SKU: 78601122248

HKM-390035 250W Electric Mountain Bike with 36V 20AH Battery, 7-Speed Gears, and Disc Brakes

Sale price$495.00 Regular price$550.00
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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19

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Description

HKM-390035 250W Electric Mountain Bike with 36V 20AH Battery, 7-Speed Gears, and Disc BrakesHKM 390035 Electric Mountain Bike Elevate Your Adventure with Intelligent Electric Performance 250W Rear Hub Motor Efficient, silent, and responsive pedal assist 36V 20Ah Lithium Battery Up to 37+ miles (60+ km) range Quick 3 Hour Charge Minimal downtime, maximum exploration 7 Speed Drivetrain Seamless shifting for any gradient Introducing the HKM 390035, a purpose built electric mountain bike that redefines off road versatility and everyday

HKM-390035 Electric Mountain Bike

Elevate Your Adventure with Intelligent Electric Performance

250W Rear Hub Motor
Efficient, silent, and responsive pedal assist
36V 20Ah Lithium Battery
Up to 37+ miles (60+ km) range
Quick 3-Hour Charge
Minimal downtime, maximum exploration
7-Speed Drivetrain
Seamless shifting for any gradient

Introducing the HKM-390035, a purpose-built electric mountain bike that redefines off-road versatility and everyday practicality. At its core, a refined 250W rear hub motor delivers consistent, smooth assistance across diverse surfaces—from gravel pathways to paved city streets. The robust aluminum alloy frame, paired with 27.5 × 2.1-inch tires, strikes a careful balance between nimble handling and confident stability. Whether you’re tackling steep inclines or cruising open trails, the 7-speed drivetrain puts precise gear selection right at your fingertips, while the 36V 20Ah lithium battery ensures you can ride farther with peace of mind. Every element, from the mechanical disc brakes to the integrated mudguards, has been selected to enhance both safety and enjoyment. This is electric mountain biking shaped by real-world demands, delivered in a package that is as functional as it is exciting.

Crafted for riders who value efficiency and durability, the HKM-390035 adapts effortlessly to changing terrain. The geometry is designed for extended comfort, while the responsive motor engagement allows you to customize your level of exertion. Embrace the freedom to explore without boundaries—this e-bike empowers you to go further, climb higher, and experience the outdoors like never before.

Engineered for the Ride

Precision Motor Integration

The 250W rear hub motor delivers seamless torque application with minimal noise. Its clever power mapping responds naturally to your pedaling cadence, providing up to 20 mph (32 km/h) of pedal-assisted speed on demand. The system is optimized for energy efficiency, reducing battery consumption on flat stretches while supplying ample grunt on challenging ascents.

High-Capacity Lithium Power

A 36V 20Ah lithium-ion pack provides a real-world range exceeding 37 miles (60 km) on a single charge, depending on terrain, rider weight, and assist level. The battery management system safeguards against overcharge, deep discharge, and temperature extremes. Replenish energy in approximately 3 hours with the included charger, ready for your next outing.

Forged Aluminum Frame

The lightweight yet rigid aluminum alloy frame absorbs trail vibrations while maintaining precise steering feedback. Its geometry is tuned for confident handling across mixed surfaces, with a low standover height for easy mounting and dismounting. Corrosion-resistant finish ensures lasting aesthetics through seasons of use.

Mechanical Disc Braking

Equipped with front and rear mechanical disc brakes, the HKM-390035 delivers consistent, powerful stopping performance in wet, muddy, or dusty conditions. The large rotors dissipate heat effectively, reducing fade on long descents, while the ergonomic levers provide precise modulation for confident control.

7-Speed Precision Shift

A wide-ratio 7-speed cassette paired with a reliable derailleur gives you the right gear for every situation. Click through ratios effortlessly while climbing or sprinting, with indexing that stays accurate ride after ride. The system requires minimal maintenance and is widely serviceable.

27.5″ × 2.1″ All-Terrain Tires

The 27.5-inch diameter provides an optimal balance of rollover capability and agility. The 2.1-inch width offers a generous contact patch for traction on loose gravel, hardpack, and pavement, while still maintaining low rolling resistance. Durable tread compound extends tire life across varied landscapes.

Integrated Mudguards & Reflectors

Full-length front and rear mudguards shield you from spray and debris, keeping your clothing clean when the trail gets messy. High-visibility reflectors enhance your presence in low-light conditions, and the sturdy kickstand offers convenient parking anywhere.

