26-Inch Aluminum Electric Road Bike
HKM-553875 Electric Road Bike
The HKM-553875 is a 26 in aluminum-frame electric road bike built for commuters and weekend riders who want a lighter, faster e-bike without the bulk of a mountain or fat-tire design. A 750 W brushless rear hub motor pairs with a 48 V 19.2 Ah downtube-style removable battery (~922 Wh) for plenty of range and 28 mph top speed. 7-Speed drivetrain, hydraulic disc brakes at both ends, and an LCD display round out a bike that handles weekday commutes and weekend rides with equal ease.
750 W Hub Motor48 V 19.2 Ah / 922 Wh Pack28 mph Top Speed7-Speed DrivetrainHydraulic Disc Brakes26 in Aluminum Frame
Motor
750 W
Brushless rear hub, geared
Battery
48 V 19.2 Ah
Removable integrated pack, ~922 Wh
Top Speed
28 mph
45 km/h on pedal assist
Range
35-65 mi
56-105 km per charge
Load
330 lb
150 kg rated payload
Tires
26 x 1.95 in
CST road tread, commuting
Overview
The HKM-553875 is built around a 26 in aluminum road frame - lighter and more nimble than a full mountain or fat-tire e-bike, but with the same electric assist that takes the sting out of headwinds and hills. The 750 W rear hub motor delivers enough power for 28 mph top speed, while the 48 V 19.2 Ah (~922 Wh) battery provides between 35 and 65 mi of range depending on assist level and terrain. 7-Speed Shimano gearing and twist throttle complete a versatile commuter package.
Unlike heavier off-road e-bikes, the HKM-553875 rolls on 26 in road-tread tires at ~28 psi, which makes for a more efficient, quieter ride on pavement. Hydraulic disc brakes front and rear provide confident stopping in wet or dry conditions, and the removable battery can be charged indoors without parking the whole bike next to an outlet. The center-mounted LCD display shows speed, battery level, assist mode, odometer, and trip distance at a glance, even in direct sunlight.
Pre-ride, confirm tire pressure is at least 50 PSI for paved use, the battery is locked into the frame, and the brakes bite firm. On the road, start in assist level 1 or 2 to feel out the bike before opening the throttle. After the ride, plug the charger in before the pack drops below 20 percent - lithium cells last longer when they are not stored empty.
Key Features
750 W Rear Hub Motor
A 750 W brushless geared rear-hub motor delivers strong acceleration and pulls the bike up to 28 mph on assist. Because the motor sits in the rear wheel, the drivetrain stays simple and the bike pedals normally with the motor off - useful on tight city streets where you want to choose your own pace.
Removable Integrated Battery
A 48 V 19.2 Ah (~922 Wh) lithium pack slides up out of the down tube for indoor charging. The integrated location keeps the frame silhouette clean, lowers the center of gravity, and protects the cells from rocks and water thrown up by the front wheel.
7-Speed Drivetrain
A 7-Speed Shimano derailleur gives a gear range wide enough to spin comfortably up a steep climb and still hit a comfortable cadence on the flats. The Shimano rear cassette is paired with a single chainring for low-maintenance daily riding.
Hydraulic Disc Brakes
Front and rear hydraulic disc brakes deliver strong, modulated stopping power in wet or dry conditions. The rotors run larger than mechanical discs and shed heat better on long descents.
Center-Mounted LCD Display
The backlit center display shows speed, battery level, assist mode, odometer, and trip distance at a glance. Buttons on the left grip let the rider change assist levels without taking a hand off the bar.
Integrated LED Lighting
A front headlight and rear brake light run off the main battery, so there is nothing extra to charge. The light is wired through the controller so it does not need its own switch.
Lightweight Aluminum Frame
A 6061 aluminum road frame keeps the bike light enough at about 48 lb to carry up a flight of stairs. The geometry puts the rider in a comfortable upright position that is efficient on the road but relaxed enough for daily commuting.
