4000W Mid-Drive Power. 45° Climbing Capability.
Delivering over 250N·m of torque through a purpose-built drivetrain and full suspension platform, the SM4 PRO is engineered for serious off-road riding.
SM4 Pro Mid-Drive Electric Dirt Bike
High-Performance 4000W Mid-Drive Off-Road Electric Dirt Bike
$1,499.00
Save
$100
New Release: Special launch offer for a limited time!
Use code SM4PRONEW for an exclusive $100 OFF to celebrate our new arrival!
Ships from California, USA
- Fast & Free Domestic Shipping
-
Order Processing: 1–2 business days.
Shipping Time: 1–5 business days.
Delivered within 2–7 business days (48 contiguous United States). - Receive a confirmation email + tracking once shipped.
Main Features
- 4000W Mid-Drive Motor with a 60V high-output system delivering ≥250N·m max torque and a thrilling 45MPH top speed.
- 22.5Ah Quick-Charge Battery featuring a rapid 5-hour full charge profile for prolonged off-road exploration.
- Two-Stage Transmission utilizing an advanced dual belt and chain drive architecture that radically minimizes power loss.
- Pro Full Suspension with 150mm front fork travel and a 40/200mm adjustable rear mono-shock to absorb extreme terrains.
- Hydraulic Brakes & IP65 pairing responsive dual disc brakes with full-body water protection to conquer harsh weather.
Size & Fit
Technical Specifications
Performance
Peak output
4000W (Mid-Drive Motor)
Torque
≥250 N·m
Top speed
45 MPH
Battery
Battery
60V 22.5Ah
Range
50–55 miles
Charge time
5 Hours (Fast Charge)
Ride & Control
Suspension
Front Fork (150mm Travel) + Adjustable Rear Mono-Shock (40/200mm)
Brakes
Hydraulic Disc Brakes (Front: 220mm / Rear: 203mm, 2.2mm Thickness)
Drivetrain
Dual Belt & Chain Two-Stage Transmission
Size & Weight
Rider height
5.0 ft+
Bike weight
119.05 lbs (Net Weight)
Dimensions
70.28" L x 27.56" W x 40.35" H
*Range varies by terrain, riding style, rider weight, and complex off-road conditions.
Pairs well with
SM4 Pro Mid-Drive Electric Dirt Bike
Green
$1,499.00
Built For The Absolute Wild
Explore the high-performance engineering inside the SM4 PRO. From a high-torque mid-drive platform to a race-tuned heavy-duty chassis.
60V 22.5Ah Electric Dirt Bike Battery
60V | 22.5Ah | 1350Wh
The 60V high-voltage platform delivers stronger acceleration, extended riding range, and stable power output from full charge to low battery levels.
4000W Mid-Drive Electric Bike Motor
4000W | 250N·m+
The 4000W mid-drive motor delivers over 250N·m of torque, providing explosive acceleration, exceptional hill-climbing performance, and balanced handling on technical off-road terrain.
Belt + Chain Dual Transmission
Dual Drive System
A dual-stage belt and chain drivetrain improves power transfer efficiency while reducing drivetrain stress during high-torque off-road riding.
Long-Travel Full Suspension System
150mm Front | 40/200mm Rear
Long-travel suspension smooths out rocks, roots, drops, and rough trails while maintaining traction, stability, and rider confidence.
45° Hill Climbing Capability
45° Max Grade
High torque output and optimized gearing enable confident climbing on steep grades, loose gravel, rocky ascents, and technical trails.
Hydraulic Disc Brake System
220mm Front | 203mm Rear
Quad-piston hydraulic brakes with oversized rotors provide powerful stopping force, precise control, and reliable performance on steep descents.
The $1,499 Reality Check
At the exact same price point, don't settle for a basic commuter. SM4 PRO delivers true motocross engineering.
