Balance Bikes >>
HKM-8856787 16 Inch Electric Balance Bike FXB03, 250W Brushless Hub 5.0Ah Battery 2 Speed Modes Disc Brake Aluminium Frame
HKM-8856787
The FXB03, Tuned for Long Rides
The HKM-8856787 is the FXB03 platform at its most complete: a 250W brushless hub motor, an integrated 5.0Ah lithium battery and two speed modes that run from a gentle 12 km/h training pace up to 30 km/h. Ride windows run 100-120 minutes between quick charges, the disc brake finishes every run with a firm, predictable bite, and the aluminium alloy frame keeps the whole bike at 12.0 kg with the battery fitted. The adjustable 54 cm seat and 16-inch wheels hold the geometry steady from the first laps onward.
Key Features
Six details that define the HKM-8856787.
250W Brushless Hub Motor
The drive lives in the hub, so power arrives directly at the wheel with quiet efficiency and no chain to oil or tension. It is smooth, responsive support sized for young riders learning what the throttle feels like.
Two Modes, One Bike
Low mode cruises at a friendly 12 km/h for training laps; high mode opens up to 30 km/h once balance and brake control are smooth. The two-speed gears let the pace grow with the rider instead of replacing the bike.
5.0Ah Integrated Battery
The lithium pack is built into the frame, good for 100-120 minutes of riding per charge depending on mode and terrain. Quick charging keeps the downtime short, and there is no separate pack to lose.
Adjustable 54 cm Seat
The seat moves with the rider, backed by an 82 cm wheelbase that keeps the handling stable and predictable. Set it once, reset it after a growth spurt, and the fit stays honest for years.
12.0 kg, Easy to Live With
With the battery fitted the whole bike weighs 12.0 kg, light enough for an adult to lift into a boot and for young riders to steer at walking pace. The aluminium alloy frame is where the savings live.
Disc Brake, Firm Bite
The disc brake system delivers reliable stopping power at every speed mode, in dry conditions or damp. It is a real brake with real feedback, which is exactly what early brake habits should be built on.
Overview
A 16-inch FXB03 balance bike with a 250W brushless hub, 5.0Ah battery and two speed modes.
The HKM-8856787 is the FXB03 done properly: a 250W brushless hub motor for quiet, direct power, an integrated 5.0Ah lithium battery for 100-120 minute ride windows, and two speed gears that pace the bike from a 12 km/h training cruise up to 30 km/h. The disc brake gives reliable, predictable stops at every mode, the aluminium alloy frame holds the weight to 12.0 kg with the battery fitted, and the adjustable 54 cm seat with an 82 cm wheelbase keeps young riders stable and comfortable. Quick charging turns snack breaks into ready-to-ride again, and the 16-inch wheels carry the whole package with stability and maneuverability.
Long Windows, Two Paces
Up to two hours of riding per charge.
The 5.0Ah integrated battery runs 100-120 minutes per charge, and the two speed gears decide how fast the rider spends it: 12 km/h for learning, 30 km/h for the confident. The hub motor stays quiet either way.
Full Specifications
Everything worth knowing, in one table.
Why Long Ride Windows Change the Day
The ride ends when the rider decides.
Most first electric bikes lose the plot at the battery: the fun stops twenty minutes in, right when the confidence arrives. The HKM-8856787 runs an integrated 5.0Ah pack for 100-120 minutes per charge, so the session ends on the family's schedule rather than the gauge's. Around that battery sits the rest of the FXB03 package: a 250W brushless hub motor paced through two speed gears from 12 km/h up to 30 km/h, a disc brake with reliable, predictable stopping power, and an aluminium alloy frame at 12.0 kg with battery. The adjustable 54 cm seat and 82 cm wheelbase keep the fit honest, and quick charging means the next window is never far away.
What’s in the Box
What arrives in the box, ready to build.
1 x 16-Inch FXB03 Balance Bike
Frame, fork and wheels come fitted from the box
1 x Integrated 5.0Ah Battery
Built into the frame and matched to the charger
1 x Mains Charger
Matched to the battery pack from the factory
1 x Seat and Post
Fitted, ready to set for the height of the rider
1 x Manual and Hex Keys
Setup sheets with the tools supplied in the pack
1 x Warranty Card
Registration details for the records at home
Why Choose the HKM-8856787
Six reasons families pick the HKM-8856787.
Ride Windows That Last
A 100-120 minute run time per charge covers the whole afternoon loop, not just the driveway warm-up. The integrated 5.0Ah pack means no separate battery to carry, seat or forget at home.
A Pace That Grows With Them
Two speed gears run from a 12 km/h training cruise up to 30 km/h. The low mode is where instincts form; the high mode is the reward for balance and brake control that have been earned.
Quiet, Direct Power
The 250W brushless hub motor puts power at the wheel with no chain noise and no chain maintenance. It responds smoothly, which suits riders still learning to read a throttle.