26 in Road Tread Tires
26 x 1.95 in CST road tires roll fast on pavement while absorbing small bumps from broken asphalt. The narrower profile also reduces rolling resistance so the bike goes farther on each charge of the battery.
Full Specifications
Model
HKM-553875
Frame Material
Aluminum Alloy 6061
Frame Type
Diamond Frame, 26 in Wheel
Bike Size
26 in Wheel, Fits 5'4"-6'2"
Motor
750 W Brushless Rear Hub, Geared
Battery Voltage
48 V
Battery Capacity
19.2 Ah (~922 Wh)
Battery Type
Removable Lithium-ion, Integrated
Charge Time
4-6 Hours
Battery Cycles
800+ Charge Cycles
Display
Backlit Center LCD
Pedal Assist
5 Levels, Cadence Sensing
Climbing Angle
Up to 25 Degrees
Assembly
90% Pre-Assembled
Wiring
Internal Routing
Front Brake
Hydraulic Disc, 160 mm Rotor
Rear Brake
Hydraulic Disc, 160 mm Rotor
Front Fork
Rigid Aluminum, 1-1/8 in Steerer
Headset
Threaded, Sealed Cartridge
Tires
26 x 1.95 in CST Road Tread
Spokes
Stainless Steel, 14 Gauge
Saddle
Sport, Pressure-Relief Channel
Throttle
Twist Throttle, Right Grip
Front Light
Integrated LED Headlight
Rear Light
Integrated LED Brake Light
Net Weight
~48 lb / 22 kg
Load Capacity
330 lb / 150 kg
Rider Height
5'4" - 6'2" / 163-188 cm
Battery & Range
A 48 V 19.2 Ah lithium-ion pack sits inside the down tube and is rated for about 922 Wh of usable energy. The pack slides up out of the frame for indoor charging - no need to bring the entire bike inside if the charger will not reach the garage. Samsung-style 21700 cells are paired with a battery management system that protects against overcharge, overdischarge, short circuit, and thermal runaway.
Real-world range depends on assist level, terrain, rider weight, and tire pressure. In assist level 1 on flat pavement, expect up to 65 mi per charge. In assist level 5 on hilly commutes with a heavy rider, expect closer to 35 mi. Charging from empty takes between 4 and 6 hours with the included 2 A charger.
Tip: Charge the pack before it drops below 20 percent. Lithium cells last longest when stored between 30 and 80 percent state of charge, especially in cold weather.
The integrated battery keeps the frame silhouette clean, lowers the bike's center of gravity for better handling, and protects the pack from rain and road grime.
An LED battery indicator on the side of the pack shows state of charge at a glance even when the pack is off the bike.
The keyed cradle lock prevents the pack from being removed or powered on without the key - useful when parking at a station rack or in a college quad.
Daily Use & Care
- Start the battery with the keyed switch on the cradle, then long-press the power button on the display for three seconds.
- Mount the bike with the saddle at hip height - the recommended saddle height leaves a slight bend in the knee at the bottom of the pedal stroke.
- Pedal off in assist level 1 to feel out the brakes and the bike's weight before opening the throttle or stepping up to a higher assist level.
- Lean the bike against a rack or use the kickstand when parking - the aluminum road frame is light enough at ~48 lb to carry up a short flight of stairs.
What's in the Box
- 1 x HKM-553875 electric road bike (battery installed)
- 1 x 48 V 2 A charger
- 1 x Tool kit (Allen keys, spoke wrench, pedal wrench)
- 1 x Owner's manual and quick-start guide
- 2 x Battery keys
- 1 x Reflector set (front white, rear red)
Frequently Asked Questions
Does the HKM-553875 require assembly?+
The bike arrives 90 percent pre-assembled. You will need to install the front wheel, attach the handlebar, mount the pedals, and adjust the seat post. The whole process takes 25 to 35 minutes with the included tool kit.
Is the battery waterproof?+
The pack is rated IPX4 - splash-proof from any direction, but not submersible. Riding in rain is fine. Pressure-washing the battery cavity or submerging the pack in water will void the warranty.
