tension and axle torque weekly. Motor torque plus off-road impacts works fasteners loose faster than pedalling alone does.
- Wipe the fork stanchions and rear shock shaft clean after every dusty or muddy ride so grit is not dragged past the seals.
- Inspect brake pad thickness monthly and before any ride with long descents; replace when the friction material is under 1 mm.
- Charge indoors at room temperature and unplug once the indicator turns green rather than leaving the charger connected for days at a time.
What's in the Box
- 1 x HKM-8169171 electric mountain bike, approximately 85 percent pre-assembled
- 1 x 48 V 36.4 Ah 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 Portable tire pump
- 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. You fit the front wheel, align and bolt the handlebar, install the pedals and saddle, and check brake alignment and rotor clearance. Budget 30-45 minutes with the supplied tools, and have a bike shop verify torque values and bed the brakes if you are not comfortable doing it yourself.
Is 36.4 Ah really necessary?+
Necessary, no - transformative, yes. Roughly 1747 Wh is about three times what a mainstream trail e-bike carries. In practice it means you can use the highest gear setting freely, ride multiple days between charges, or plan a long loop without carrying a charger. It also means the pack is working at a lower percentage of its capability at any moment, which helps cell life.
What range should I plan for?+
The quoted figure is over 60 km (37+ mi) and reflects hard use. On mixed ground in a lower gear setting, most owners exceed it comfortably. Sustained full-output riding, deep mud, sand, and repeated steep climbing will bring you back toward the quoted number.
How long does the battery take to charge?+
Approximately 10-12 hours from fully empty with the supplied charger - a consequence of the pack size rather than a slow charger. Overnight charging is the normal routine. Partial top-ups take proportionally less time.
Why a steel frame on a mountain bike?+
Steel damps trail vibration noticeably better than aluminum, takes impacts and dings without cracking, and can be repaired if it is ever damaged. It weighs more, but on a bike already carrying a 1747 Wh pack and a 2400 W motor, the frame is a smaller share of total weight than it would be on a conventional bicycle.
Does the rear suspension actually make a difference?+
Yes, and more than on an unpowered bike. Rear suspension keeps the driven wheel in contact with the ground over roots and rocks, and traction is what converts motor torque into forward movement. A hardtail with the same motor spins its rear wheel where this bike keeps driving.
Is a license or registration required?+
Rules vary by state and locality. A 2400 W motor with a 31 mph top speed exceeds 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. Check your state DMV and local trail rules before riding on public roads or public trails.
Will the brakes cope with steep descents?+
Dual hydraulic discs are the appropriate specification for a bike of this speed and mass. Bed the pads in with 10-15 progressive stops during the first rides. On long descents, alternate between front and rear rather than dragging one brake so neither rotor accumulates heat.
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CERoHSUN38.3 Battery1747 Wh PackHydraulic BrakesFull Suspension26 in Wheels
Why Choose the HKM-8169171
Range That Removes the Planning
Roughly 1747 Wh is enough that the battery stops being part of the decision about where to ride. No route splitting, no carrying a charger, no rationing assist on the way out so you can get home. For most riders that is worth more than a few pounds of saved weight.
Suspension at Both Ends, Not Just the Front
Full suspension is what lets a powered bike put its torque down on rough ground. Keeping the rear tire loaded and tracking is the difference between climbing a root-crossed pitch and spinning to a halt halfway up it.
Three Settings, Three Kinds of Riding
The gear selector caps output to suit the moment: restrained for technical, slow-speed work where fine throttle control matters, full output for the fire road home. It is also the simplest way to trade speed for range on a long day.
Steel Damps What Suspension Misses
Suspension handles the big hits; frame material handles the constant high-frequency buzz from gravel and hardpack. Steel absorbs that vibration in a way thin-wall aluminum does not, which is why the bike stays comfortable over hours rather than minutes.
26 in Wheels for Real Trails
Large enough to roll over roots and rock steps, short enough to turn quickly in tight singletrack, and easy to find tires for anywhere in the world. The 26 in size remains the sensible default for a trail bike that will actually be ridden on trails.
Built to Be Ridden in Bad Weather
Sealed connectors, a covered battery mount, and hydraulic brake lines that cannot pick up grit are what decide whether a trail bike gets ridden through a wet season or spends it in the workshop waiting for cables and pads.
