Balance Bikes >>
HKM-3450067 20-Inch Electric Balance Bike for Kids 8-15 Years with 400W Brushless Motor, 36V Battery and Hydraulic Disc Brakes
HKM-3450067
A Digital Display and 400W of Honest Pull
The HKM-3450067 reads like a proper machine because it is one. A 400W brushless rear hub motor draws from a 36V lithium pack, a digital display shows the rider exactly what is happening, and hydraulic disc brakes stop both wheels with two fingers. The 20-inch wheels roll over grass, gravel and pavement without complaint, the aluminium frame stays light for its size, and the saddle adjusts through the years from eight to fifteen. Three speed options keep parents in charge of the ramp, and the hi-viz styling keeps the bike easy to spot.
Key Features
Six details that make the HKM-3450067 feel like a real machine.
A Digital Display
The bar-mounted display shows speed and battery at a glance, which turns every ride into something the rider can read and manage. It replaces guesswork with numbers, and it makes the battery conversation with parents a lot shorter.
A 400W Brushless Hub Motor
The rear hub carries a steady 400W, enough for slopes, grass and longer park loops without overwhelming a young rider. It pulls smoothly from a standstill and stays quiet, with no chain and no gears to teach.
Hydraulic Disc Brakes
Both wheels stop with hydraulic discs, giving a light lever and a consistent bite in every condition. The stop repeats identically through the whole session, which is what builds the braking judgement a faster rider needs.
A 36V Lithium Pack
The battery rides in the frame and releases for bench charging, holding its output flat until low. Long sessions stop being a calculation, because the display and the pack together keep the energy story visible.
A Frame for the Growth Years
The aluminium alloy frame keeps the weight sensible for a 20-inch bike, and the adjustable saddle covers riders from eight to fifteen. One purchase covers the years when most bikes get outgrown twice.
Three Speed Options
The mode switch sets how eagerly the motor answers, from a gentle roll for newer riders to the full 400W for open ground. Parents control the ramp, and the bike grows into its own power rather than starting with all of it.
Overview
A 20-inch 400W electric balance bike with a digital display and hydraulic brakes.
The HKM-3450067 is a 20-inch electric balance bike for riders aged eight to fifteen, built for the years when a child wants real feedback from a real machine. A 400W brushless rear hub motor draws from a 36V lithium battery, a digital display shows speed and charge at a glance, and hydraulic disc brakes deliver a consistent stop on both wheels. Three selectable speed options let a parent tune the throttle from calm to quick, the aluminium frame carries an adjustable saddle through the growth years, and the 20-inch wheels take grass, gravel and pavement in stride. It is the bike that makes the middle years of riding feel properly equipped rather than improvised.
Numbers Where the Rider Can See Them
Speed, battery, and nothing to guess.
The bar-mounted digital display turns every ride into readable information: how fast, how much is left, and when it is time to head home. Small feature, big change in how kids ride.
Full Specifications
The complete specification, in one table.
Reading the Ride
What the display changes about a session.
Most young riders have no idea how much battery is left until the bike tells them by stopping, and the HKM-3450067 fixes that. The digital display puts speed and charge in the rider’s eyeline, so the decision to head home becomes theirs instead of a walk of shame. The 400W motor responds the same way every time, the hydraulic discs back that consistency up with a stop that never surprises, and the three speed options keep the whole package inside the rider’s current ability. The 20-inch wheels and aluminium frame make the bike light enough to manage at eight and big enough to matter at fifteen, which is a narrow window to engineer for and one this build handles well.
What’s in the Box
What the box contains, ready to set up.
1 x 20-Inch Balance Bike
Frame, fork, wheels and motor factory-fitted
1 x 36V Lithium Battery
Pack seated in its frame mount
1 x Battery Charger
Mains charger matched to the pack
1 x Digital Display
Bar-mounted, paired at the factory
1 x Manual and Tools
Setup sheets plus the hex keys needed
1 x Warranty Card
Registration details for warranty coverage
Why Choose the HKM-3450067
Six reasons the HKM-3450067 earns its place.
The Display Changes Everything
Speed and battery become numbers the rider owns, not mysteries managed by parents. Kids plan rides around what they can see, and the battery arguments at home mostly disappear.
400W With a Ramp
The motor has genuine pull for slopes and long loops, and the three speed options decide how fast that arrives. A cautious eight-year-old and a confident fourteen-year-old share the same hardware.
Hydraulics, Not Cables
Both wheels stop with hydraulic discs that hold their bite in wet grass and cold mornings. The lever stays light, which suits smaller hands, and the stop stays consistent as speeds climb.
Built for the Long Middle
The eight-to-fifteen window is where bikes get outgrown fastest, and the adjustable saddle plus 20-inch wheels keep this one fitting through it. The aluminium frame stays light enough for the young end to handle.
No Chain, No Chore
The hub motor means no drivetrain to oil, align or replace. The weekly routine is a pressure check, a brake squeeze and a wipe-down, which is the right amount of maintenance for a family bike.
Hi-Viz by Design
The yellow-green paint is not just style: it keeps the bike visible to drivers and easy to find in a row at the trailhead. Four colourways share the same frame, so the choice stays with the rider.