Can I ride the bike without the battery?+
Yes. The rear hub motor freewheels when unpowered, so the bike pedals like a normal road bicycle. Without assist the 48 lb weight is heavier than a non-electric road bike, so expect to work harder on climbs.
How fast can the bike go?+
On the highest assist level with full battery, the HKM-553875 reaches 28 mph (45 km/h) on flat ground. Throttle-only operation is limited to 20 mph per US Class 2 regulations.
What is the warranty?+
Two years on the frame, one year on the motor, battery, and controller. Wear items (tires, brake pads, chain) are not covered.
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.
Why Choose the HKM-553875
Lightweight Aluminum Frame
At ~48 lb the HKM-553875 is meaningfully lighter than full-suspension or fat-tire e-bikes, so it is easier to lift onto a rack or carry up a flight of stairs. Aluminum also does not rust, so the bike holds up to year-round commuting.
Big Pack, Real Range
At 922 Wh the integrated battery is larger than most competitors in this price tier. Real-world range tops 65 mi in low assist on flat ground - enough for a full week of commuting.
26 in Wheels, Not 20 in
Larger 26 in wheels roll over broken pavement and railroad tracks more smoothly than the 20 in wheels common on cheaper folding e-bikes. They also provide a more stable ride at commuter speeds.
Hydraulic Disc Brakes
Front and rear hydraulic disc brakes deliver confident stopping in wet or dry conditions - a meaningful upgrade over the rim brakes found on entry-level road e-bikes.
Controls & Indicators
LCD Display
Speed, battery level, assist mode, odometer, trip distance
Pedal Assist
5 levels - 1 for easy flats, 5 for steep climbs
Walk-Assist Mode
6 km/h push-assist for walking the bike up stairs or hills
Power Button
Long press to power on, short press for lights
Mode Switch
Toggle between pedal assist, throttle, and walk-assist modes
Adjustable
Saddle, stem, and brake lever reach all adjustable without tools
Pre-Ride Safety Checklist
- Check tire pressure with a gauge - both tires should be at least 50 PSI for paved use and 40 to 45 PSI for mixed surfaces.
- Squeeze each brake lever and confirm the rotor bites firm within half an inch of lever travel.
- Lift the battery by the handle and confirm it locks fully into the cradle - a partially seated pack will cut power mid-ride.
- Look at the display - the battery bar should show at least three of five segments before heading out.
- Walk the bike forward and back, listening for any rubbing from the brakes or loose fenders.
Quick Troubleshooting
Top speed feels lower than expected+
Cold weather and a low battery both reduce motor output. Check the battery level and confirm assist mode is set to 5. Verify tire pressure is at least 50 PSI - soft tires rob range and speed.
Battery will not charge+
Confirm the charger LED turns red when plugged into the battery. If the LED stays green, the battery is already full or the charger is faulty. If the LED is dark, check the wall outlet and the charger fuse.
Display will not power on+
Confirm the battery is locked into the frame and the power button is held for at least three seconds. Check the keyed switch on the battery cradle - the pack must be clicked fully home.
Brakes feel spongy+
Hydraulic disc brakes may need to be bled. This is a 15-minute job with a bleed kit (sold separately) - follow the service manual video before riding.
Range is shorter than advertised+
Cold weather reduces usable battery capacity by 15-30 percent. Hilly terrain and a heavy rider also pull more current. Check tire pressure and reduce assist level when range matters.
Certifications & Standards
The HKM-553875 is engineered to meet the major North American and European safety and electromagnetic standards for electric bicycles. The battery pack is certified for both air and ground transport under UN 38.3, so the bike can be shipped and flown without hazmat surcharges on most carriers.
- UL 2849 - Electrical Drive System Safety
- EN 15194 - European E-Bike Safety Standard
- UN 38.3 - Battery Transport Safety
- CE - European Conformity
- FCC - Electromagnetic Compatibility
- RoHS - Hazardous Substance Restriction
Important Safety Notes
Riding any e-bike carries real risk. The HKM-553875 is built to minimize that risk with redundant electrical protections, hydraulic braking, and integrated lighting, but the rider is ultimately responsible for safe operation.