Light Enough to Manage
At 12.0 kg with the battery fitted, the bike lifts into a boot without drama and steers easily for young arms. The aluminium alloy frame carries the savings without giving up strength.
Stops That Build Trust
The disc brake delivers reliable stopping power at every mode, in dry or damp. Predictable brakes are how young riders learn that speed is something they control.
A Fit That Adjusts
The 54 cm adjustable seat and 82 cm wheelbase hold the rider comfortably planted as they grow. One bike covers the seasons instead of one, with eight colorways to pick from.
Frequently Asked Questions
Straight answers about the HKM-8856787.
What kind of rider is the HKM-8856787 sized for?
The FXB03 runs 16-inch wheels, an adjustable 54 cm seat and an 82 cm wheelbase, sized for young riders moving up to a full balance bike. The honest check is physical rather than age-based: both feet flat on the ground while seated, knees slightly bent, hands on the bars at comfortable extension. At 12.0 kg with the battery fitted, the bike also stays manageable for adults while those first habits form. Start everyone in the low mode until balance and throttle control are smooth.
How do the two speed modes work?
The two-speed gears set the ceiling: low mode cruises at around 12 km/h for training laps, and high mode opens up to 30 km/h for confident riders. Move up only on ground with clear sight lines, and only once the disc brake is under smooth control in the mode below. The pace should always match both the skill of the rider and the surface of the day.
How long does a charge last?
The integrated 5.0Ah lithium battery runs 100-120 minutes per charge, depending on the speed mode, terrain, rider weight and temperature. High mode uses the pack far faster than cruising in low. For the healthiest battery life, charge indoors at room temperature on a hard surface and unplug once the charge completes. In winter, bring the bike indoors for an hour before charging, because chilled cells read and behave low.
How does charging work?
The pack is built into the frame, so charging happens on the bike with the matched mains charger; the manufacturer rates a full charge at under one hour. Confirm the wall socket with another device if anything behaves oddly, keep the charge port clean and dry, and avoid leaving the bike on the charger for days at a time between rides.
Is it easy to carry and store?
At 12.0 kg with the battery fitted, the bike lifts into a boot and carries up porch steps without drama, and there is no removable pack to haul separately. The aluminium alloy frame resists corrosion for garage or porch storage, and the 16-inch wheels keep the footprint compact on a rack or against a wall.
What assembly and upkeep are involved?
Setup covers the handlebar, seat height and a battery charge check, with the supplied hex keys and the manual. Beyond that: tire pressure weekly, a disc brake check before rides and a wipe-down after dusty ones. The brushless drive lives in the hub, so there is no chain to oil or tension all season. The routine fits a weekend morning.
Quick Troubleshooting
When the HKM-8856787 needs attention, start here.
The bike will not power on
Confirm the battery has charge, then check the power button and indicator with the bike on flat ground. If the indicator stays dark, connect the charger for twenty minutes and retry, and inspect the charge port for grit or moisture. If the port and contacts look clean and the bike stays dead, note what happened before the failure and contact support rather than forcing repeated restarts.
The run time keeps shrinking
Compare riding style first, because high mode and hills use far more per minute than cruising in low. Check tire pressure, since soft tires cost range twice. Cold weather trims every lithium pack. If nothing has changed, run one full uninterrupted charge and retest the same loop on the same mode, and log the loop you retest on before replacing anything.
The brake feels weak
Start with the lever and cable: check for stretch, grit at the lever pivot and full free travel, then follow the manual for adjustment. Retest on flat ground at low speed before returning to the high mode. If the bite still feels weak with the cable set correctly, note when the feel changed and contact support, because stopping power is the one system never to ride on a maybe.
The charger light never turns green
Confirm the wall socket with another device, then reseat the charger plug at both the wall and the port. Charge indoors at room temperature, because cold packs refuse a full cycle, and check the port for grit or bent pins. If the indicator still never completes, stop forcing cycles and contact support with a note of recent charging times. Do not leave a stalled charge unattended overnight.
The motor cut out mid-ride
A pack running low or hot will step back before it dies, so start with a full charge and a cool-down. Confirm the speed mode has not been nudged and the power connections are seated. If cutouts continue on flat ground in low mode with a full, cool battery, note the mode in use and contact support. Climbs point to the pack; flat-ground cutouts point to the controller. Ride gently for the first minute after any cutout to confirm everything is normal again.
The bike will not reach 30 km/h
First confirm the gears are actually in the high mode, because the most common cause is the bike still in low. Next check tire pressure, since soft tires cap real speed long before the motor does. A low battery also steps the pace back to protect itself. If the bike still tops out short in high mode with fresh tires and a full charge, note the numbers and contact support.
Service & Policies
Coverage that rides every road with you.
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 these notes before the first ride on the HKM-8856787.