Motocross performance — not commuter compromises.
|
SAME PRICE
Typical eBikes |
||
|---|---|---|
| Tier 1: Ride Experience | ||
| Power & Torque |
4000W Mid-Drive
≥250 N·m instant torque
✔ Extreme hill climbing
|
750W Rear Hub
Standard hub platform
Flat streets & light trails
|
| Riding Stance |
Heavy-Duty Footpegs
Motocross stance • No pedal strikes
✔ Full body control
|
Bicycle Pedals
Traditional bicycle geometry
Seated urban cruising
|
| Tier 2: Control & Safety | ||
| Suspension |
150mm Front / 200mm Rear
Motorcycle-grade full system
✔ Absorbs massive drops
|
80mm Front Only
Rigid rear frame
Minor pavement bumps
|
| Braking |
Quad-Piston + 220mm Discs
Oversized heavy rotors
✔ One-finger high-speed stop
|
Dual-Piston + 180mm Discs
Standard mechanical/hydraulic
Predictable city stops
|
| Tier 3: Long-Term Value | ||
| Battery |
60V 22.5Ah High-Voltage
Zero voltage sag under load
✔ Full power from 100% to 1%
|
48V Standard Battery
Standard consumer cells
Output drops under continuous load
|
| Drivetrain |
Dual Drive (Belt + Chain)
Dual-stage transmission
✔ Low-maintenance reliability
|
7-Speed Shimano
Bicycle derailleur setup
Built for casual pedal fitness
|
|
Final Verdict
SM4 PRO
True Off-Road Performance Machine engineered for tracks and high-torque thrills.
VS
Typical eBikes
City commuters modified with wider tires for casual neighborhood cruising.
|
||
| Frame Design |
Motocross Cradle Frame
Zero flex under heavy abuse
✔ Built for track jumps
|
Commuter Geometry
Utility pavement frame
Optimized for street comfort
|
| Value Focus |
100% Powertrain Focus
Every dollar goes to performance
✔ Maximum spec per dollar
|
Retail Markup Focus
Includes racks & fenders
Mass-market lifestyle focus
|
Why SM4 PRO Wins
At $1,499, don't settle for less.
4000W Power
SM4 PRO
4000W
Mid-Drive
Typical
750W
Hub Motor
✔ Extreme torque for tracks & hills.
Suspension
SM4 PRO
Full Sys
150/200mm
Typical
Front Only
80mm
✔ Motorcycle-grade terrain absorption.
Braking
SM4 PRO
Quad-Pist
220mm Discs
Typical
Dual-Pist
180mm Discs
✔ Safe, instant high-speed stops.
Battery
SM4 PRO
60V System
22.5Ah Pack
Typical
48V System
Standard Pack
✔ Consistent power with zero voltage sag.
Verdict
- ✔ Dirt-Track Ready Layout
- ✔ 4000W High-Torque Motor
- ✔ Moto Full Suspension
- ✔ Quad-Piston Safe Brakes
Who Is SM4 PRO Built For?
Engineered with a 4000W mid-drive motor and a purebred electric dirt bike chassis. Made for riders who demand brutal torque, long travel suspension, and zero pedaling limitations.
Best For Serious Off-Road Riders
- Riders seeking a full-size electric dirt bike with aggressive motocross-inspired ergonomics.
- Exploring mountain trails, sand dunes, forest tracks, and demanding off-road terrain.
- Conquering steep climbs with 4000W mid-drive power and 45° hill-climbing capability.
Not Recommended For
- Urban commuters primarily riding paved roads and city bike lanes.
- Riders looking for a lightweight folding electric bike for daily transport.
- Casual recreational riders who do not require high-power off-road capability.
← Swipe to check suitability →
Which Seemoon Model Fits You Best?
Choose SM4 PRO →
Best for riders seeking maximum torque, aggressive trail performance, and true electric dirt bike capability.
Choose SM3 →
Best for riders who want powerful performance, longer range, and fully functional pedal-assisted riding.
Choose SM8 / SM2 →
Best for everyday all-terrain exploration, recreational trail riding, and versatile outdoor adventures.