Always wear a helmet, follow local traffic laws, and ride within your ability. The bike is capable of 28 mph - faster than many riders are used to - so practice braking and cornering at low speed before taking it on a busy road.
- Overcurrent Protection - Controller cuts power if motor draws more than rated current
- Overheat Protection - Motor and controller reduce power if temperature exceeds safe range
- Low-Voltage Cutoff - Battery management system protects pack from over-discharge
- Short-Circuit Protection - Fused circuit cuts power in the event of a wiring fault
- Brake Light Activation - Rear light brightens when either brake lever is pulled
- Keyed Battery Lock - Battery cannot be removed or powered on without the key
Nationwide Service Network & Support
With over 3,000 authorized service centers across the United States, we ensure comprehensive after-sales support for your vehicle, giving you complete peace of mind.
We understand that maintenance needs may arise. When you purchase from us, you gain access to our unparalleled service ecosystem designed for maximum convenience and reliability.
1. DIY Repair & Parts Replacement:
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.
2. Professional Servicing:
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.
Rest assured—wherever you are, our extensive partner network is ready to keep your ride running smoothly.
Lifetime Limited Powertrain Warranty & Wrap Program
For added long-term security, our Lifetime Limited Powertrain Warranty and Lifetime Wrap Program provide continued mechanical breakdown coverage for as long as you own your vehicle—with no term or mileage restrictions.
Every product on Hekomart.com is expertly curated from thousands, quality tested, and lifestyle approved. Elevate your everyday.
Express Delivery Priority - Where Speed Meets Satisfaction
At Hekomart.com, we understand the anticipation that comes with every online order. While most platforms rely on standard economy shipping, we prioritize your excitement by strategically selecting premium express carriers to accelerate deliveries. Our intelligent logistics system analyzes real-time data to optimize routes, partnering with globally-recognized couriers like DHL, FedEx, and UPS to ensure 30% faster doorstep arrivals* than industry averages.
Every package receives 24/7 tracking visibility and proactive delivery updates, transforming waiting time into confidence. For time-sensitive purchases, our "Expedited Service Guarantee" offers optional priority handling at no extra cost, because your satisfaction isn't just a goal – it's the core of our delivery DNA.
*Based on internal 2025 data comparing standard shipping durations across major platforms. Delivery times vary by destination and customs procedures.
Credit Card 180 Days Purchase Protection
The 180 Days Purchase Protection protects the buyer if an item purchased has not been shipped or if a shipped item is significantly not as described by the seller. The 180 Days Purchase Protection covers all purchases and payments made through our website. We accept Visa, Master Card, American Express, and Discover Card. If you don't receive the item that you ordered, or it shows up significantly different from its description, you may qualify for Purchase Protection, and we'll reimburse you for the full purchase price plus any original shipping costs, subject to terms and limitations. If you are charged for a transaction that you didn't make, let us know within 60 days, and we've got you covered.
30 Days Money-Back Guarantee
We are confident that our products are of great quality and even better value. However, if upon receiving and inspecting your item you decide that you want to return it, you will have 30 days as of the date of shipment arrival to return it for a refund minus the shipping cost. No restocking charges. Any additional fees associated with a purchase transaction will be deducted from the amount of the refund.
24-Month Extended Warranty Service
If you purchase products from our website, you have 24 months to request repairs or replacement if any products turns out to be faulty or are not as advertised. During the warranty period if any product is found to have a manufacturer defect, we will repair or replace the defective part(s). If a product cannot be repaired or replaced within a reasonable time, you can request a refund or price reduction. We are confident that our products are of great quality and even better value. However, if upon receiving and inspecting your item you decide that you want to return it, you will have 30 days as of the date of shipment arrival to return it for a refund minus the shipping cost.
