Balance Bikes >>
HKM-5088467 20-Inch Electric Mountain Bike with Brushless Hub Motor, Hydraulic Disc Brakes and 80mm Adjustable Front Suspension
HKM-5088467
A Real Mountain Bike, Scaled for Young Riders
The HKM-5088467 is the FXB01, a 20-inch electric mountain bike that gives young riders genuine trail hardware instead of a toy. A brushless hub motor with 50 to 60 Nm of torque drives a lightweight aluminium alloy frame, front and rear hydraulic disc brakes deliver the smoothest stops in the lineup, and an 80mm suspension fork soaks up the roots and rocks that rigid forks rattle over. The 36V lithium pack carries up to 15 miles per charge and refills in 60 to 90 minutes, the saddle adjusts from 58 to 68 cm.
Key Features
Six details that define how the HKM-5088467 rides.
A Brushless Hub With 50-60 Nm
Torque arrives early and evenly, which is what climbs a gravel incline without jerking. The hub design means no chain to guard and no sprocket to align, and the pull stays smooth from standing start to top speed.
Hydraulic Disc Brakes, Both Ends
Hydraulics give one-finger stopping power with a bite that modulates instead of grabbing. On descents and loose ground this is the brake that keeps young riders calm, and it stays consistent through a full season of trail dust.
An 80mm Suspension Fork
The adjustable front fork absorbs the roots, rocks and kerb hits that a rigid fork sends straight to the hands. It keeps the front wheel tracking on rough descents, which is exactly what a young mountain rider needs to stay confident.
15 Miles of Range
The 36V lithium pack carries up to 15 miles per charge, enough for a proper trail morning with the return leg included. Charging takes 60 to 90 minutes, so a lunch break resets it for the afternoon.
20-Inch One-Piece Wheels
The aluminium one-piece wheels keep weight low and spoke maintenance off the list entirely. The 20-inch diameter rolls over trail obstacles that trap smaller wheels, holding a line through gravel and ruts.
A Seat and Speeds That Adapt
The saddle travels from 58 to 68 cm through the growth years, and two speed settings put 12 mph under the beginner and 25 mph under the experienced hand. The bike adapts to the rider instead of the other way round.
Overview
A 20-inch electric mountain bike with hydraulic disc brakes and suspension.
The HKM-5088467 is the FXB01, a 20-inch electric mountain bike built for young riders who have outgrown the sidewalk. A brushless hub motor with 50 to 60 Nm of torque drives a lightweight aluminium alloy frame, and the suspension fork offers 80mm of travel to smooth the trail ahead. Front and rear hydraulic disc brakes provide the most controlled stopping power available at this size, the 36V lithium pack delivers up to 15 miles per charge in 60 to 90 minutes of charging, and two speed settings pace the ride at 12 or 25 mph. The one-piece aluminium wheels and 58 to 68 cm saddle range round out a platform designed to be handed down rather than traded in.
Hydraulics on a Kid’s Bike
One-finger brakes that modulate, not grab.
The front and rear hydraulic disc brakes are the headline: one finger stops the bike, the bite builds progressively, and loose gravel no longer turns a squeeze into a skid. It is the control adult bikes take for granted, built into the HKM-5088467 from the start.
Full Specifications
Everything worth knowing, in one table.
Why Suspension Belongs on This Bike
Trails teach better when the bike absorbs the hits.
A rigid fork teaches a rider to dodge every root; a suspension fork teaches them the trail is rideable. The HKM-5088467 puts 80mm of travel up front so the wheel stays down and tracking when the ground turns rough, and the hands stay fresh long enough for the brake lessons to land. The 50 to 60 Nm hub gives the climb the same courtesy, pulling steadily where weaker motors stall and frustrate. Around that hardware sits a light aluminium alloy frame with a 58 to 68 cm saddle range, one-piece wheels that never need truing, and hydraulic brakes whose bite the rider can trust in wet grass or dry dust. This is the bike that turns park laps into trail rides.
What’s in the Box
What arrives in the box, ready to build.
1 x 20-Inch E-MTB
Frame, fork and wheels come fitted
1 x 36V Lithium Battery
Pack seated in the frame mount
1 x Mains Charger
Matched to the battery pack from the factory
1 x Seat and Post
Fitted, ready to set for height
1 x Manual and Hex Keys
Setup sheets with the tools supplied
1 x Warranty Card
Registration details for the records
Why Choose the HKM-5088467
Six reasons families pick the HKM-5088467.
Trail Hardware, Kid Sized
A suspension fork, hydraulic brakes and a torque-rich hub are the three upgrades that define a real mountain bike, and all three are here. Nothing about the platform is a toy except maybe the smile it produces.
Braking That Builds Trust
Hydraulic discs modulate instead of grabbing, so young riders learn to feather a brake rather than fear it. That trust shows up everywhere: steeper descents, tighter corners, calmer parents.
Range for Real Trail Days
Up to 15 miles per charge covers a morning of laps with the climb home included. The 60 to 90 minute recharge fits inside lunch, and the day resumes without negotiation.
Climbs That Do Not Stall
Fifty to sixty Nm of hub torque keeps the bike moving up gravel inclines that frustrate lesser motors. Hills become features instead of walk zones, which keeps the ride honest.
