Balance Bikes >>
HKM-2958547 20-Inch Electric Balance Bike for Kids 5-12 Years with 800W Brushless Motor, 36V Battery and Hydraulic Disc Brakes
HKM-2958547
800W of Go, Hydraulic Brakes of Whoa
The HKM-2958547 puts serious hardware under a balance-bike format. An 800W brushless spoke hub motor drives the rear wheel from a 36V 5.0Ah pack that drops out of the frame for charging, and hydraulic disc brakes on both wheels bring it all back with two fingers. Three speed modes let parents set the pace, the 20-inch fat tires hold their line on loose ground, and a brake-integrated cut-out switch kills power the moment the lever is pulled. It is the bike that makes older riders look twice.
Key Features
Six details that define how the HKM-2958547 is built.
An 800W Spoke Hub Motor
The brushless motor sits in a spoked rear hub, delivering honest torque for climbs and loose ground. It pulls cleanly from a standstill and keeps its composure at speed, with no chain and no gears between the wrist and the wheel.
A Tool-Style 36V 5.0Ah Pack
The battery borrows its format from power tools: a rugged case that drops from the frame mount and charges on the bench. It slots back until it latches, holds output flat through the session, and can be swapped in seconds when a spare is charged.
Hydraulic Discs Front and Rear
Two hydraulic discs give the bike stopping power that matches its motor. The lever is light, the bite arrives early, and the stop repeats identically on wet grass, gravel and pavement, which is exactly what an 800W bike needs.
A Brake Cut-Out Switch
Pulling the brake lever cuts power to the motor instantly, so a grab of the brakes is always the winning move. It is a small feature with a big effect on confidence, and it teaches riders that brakes outrank throttle.
Three Speed Modes
The mode switch sets how eagerly the motor answers, from a calm crawl for first rides to the full 800W for open ground. Parents keep control of the ramp, and the bike grows with the rider without new hardware.
A Rigid Fat-Tire Platform
The steel-stiff frame and 20-inch fat tires need no suspension to ride well: the tire volume does the softening. That keeps the bike light, honest and easy to maintain, with nothing extra to service at the end of a hard season.
Overview
An 800W 20-inch fat tire balance bike with hydraulic brakes front and rear.
The HKM-2958547 is a 20-inch electric balance bike for riders aged five to twelve, built on a rigid fat-tire platform and powered by an 800W brushless spoke hub motor. The 36V 5.0Ah lithium pack drops from the frame in power-tool fashion for bench charging, and three selectable speed modes let a parent tune the throttle from calm to full. Hydraulic disc brakes on both wheels deliver a strong, repeatable stop, backed by a brake-integrated cut-out that kills power the moment the lever moves. The 20-inch fat tires float over grass, gravel and sand, and the 65-inch-long frame keeps the whole package stable at speed. It is a serious machine for the rider who has outgrown toy-grade bikes.
Brakes That Outrank the Throttle
Hydraulic discs, both wheels, one lesson.
Pull the lever and the cut-out switch kills motor power instantly, while two hydraulic discs bring the bike down. The stop repeats identically every single time, and the lever stays light even with the full 800W behind it.
Full Specifications
The complete specification, in one table.
Why Rigid Works Here
Tire volume is the suspension.
The HKM-2958547 skips suspension forks and shocks, and the fat tires explain why. Run at the right pressure, a 20-inch fat tire swallows the small stuff that a suspension fork would spend its travel on, and it does so with no seals, no oil and no service interval. The rigid fork keeps the front end light in the rider’s hands, which matters at this age, and the stiff frame means every bit of the 800W arrives as forward motion. The hydraulic discs close the loop, giving the rider a stop they can trust at every speed mode. What looks like the simple option is actually the honest one, and it keeps the bike lighter, cheaper to maintain and easier to understand.
What’s in the Box
What the box contains, ready to ride.
1 x 20-Inch Fat Tire Bike
Frame, fork, wheels and motor factory-fitted
1 x 36V 5.0Ah Battery
Tool-style pack seated in the frame mount
1 x Battery Charger
Mains charger matched to the pack
1 x Saddle and Post
Fitted, ready to set for leg length
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-2958547
Six reasons the HKM-2958547 stands out.
Honest 800W
The spoke hub motor delivers real torque for hills and loose ground, not just a marketing number. It pulls smoothly at every mode, so the power is usable rather than intimidating, and it stays quiet through long sessions.
Two Hydraulic Discs
Front and rear hydraulics give a lighter lever and a stronger stop than any cable setup at this size. The bite repeats identically in every condition, which is what lets a young rider use the higher speed modes with composure.
The Cut-Out Advantage
The brake-integrated power cut turns every emergency grab into the correct answer. Motor off, brakes on, bike stopped. Riders learn the hierarchy fast, and parents stop worrying about throttle-stuck scenarios.
A Battery That Swaps
The tool-style pack releases in seconds and charges indoors, so long sessions become a swap rather than a wait. A second charged pack doubles the day, and the rugged case shrugs off the garage floor.