← Swipe to compare models →
The SM4 PRO is purpose-built for riders searching for a high-power electric dirt bike, full suspension electric bike, or mid-drive off-road ebike capable of handling extreme terrain.
Two colors.
One unstoppable mid-drive force.
Choose the look that fits your terrain—the SM4 Pro is available in two aggressive finishes, built on the same 4000W mid-drive platform.
Same explosive 250N·m torque. Same heavy-duty professional suspension. Different armor, same lethal dirt-track personality.
Every Single Detail. Fully Disclosed.
From the motocross-grade cradle frame to the high-voltage powertrain, explore the professional manufacturing and uncompromised quality assurance behind the SM4 PRO.
Technical Specifications
Heavy-duty 60V motocross platform built for zero power drop.
Specs
Geometry & Fit
High-tensile cradle chassis engineered for rock-solid stability.
Details
What’s in the Box
Arrives securely boxed and 85% pre-assembled.
Box list
FAQs
Below are answers to the most common questions about SM4 Pro.
Does the SM4 PRO have pedals?
Yes. The SM4 PRO comes equipped with fully functional pedals.
Unlike a traditional electric dirt bike, the SM4 PRO combines a high-performance mid-drive motor with a pedal-assisted drivetrain, giving riders greater control on technical trails, extended riding range, and a more natural riding experience. The pedal system also helps improve efficiency during long-distance off-road adventures and steep climbs.
What motor does the SM4 PRO use?
The SM4 PRO is powered by a 4000W mid-drive motor system.
The centrally mounted motor delivers power through the drivetrain rather than directly through the wheel, resulting in improved weight distribution, better handling, and stronger climbing performance. The system produces up to 250N·m of torque, making it capable of tackling steep hills, loose terrain, and demanding off-road conditions.
What battery does the SM4 PRO use?
The SM4 PRO features a 60V 22.5Ah lithium battery with a total capacity of 1350Wh.
Its high-voltage platform provides more consistent power delivery compared with many traditional 48V systems. Combined with an intelligent Battery Management System (BMS), the battery helps maintain stable performance during long rides, high-speed operation, and extended hill climbing.
Why does the SM4 PRO use a Belt + Chain drive system?
The SM4 PRO uses a dual-stage Belt + Chain transmission system to handle high motor output efficiently.
The belt drive helps reduce noise and vibration while providing smooth initial power transfer. The heavy-duty chain drive then delivers torque directly to the rear wheel, offering the durability and strength required for aggressive trail riding and high-power off-road use.
Can the SM4 PRO climb a 45° incline?
Yes. Under appropriate riding conditions, the SM4 PRO is designed to handle slopes of up to 45°.
Its combination of a 4000W mid-drive motor, 250N·m torque output, and optimized drivetrain allows the bike to maintain traction and climbing power on steep dirt trails, rocky terrain, and loose gravel surfaces. Actual performance may vary depending on rider weight, terrain conditions, and tire grip.
What suspension and braking system does it use?
The SM4 PRO features a full-suspension setup designed for serious off-road riding.
The front suspension offers 150mm of travel, while the hydraulic rear shock provides 40/200mm rear suspension travel for improved comfort and traction on rough terrain. Braking performance comes from hydraulic disc brakes paired with oversized 220mm front and 203mm rear rotors, helping deliver strong and consistent stopping power.
Is the SM4 PRO waterproof?
The SM4 PRO is rated IP65 for water and dust resistance.
The electrical system is designed to withstand rain, mud, splashes, and dusty trail environments encountered during normal riding. However, like most high-performance electric bikes, it should not be submerged in water or exposed to prolonged high-pressure washing.
Who is the SM4 PRO best suited for?
The SM4 PRO is designed for riders seeking high-performance off-road capability.
It is ideal for trail riders, adventure enthusiasts, hill-climbing enthusiasts, and anyone looking for a powerful electric dirt bike with pedal functionality. Riders who frequently tackle mountain trails, forest roads, gravel routes, and challenging terrain will benefit most from the SM4 PRO's combination of power, suspension travel, and torque.
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