Balance Bikes >>
HKM-2925779 16-Inch Electric Balance Bike for Young Riders with a 350W Rear Hub Motor, 36V Battery and Aluminium Alloy Frame
HKM-2925779
The FXB03-16: Built for 5 to 12
The HKM-2925779 is the FXB03-16, a 16-inch electric balance bike built to carry riders from five to twelve through the years that matter. A 350W rear hub motor drives two speeds, the disc brake system delivers reliable stops, and the aluminium alloy frame keeps the whole bike light without giving up strength. The 36V lithium battery - 2.5Ah or 5Ah - charges in 1 to 3 hours for 10 to 30 km of range, the adjustable alloy handlebar grows with the rider, and 16 x 2.125 in tires hold the line smooth and stable.
Key Features
Six details that define the FXB03-16.
Built for Ages 5-12
The FXB03-16 is sized for the long stretch of childhood between five and twelve, where confidence grows faster than everything else. The adjustable handlebar and 16-inch wheels keep the fit working season after season, so one bike covers the years instead of one summer.
350W Rear Hub Motor
The 350W motor lives in the rear hub and pulls smoothly from a standstill with no chain to oil or tension. Power arrives in a linear way that keeps early rides calm, and there is no external drive hardware to snag on small legs or trailside brush.
Two Speeds, Adult Held
Two speed settings give one bike two lives: a calm pace for the learning laps and a quicker setting for riders who have earned it. The switch stays under adult control, so the pace moves up when the skills do, not before.
36V Battery, Two Capacities
The 36V lithium pack comes in 2.5Ah or 5Ah to match the session, charges in 1 to 3 hours, and covers 10 to 30 km per charge. That is a full afternoon of neighbourhood laps from a single plug-in at the wall.
Disc Brakes, Real Stopping
The disc brake system gives reliable stopping power with a bite that modulates instead of grabbing. Young riders learn to feather a lever rather than fear it, the braking habit every later bike will thank them for keeping.
Alloy Frame, Custom Touch
The aluminium alloy frame balances durability against weight, and customizable logos give each bike a personal stamp. Riders take ownership faster of something that is unmistakably theirs.
Overview
A 16-inch two-speed balance bike with disc brakes and a 36V battery, sized for ages 5-12.
The HKM-2925779 is the FXB03-16, a 16-inch electric balance bike built for the years between five and twelve. A 350W rear hub motor drives two speeds, disc brakes deliver reliable stops, and the aluminium alloy frame keeps the bike light enough for the riders it is sized for. The 36V lithium battery in 2.5Ah or 5Ah charges in 1 to 3 hours for 10 to 30 km of riding, the adjustable alloy handlebar tracks the growth spurts, and 16 x 2.125 in tires smooth out the terrain underneath. It is a bike made to last the seasons, with a personal touch for the rider who calls it theirs.
One Bike, Five Years
Sized for the long stretch from 5 to 12.
The adjustable alloy handlebar and 16-inch wheels are chosen for the long stretch of childhood, not one summer. The fit tracks the rider through the growth spurts, and the bike stays right as the skills grow.
Full Specifications
Everything worth knowing, in one table.
Why the Handlebar Matters More Than You Think
Fit is the control that controls all the others.
Every control on a balance bike runs through the bars, which is why the FXB03-16 makes its handlebar adjustable rather than fixed. Bars set too high or too low turn smooth ground into a fight, and a rider wrestling the bike learns fear where they should be learning lines. Set right, the throttle hand and the brake hand both work at full strength, and the bike steers from the hips instead of the wrists. Around the bars runs a 350W rear hub with two speed settings, disc brakes at the lever, and a 36V pack that charges in 1 to 3 hours. The aluminium alloy frame carries it all through the ages-five-to-twelve years, and 16 x 2.125 in tires keep the contact patch steady under every setting.
What’s in the Box
What arrives in the box, ready to build.
1 x 16-Inch FXB03-16 Bike
Frame, fork and wheels come fitted from the box
1 x 36V Lithium Battery
Seated in the mount 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-2925779
Six reasons families pick the HKM-2925779.
One Bike for Years
The adjustable handlebar and 16-inch wheels fit riders from five to twelve, so the bike grows through the years instead of being outgrown. Hand-me-downs work when the fit adjusts.
A Pace for Every Lesson
Two speed settings mean the bike is never too slow to teach or too quick to trust. The low mode carries the learning, the higher mode carries the reward, and the adults hold the switch.
Brakes That Build Trust
The disc brake system modulates instead of grabbing, so riders learn to feather a lever rather than fear it. That trust carries into every faster bike they ride later on.
No Chain, No Fuss
The 350W brushless motor drives from the rear hub, so there is no chain to oil, tension or snag. The weekly walkaround covers tires, brakes and battery contacts and takes minutes.
Range for Real Sessions
The 36V pack covers 10 to 30 km per charge in 2.5Ah or 5Ah, so a forgotten charge rarely ruins an afternoon. Charging takes 1 to 3 hours at any wall socket.
Unmistakably Theirs
The aluminium alloy frame keeps the weight down, and customizable logos put a personal stamp on it. Riders care for what they own, and ownership starts with a name on the bike.