Simple Where It Counts
A rigid fork, a hub motor and one-speed-per-mode controls keep the bike understandable. There is nothing mysterious to service, nothing to lubricate and nothing to explain beyond throttle and brakes.
Certified Build
The platform carries CE, FCC, EMC, EN71 and MSDS certification, which is the paperwork behind the build quality. For a bike this fast, that list is not decoration; it is the difference between a toy and a machine.
Frequently Asked Questions
Straight answers about the HKM-2958547.
Is 800W too much for a young rider?
The three speed modes exist precisely to answer this. The lowest mode rolls in gently and suits a five-year-old on flat ground, while the full 800W remains available as the rider proves their braking and steering. The brake cut-out adds a second layer of safety, so the worst case at any mode is a clean, immediate stop. The bike grows into the power rather than starting with it, and both layers work at every speed.
How does the brake cut-out switch work?
The brake lever carries a sensor that kills motor power the moment the lever moves, before the pads even reach the disc. It is standard practice on full-size e-bikes and rare on kids’ machines. The result is simple: brakes always outrank the throttle, in every mode and every condition. There are no settings to manage, no pairing and no app.
How does the tool-style battery compare to a built-in one?
It charges faster because it charges on the bench, away from the bike, and it swaps in seconds when a second pack is charged. The rugged case tolerates drops and garage floors, and the drop-down mount keeps the mass low in the frame where the handling benefits. A spare pack turns a long afternoon into a longer one, since one pack charges while the other rides.
Why no suspension on an off-road bike?
Fat tires are the suspension. Run at lower pressure, the 20-inch tire volume absorbs the small and medium bumps that a short-travel fork would otherwise handle, with no seals to maintain and no oil to service. The rigid fork also keeps the front end light and direct, which suits young riders, and it removes fork oil from the family maintenance budget entirely. Less service, more riding.
What ages and sizes does it fit?
The bike suits riders from five to twelve. Leg length is the practical measure, so the rider should place both feet flat or near-flat while seated, and the adjustable saddle covers the growth through that window. At 65 inches long, the wheelbase keeps the bike stable for the whole age span. The saddle range maps directly onto those growth years, so measure the rider rather than the age.
What upkeep does the bike need?
The short list: tire pressure before fast sessions, a brake squeeze test, and a wipe-down rather than a hose. Hydraulics get a periodic inspection for leaks and pad wear, with a professional bleed around once a year in regular use. There is no chain, no fork oil and no valve gear anywhere on the bike, and a torque check closes the list.
Quick Troubleshooting
When the HKM-2958547 needs attention, start here.
The bike will not power on
Drop the pack from its mount and seat it back until it latches, because a pack just short of home makes no contact. Press the power button and watch the indicator. 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, and dust on the contacts is the usual culprit.
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. A contaminated rotor loses bite too, so clean it with isopropyl alcohol before assuming the system is at fault. Never ride the higher modes on a brake you have not felt bite properly yet.
The brake cut-out stopped working
The cut-out lives in the lever body, so check the lever connector first, because a half-seated plug imitates a dead sensor. Confirm the motor actually stops when the lever moves a few millimetres. If the cut still does not trigger, stop riding the higher modes and contact support before the next session. Keep riding in the lowest mode only until the cut-out is confirmed working again.
Run time keeps getting shorter
Compare riding style first, because full-mode riding on grass uses far more per minute than gentle cruising. Check both tire pressures, since soft fat tires cost range as rolling resistance rises. If habits have not changed, run one full uninterrupted charge cycle and retest before judging the pack. Cold weather trims every lithium pack, so expect shorter rides in winter, and spin each wheel once to make sure the brakes are not dragging.
The battery will not latch in the mount
Look for grit or a pebble in the mount rails, because the latch needs a clean seat to engage. Check that the pack is oriented correctly, since the tool-style connectors only align one way. If the latch moves but will not hold, the catch spring may need a look from support. A smear of dry lubricant on the latch pin keeps the click crisp without attracting grit.
The bike pulls to one side
Match both tire pressures first, because an uneven fat tire steers the whole bike. Check the axle nuts and the fork alignment after any drop or transport knock. If the pull continues with everything even, have the wheels trued and the alignment checked before returning to the higher speed modes. Test the fix on a quiet driveway at low speed first.
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-2958547.
The HKM-2958547 is a powerful bike for riders aged five to twelve, so an adult stays within arm’s reach until the rider has proven braking judgement in every speed mode 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 lowest mode and let the cut-out switch and 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 indicator shows full.
HKM-2958547 - 20-inch fat tire electric balance bike for kids aged five to twelve, with an 800W brushless spoke hub motor, a 36V 5.0Ah lithium drop-down battery, three selectable speed modes, hydraulic disc brakes front and rear with a brake cut-out switch, and a rigid 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.
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.
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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.
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Return Eligibility
30-Day Window
Request a return within 30 days of delivery.
Original Condition
Unworn or unused, with tags and original packaging.
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A receipt or order number is required.
Fast Refund
Refund processed within 10 business days.
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Returns & Exchanges Overview
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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
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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.
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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