Controls & Indicators
Power Button
Located on the battery pack; hold to switch the system on and off
Mode Buttons
Display buttons step through the three gear settings
Twist Throttle
Right-hand grip; proportional response within the selected gear setting
Speedometer
Live speed readout in mph, switchable to km/h in the settings menu
Battery Gauge
Segmented charge indicator plus voltage readout on the LCD
Light Switch
Long-press the up button to toggle the LED headlight
Suspension Preload
Preload adjustment on the rear unit sets spring rate for rider weight and load
Pre-Ride Safety Checklist
- Set tire pressure for the terrain you plan to ride: higher for hardpack and road transfers, lower for loose dirt and gravel.
- Squeeze both brake levers. They should firm up well before reaching the grip, with no sponginess that would indicate 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 the rims run true, no spokes are loose, and nothing rubs the brake pads or the frame.
- Check axle hardware, stem bolts, and the seatpost clamp, and confirm the headset has no play when you rock the bike with the front brake applied.
- Wipe the fork stanchions and rear shock shaft and check for oil weeping past the seals.
- Select the lowest gear setting and test the throttle at walking pace in a clear area before riding technical terrain.
- Wear a helmet appropriate to the terrain and speed. Gloves and eye protection are sensible additions on trails.
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 - the cut-off sensors disable drive while a lever is pulled. Check the gear selector is not left in its lowest setting. If an error code appears, note it and contact support.
Range is lower than the capacity suggests.+
Check tire pressure and which gear setting you are using; full output draws heavily. Off-road terrain, rider weight, and cold weather all contribute. Given the pack size, a genuinely disappointing range is unusual - if it persists across settings and temperatures, contact support.
The brakes feel spongy at the lever.+
Sponginess in a hydraulic system usually means air in the line or a fluid leak. Stop riding and have the system bled and inspected rather than continuing on compromised brakes.
The rear suspension bottoms out or feels harsh.+
Adjust the preload on the rear unit to match your weight and the terrain - too little preload bottoms out, too much rides harshly and loses traction. If the unit is weeping oil past the seal, have it serviced rather than continuing to ride it.
The front fork clunks over bumps.+
Check the axle is fully seated and the fork hardware is torqued. If the noise persists, inspect the stanchions for scoring and have the fork serviced - off-road use pushes dirt past the seals faster than road use does, and worn seals lose damping oil.
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 - codes map to specific faults in the controller, motor, or throttle circuits.
Certifications & Standards
The HKM-8169171 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 2400 W electric mountain bike capable of 31 mph. Read the manual fully before the first ride, start in the lowest gear setting, and practise throttle and brake control in an open, traffic-free area until the response feels predictable - particularly if you are coming from an unpowered mountain bike.
- Wear a helmet on every ride. At 31 mph on rough ground, a certified trail or full-face helmet with eye protection and gloves is the sensible choice.
- Do not exceed the 330 lb (150 kg) load capacity, which includes the rider, riding kit, and any cargo.
- Check local law and trail rules before riding. A 2400 W motor with a 31 mph top speed falls outside standard e-bike classifications in most US jurisdictions and may be prohibited on shared-use paths.
- Bed in the brake pads with 10-15 progressive stops during the first rides before attempting any long descent.
- Do not ride through water deep enough to reach the motor or the battery mount, and do not pressure-wash the electrical components or the suspension seals.
- Charge only with the supplied charger, indoors, at room temperature, on a non-flammable surface, and never leave a charging pack unattended overnight.
- Do not attempt to open, puncture, or modify the battery pack. Damaged lithium cells can vent and ignite.
- Reduce speed substantially on loose gravel, wet roots, and steep descents. Full suspension improves traction but does not remove the risk of losing grip.
HKM-8169171 · 2400 W brushless motor · 48 V 36.4 Ah lithium (1747 Wh) · 31 mph top speed · 37+ mi range · 26 in all-terrain tires · 330 lb (150 kg) load capacity · steel frame · aluminum hydraulic front and rear suspension · dual hydraulic disc brakes · three-speed gear selector. Specifications are provided for reference; actual performance varies with rider weight, terrain, tire pressure, temperature, and riding style. Range figures are measured under moderate gear settings on mixed surfaces. This page describes the product only and is not legal advice regarding vehicle classification - confirm local regulations before riding on public roads or public trails.
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