Frequently Asked Questions
Straight answers about the HKM-2925779.
What ages and heights does the HKM-2925779 fit?
The FXB03-16 is designed for riders aged five to twelve, with 16-inch wheels, a tire section of 16 x 2.125 in and an adjustable alloy handlebar that tracks growth. The honest check is both feet flat while seated with knees slightly bent and hands reaching the bars at comfortable extension. Because this is a powered bike with two speed settings, also confirm the rider can work the brake lever smoothly before any change of pace.
How do the two speed settings work?
Two speed settings pace the bike through the 350W rear hub, and the switch belongs to the adults. Start in the low setting on flat, open ground until the throttle and the brake lever are under smooth control, then move up on ground with clear sight lines. The step between settings is deliberately small, so it feels like progress rather than a shock, and the higher setting stays earned rather than assumed.
How far does it go and how fast does it charge?
A full charge covers 10 to 30 km depending on terrain, rider and mode. The 36V lithium pack comes in 2.5Ah or 5Ah capacity, unclips for charging, and refills in 1 to 3 hours at any wall socket. For the healthiest battery life, charge indoors at room temperature on a hard surface, unplug once the indicator shows full, and bring the pack inside on cold days before judging its charge.
What does the adjustable handlebar change?
More than comfort: every control on the bike runs through the bars. The adjustable alloy handlebar lets the fit track the rider from five to twelve, keeping the throttle hand and the brake hand at full strength as the rider grows. Set the bars level with or slightly below the saddle for new riders, and raise them as confidence and reach develop. It is the adjustment that keeps every other adjustment working.
What assembly and upkeep are involved?
Assembly covers the handlebar, saddle height and battery seating, with the supplied hex keys and the manual. Beyond that: tire pressure weekly, a brake squeeze test before rides and a wipe-down after dusty ones. The 350W brushless drive lives in the rear hub, so there is no chain to oil or tension all season. The whole routine fits a weekend morning.
Are the customizable logos included?
The frame is designed to take customizable logos, so each bike can carry a personal touch that makes it unmistakably its rider's. Check with support for the options available and how to apply them without damaging the alloy finish. A named bike is a cared-for bike, and that small claim of ownership often does more for maintenance habits than any manual.
Quick Troubleshooting
When the HKM-2925779 needs attention, start here.
The bike will not power on
Unclip the pack and seat it back until the latch clicks, because a pack just short of home makes no contact. Press the power button and watch for the indicator. If it stays dark, charge for twenty minutes and retry, check the mount contacts for grit, and confirm the wall socket with another device first. Cold packs read empty until warmed, so bring the bike indoors before judging a winter battery.
The range keeps shrinking
Compare riding style before blaming the pack, because hills and the higher setting use far more per kilometre than cruising. Check tire pressure, since soft tires cost range twice. Cold weather trims every lithium pack. If nothing has changed, run one full uninterrupted charge cycle and retest the same loop, and log the loop you retest on before replacing anything.
The brake lever feels soft
A soft lever usually means the cable has stretched or the pads have glazed, both of which are adjustments rather than failures. Check that the rotor is clean and true first, then follow the manual for cable tension. If the lever still reaches the bar with the cable set, note when the feel changed and contact support. Stay in the low setting until the firm bite returns.
The handlebar will not hold its height
Check the stem clamp bolts for torque first, because a stem that has slipped once will slip again until it is properly torqued. Clean the steerer and the clamp faces, re-tighten to the spec in the manual, and retest over a week of rides. If the bars still creep down with correct torque, note when it started and contact support before riding further.
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. Check the throttle connector for a half-seated plug and confirm the mode switch has not been nudged. If cutouts continue on flat ground in the low setting with a full, cool pack, note the mode in use and contact support. Log when it happens: climbs point to the pack, flat-ground cutouts point to the controller.
The charger light never turns green
Confirm the wall socket with another device, then reseat the charger plug at both ends. Check the pack mount contacts for grit and charge indoors at room temperature, because cold packs refuse a full cycle. If the indicator still never completes, stop forcing cycles and contact support with a note of how long charging has taken recently. Do not leave a stalled pack on the charger unattended overnight.
Service & Policies
Coverage that rides every street 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-2925779.
The HKM-2925779 is a powered 16-inch balance bike for riders aged five to twelve, so a certified helmet is mandatory before every ride, with closed shoes and snug laces completing the kit. Start in the low setting on flat ground until the rider has the brake lever and the throttle under smooth control, with an adult approving every change of pace. Confirm the battery is fully latched before each ride, squeeze the lever to feel the bite, and check the stem clamp and axle hardware for torque. Keep fingers, laces and loose clothing clear of the rear hub and rotor while powered, and let hot parts cool after long sessions. Charge the 36V pack indoors at room temperature on a hard surface, unplug once the indicator shows full, and never carry a passenger.
HKM-2925779 - 16-inch FXB03-16 electric balance bike with a 350W brushless rear hub motor, two speed settings, a disc brake system and a 36V lithium battery in 2.5Ah or 5Ah charging in 1 to 3 hours, sized for ages 5-12. 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