Wheels With No Spokes
The one-piece aluminium wheels never need truing and shrug off the impacts that bend spoked wheels out of line. Less maintenance, more riding, and a straight bike all season.
It Grows, Then Gets Handed Down
The saddle range, two speed modes and rugged build mean one bike serves several riders and several seasons. The durable hardware is what makes hand-me-downs actually work.
Frequently Asked Questions
Straight answers about the HKM-5088467.
What ages and heights does the HKM-5088467 fit?
The saddle adjusts from 58 to 68 cm, which covers most riders in the five-to-twelve band depending on leg length. The honest check is both feet flat while seated. Because this bike carries suspension and speed, also confirm the rider can comfortably hold the bars at full arm extension before choosing the higher speed mode. The 20-inch wheels also raise the saddle floor, so riders between sizes should size up for leg room.
How fast does it go?
Two speed settings cap the ride at roughly 12 mph and 25 mph, with terrain and rider weight deciding where in between the bike settles. The low mode is the learning mode, and the high mode suits open trails and experienced hands. Pick the mode for the path, and the top end stays headroom rather than a habit. The mode switch lives on the frame within adult reach.
How far does one charge go?
Up to 15 miles per charge on gentle throttle, less on repeated climbs or at sustained top speed. The 36V pack recharges in 60 to 90 minutes, which is short enough to plan around. The practical habit is riding out with the return leg in reserve and checking tire pressure weekly. A pressure check costs nothing and saves miles, though range figures assume flat ground.
Do hydraulic brakes need maintenance?
Very little. The system is sealed, so there is nothing to lubricate, and pad wear at this power level is slow. Check the lever feel weekly: a bite well before half travel means all is well, a spongy lever means air in the line and a visit to support. Keep the rotors clean with isopropyl alcohol after muddy rides. A firm lever with a clean rotor is the healthy baseline.
How should the suspension fork be set up?
Set the preload or sag so the fork compresses about a fifth of its travel with the rider seated. Too soft and it pogo-sticks under braking, too firm and it might as well be rigid. After muddy rides, wipe the stanchions clean so grit never gets dragged past the seals. Store the bike fork-up so the seals stay lubricated evenly.
What assembly and upkeep are involved?
Assembly covers the handlebar, seat height, fork setup and battery seating, with the supplied hex keys and the manual. Beyond that: tire pressure, a brake squeeze test, clean stanchions and a wipe-down. There is no chain on the bike, so nothing needs oiling or tensioning all season. The whole list fits a weekend morning, and the hex keys live with the manual.
Quick Troubleshooting
When the HKM-5088467 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 half an hour 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 brake lever feels spongy
A spongy hydraulic lever means air in the line, not a worn pad, and bleeding the system is a job for support or a shop. First confirm the lever still bites and the rotor is clean, then contact support with a note of when the feel changed. Spongy levers are a support job, not a trailside fix, so stay off technical trails until the firm bite returns.
The fork lost its smoothness
Wipe the stanchions with a clean cloth and check for dried mud, which drags past the seals. Cycle the fork through its travel a few times to redistribute the lubricant. If the stiction persists with clean stanchions, note when it started and contact support before disassembling anything. A sag check takes a minute and keeps the setup honest.
The range keeps shrinking
Compare riding style before blaming the pack, because climbing and top-speed running use far more per mile than cruising. Check both tire pressures, 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. Log the loop you retest on, because different routes make different numbers, and pressure is the cheapest fix there is.
The front wheel shudders
Lift the front end and spin the wheel: a light rub is normal, a heavy grind is not. Check the axle nuts for torque, then watch the rotor run between the pads. A rhythmic rub points to a bent rotor, which needs straightening or replacing before the next proper ride. Recheck axle torque after the first hard rides, because new hardware settles.
The throttle surges under load
A pack running low makes the motor surge exactly on climbs, so start with a full charge. Check the throttle connector for a half-seated plug and keep the grip area clean and dry. If surging continues on flat ground with a full pack, note the mode and contact support about the controller. Water crossings deeper than the hub are best walked around, since a soaked connector can mimic a throttle fault. Note the mode in use when it happens.
Service & Policies
Coverage that rides every trail 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-5088467.
The HKM-5088467 is a fast electric mountain bike capable of 25 mph, so a certified helmet is mandatory before every ride. Start in the low speed mode and flat, open ground until the rider has both brakes and the throttle under smooth control, and let an adult approve every mode change. Confirm the battery is fully latched before each ride, squeeze both levers to feel the bite, and check the fork and axle hardware for torque. Keep fingers, laces and loose clothing clear of the rear hub, the rotors and the fork stanchions while the bike is 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-5088467 - 20-inch electric mountain bike with a brushless hub motor delivering 50-60 Nm of torque, a 36V lithium-ion battery with up to 15 miles of range per charge, two speed modes up to 25 mph, front and rear hydraulic disc brakes, an 80mm suspension fork, a 58-68 cm adjustable saddle and one-piece aluminium wheels. 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
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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.
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Delivery Process
Delivery Time Summary
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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.
How We Can Help
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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