The HKM-8856787 is a 16-inch-wheel balance bike with a 30 km/h high mode, so a certified helmet is mandatory before every ride, with closed shoes completing the kit. Start in the low mode on flat, open ground until the rider has the brake and the throttle under smooth control, with an adult approving every change. Confirm the battery is charged and the power connections seated before each ride, test the disc brake for the bite, and check the axle and stem hardware for torque. Keep fingers, laces and loose clothing clear of the hub while powered, and let hot parts cool after sessions. Charge indoors at room temperature on a hard surface, unplug once full, and never carry a passenger.
HKM-8856787 - 16-inch FXB03 electric balance bike with a 250W brushless hub motor, two speed modes from 12 km/h up to 30 km/h, an integrated 5.0Ah lithium battery rated for 100-120 minutes per charge, a disc brake, an aluminium alloy frame at 12.0 kg with battery, an adjustable 54 cm seat and an 82 cm wheelbase. Read the manual before first use. Nothing here is safety certification advice.
Every product we offer includes a 180-day purchase protection plan at no additional cost. This coverage extends beyond a standard warranty, reflecting our confidence in product quality and our ongoing commitment to your satisfaction.
The protection plan is designed to provide practical help in real-world situations. Whether you encounter a manufacturing issue, a performance problem, or an unexpected accident, our team is ready to assist with clear, fair solutions.
What Is Covered
Manufacturing Defects
We replace items with material or workmanship flaws at no charge.
Performance Failures
Free repair or replacement if the product fails under normal use.
Accidental Damage
One-time courtesy replacement at a reduced price.
Zero Hidden Fees
All shipping costs for replacements and returns are covered.
How to File a Claim
How This Differs from the Warranty
The 180-day purchase protection includes accidental damage and performance failures that are typically not covered by a standard warranty. It provides an additional layer of support during the first six months after purchase, giving you greater confidence and peace of mind.
We want you to be completely satisfied with your purchase. If for any reason you are not fully happy, you may return your item within 30 days of delivery for a full refund. No lengthy forms, no unnecessary questions.
Our return policy is built on a simple principle: if the product is not right for you, we will make it right. We understand that online shopping involves trust, and we work hard to earn that trust with every order.
Return Eligibility
30-Day Window
Request a return within 30 days of delivery.
Original Condition
Unworn or unused, with tags and original packaging.
Proof of Purchase
A receipt or order number is required.
Fast Refund
Refund processed within 10 business days.
How to Start a Return
Returns & Exchanges Overview
Damages & Exchanges
Please inspect your order as soon as it arrives. If the item is defective, damaged, or incorrect, contact us immediately so we can evaluate the issue and make it right. For exchanges, the fastest option is to return the original item and place a new order for the replacement.
We believe in the quality of our products, and we want you to share that confidence. Every product is backed by a 24-month warranty covering all structural and functional components, including zippers, buckles, straps, and fabric integrity.
The warranty is designed to be simple and accessible. You only need your proof of purchase to begin a claim, and our team will assess the issue promptly. If a manufacturing issue arises, we will make it right.
What the Warranty Covers
Comprehensive Coverage
Every part warranted for two full years.
Free Repair or Replacement
Whichever is faster, at no cost to you.
Quick Turnaround
Claims assessed within 1 business day.
Transferable
Warranty follows the product, not the owner.
How to File a Warranty Claim
Every order ships free—no minimums, no hidden fees. We currently deliver across the United States and are actively working to expand to more countries. We partner with reliable U.S. courier services to ensure your order arrives safely and on time.
Our delivery process is designed for transparency. From the moment you place your order to the moment it reaches your door, you receive clear updates at every stage. We carefully inspect each product before dispatch, and we provide tracking information as soon as your order ships.
Our U.S. Shipping Partners
USPS
Official national carrier with nationwide coverage.
UPS
Fast and reliable ground and express shipping.
FedEx
Express delivery with real-time tracking.
DHL eCommerce
Efficient parcel delivery for e-commerce shipments.
Delivery Process
Delivery Time Summary
Cancellations & Taxes
You may cancel your order at any time before it ships. All product prices include applicable taxes, and there are no additional VAT or customs fees for orders delivered within the United States.
Whether you have a question, need help with an order, or just want some advice, our support team is available around the clock. We don't just respond to messages—we work with you to find real solutions that fit your needs.
Our support specialists are trained to handle a wide range of requests, from product recommendations to technical troubleshooting. No matter the question, you can expect a professional and friendly response.
How We Can Help
Product Guidance
Our experts help you choose the right product.
Order Assistance
Modify orders, track shipments, or speed up delivery.
Warranty & Returns
Start claims or returns quickly and easily.
Technical Troubleshooting
Step-by-step solutions for product issues.
Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
Support Hours
Available 24 hours a day, 7 days a week