Frequently Asked Questions
Straight answers about the HKM-3450067.
What ages and sizes does it fit?
The bike is designed for riders from eight to fifteen, with leg length as the practical measure: feet should reach the ground while seated. The adjustable saddle covers the full span, and the 20-inch wheels keep the bike stable through the growth spurts that retire smaller bikes quickly. Measure the rider’s inseam against the saddle range before ordering. Kids this age stretch fast, so a little headroom above the minimum pays off.
What does the digital display show?
The bar-mounted display shows current speed and remaining battery at a glance, so the rider can manage the session instead of guessing. It is readable in daylight and mounted where it does not interfere with the grips. For parents, it also settles the how-much-is-left conversation before it starts. It mounts clear of the grips, stays put over bumps and shakes off rain.
How do the three speed options change the bike?
The switch sets how eagerly the motor answers, not a single hard speed. The gentlest option rolls in slowly for newer riders, the middle suits regular sessions, and the top option delivers the full 400W for open ground. Move up only when steering and braking need no reminders. The display shows the active mode at a glance too.
Why hydraulic disc brakes at this size?
Because 400W deserves a stop that matches. Hydraulics give a lighter lever with a stronger, more consistent bite than cable systems, and they hold that bite in wet grass and cold mornings. The consistency is what makes the higher speed options comfortable for a young rider to actually use. The lever reach adjusts for smaller hands as well.
How long does the battery last per charge?
Run time depends on the speed option and terrain, with steady cruising stretching the 36V pack far further than repeated full-throttle runs. The pack holds its output flat until low, so the bike does not fade mid-session, and the display makes the level visible before it matters. A spare pack doubles the day for back-to-back sessions.
What assembly and upkeep are involved?
Assembly covers the handlebar, saddle height, battery seating and display pairing, with the supplied hex keys and a manual that uses the same part names as the bike. Upkeep is tire pressure, a brake squeeze test and a wipe-down, with a yearly hydraulic check at a shop for regular riders. Neither job needs a workshop, special tools or a weekend.
Quick Troubleshooting
When the HKM-3450067 needs attention, start here.
The bike will not power on
Release 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 the display. If it stays dark, charge for half an hour and retry, check the mount contacts for grit, and confirm the wall socket with another device first. A pack that charged fine yesterday usually needs seating, not a service visit or new parts.
The display stays blank
Check the display connector first, because a half-seated plug is the most common cause of a dead screen. Power-cycle the bike with the brake lever pulled, which resets most display faults. If the screen lights but shows wrong numbers, note the pattern and contact support rather than replacing parts at random. Check the connector seated fully after any drop or transport knock too.
A brake lever feels spongy
Hydraulic systems signal trouble through the lever, so a soft bite means air or low fluid. Check for leaks at the calliper and the lever body, and book a professional bleed if any fluid shows. Contaminated pads mimic the same feel, so inspect them before assuming the system has failed. Never ride the top speed option on a brake that has not proven its bite, at any lever feel.
Run time keeps getting shorter
Compare riding style first, because repeated full-throttle runs use far more per minute than steady cruising. Check both tire pressures, since soft tires cost range as rolling resistance rises. Cold weather trims every lithium pack. If nothing has changed, run one full uninterrupted charge cycle and retest. Keep a simple ride diary for a week, because patterns show up fast.
The motor cuts out on bumps
An intermittent cut on rough ground usually points at a connector rather than the motor. Check the battery seating first, then the motor and display connectors for half-seated plugs. If the cut continues with everything seated, note which bumps trigger it and contact support before the next fast session. Note whether the cut happens in every speed option or only the top one.
The bike pulls to one side
Match both tire pressures first, because an uneven tire steers the whole bike. Check the axle nuts and the fork alignment after any drop or transport knock, and spin both wheels to listen for brake rub. If the pull continues, have the alignment checked at a shop before returning to the top speed option. A disc that scrapes constantly may need centering, which is a short shop job, not a DIY one.
Service & Policies
Coverage that keeps working long after the bike box arrives.
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-3450067.
The HKM-3450067 is a powered bike for riders aged eight to fifteen, so an adult keeps sessions supervised until the rider has proven braking judgement in every speed option they use. A certified helmet goes on before the first throttle press, with closed shoes and a clear riding area matched to the rider’s experience. Begin in the gentlest option and let the hydraulic discs teach the stop before speed rises. Check that the battery is fully latched before each ride, keep fingers and loose clothing clear of the rear hub and both discs while the wheels turn, and never carry a passenger on the frame or the saddle. Charge the pack indoors at room temperature on a hard surface, and unplug once the display shows full.
HKM-3450067 - 20-inch electric balance bike for kids aged eight to fifteen, with a 400W brushless rear hub motor, a 36V lithium battery, a bar-mounted digital display, three selectable speed options, hydraulic disc brakes, a suspension front fork and an adjustable saddle on an aluminium alloy frame. 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.
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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.
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Comprehensive Coverage
Every part warranted for two full years.
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Claims assessed within 1 business day.
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Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
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