Thoughtful Cockpit & Controls

An intuitive handlebar layout places the display, shifters, and brake levers within easy reach. The clear LCD readout shows speed, battery level, and assist mode at a glance. Ergonomic grips reduce fatigue on longer journeys, so you can focus on the trail ahead.

Technical Specifications

Motor 250W Rear Hub
Battery 36V 20Ah Lithium-ion
Range >37 mi (60 km)
Charge Time ~3 Hours
Top Assisted Speed 20 mph (32 km/h)
Frame Aluminum Alloy
Tire Size 27.5″ × 2.1″
Gears 7-Speed
Brakes Mechanical Disc (F/R)
Accessories Mudguards, Reflectors, Kickstand
Display LCD with Speed & Battery
Pedal Assist Modes Multiple Levels

Frequently Asked Questions

What is the real-world range of the HKM-390035?

The bike delivers over 37 miles (60 km) on a single charge under typical riding conditions with moderate pedal assist. Actual range may vary based on terrain, rider weight, wind, and assist level used.

How long does it take to fully charge the battery?

A complete charge from empty takes approximately 3 hours using the provided charger. The battery can be conveniently charged on or off the bike.

Can I ride this e-bike without electric assistance?

Yes, the 7-speed drivetrain allows you to pedal just like a traditional bicycle when the motor is turned off, with no additional drag from the hub motor.

Is the battery removable?

The battery is integrated into the frame for a clean look and low center of gravity, but it can be removed for servicing or replacement by a qualified technician.

What type of terrain is the HKM-390035 suitable for?

With its 27.5-inch tires and robust frame, it performs excellently on gravel paths, dirt trails, forest roads, and urban streets. The mechanical disc brakes provide reliable control in varied conditions.

Does it come fully assembled?

The bike arrives mostly assembled; you will need to attach the handlebars, front wheel, pedals, and seat. All necessary tools and a clear manual are included.

Your Purchase is Protected

Free Shipping on All Orders

Enjoy complimentary shipping to your doorstep, with no hidden fees.

180 Days Purchase Protection

Your investment is covered against defects for a full 180 days from delivery.

30-Day Money-Back Guarantee

Not completely satisfied? Return it within 30 days for a full refund.

24-Month Warranty Service

Ride with confidence knowing your e-bike is backed by a two-year warranty.

HKM-390035 Electric Mountain Bike — Ride Further, Adventure More.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78601122248

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Homicidal_dezi
Natrona Heights, US
★★★★★ 5
Solar system board book:EXCELLENT, INFORMATIONAL AND FUN
Format: Board book
My niece loved this book. As did I! I always found outer space fascinating, but have forgotten many facts from my youth. When I ordered it, read it through and was very happy about all the information packed I. Such a fun book. There is even an honorary mention of Pluto. Vibrant, fun, factual, EXCELLENT! she got a astronaut costume also, so now she’s got all the tools for her imaginary space travel.
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Reviewed in the United States on February 20, 2026
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S D
Lake Worth, US
★★★★★ 5
Great book for your little ones!
Format: Board book
One of the faccoutite book of our 2 year old - the pictures are great, and the fact for each planet is quite interesting.
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Reviewed in the United States on April 16, 2026
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Brianna C
Boise, US
★★★★★ 5
Our favorite book
Format: Board book
This is our favorite book to read. Its got a nice rhyming flow, its not too long, its fun information and the illustrations are adorable! We've used it so much we may need to buy another soon because of the wear and tear
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Reviewed in the United States on April 13, 2026
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Lego Buyer
Lowell, US
★★★★★ 4
Amazon should know how to deliver books without damaging.
Format: Board book, Format: Board book
This is a fantastic book and the back has fun facts, plus a dedication the minor planet Pluto that was not included. If you are Gen-x you know that acknowledging Pluto on the back just warms yor heart. Most of the science info is on the back cover. The board book focuses on naming the planets and the artistry. I think this is great and the extra facts on the back are better for older kids who might want to pretend they are too big for baby books. This is a really beautiful book, but there was damage. The lip is all suffered up and marred (2nd picture) and where you open the book (1st picture) there is already a wear crease. I blame the defects on Amazon, but a cellophane wrap might have helped prevent the damage
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Reviewed in the United States on November 2, 2025
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kirsten leisses
Dallas, US
★★★★★ 5
Fun way to learn about the planets
Format: Board book
An awesome book. One of my toddlers favorites. Love the cut outs and pictures as well as the content. Its a fun way to learn about the planets
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Reviewed in the United States on April 15, 2026

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