Roll-Road
Emma 4.0 Dual Battery Long Range Fat Tire Ebike
Regular price
$1,999.00
Regular price
Sale price
$1,999.00
Save
$600.00 (23%)
Unit price
per
Offer ends on:
00
Days
00
Hours
00
Minutes
00
Seconds
Max Power
2.2kW Peak
(1500W)
2.2kW Peak
(1500W)
Battery Capacity
2.08 kWh
(2×52V 20Ah)
2.08 kWh
(2×52V 20Ah)
Max Range
150 Mi
150 Mi
Max Speed
35 MPH
Off-Road
35 MPH
Off-Road
Max Grade
30%
(16.7°)
30%
(16.7°)
Max Load
450 Lbs
450 Lbs
Free shipping
21-Day Return
2-Year Warranty
•
Class 2 E-Bike
Compliant with U.S. federal regulations
•
User-Friendly Step-Through Frame
The low step-through design makes getting on and off the bike effortless.
•
In Stock & Shipping
Ship out within 12 hours
•
Free Fast Shipping
Ships to the lower 48 U.S. states
•
Local Pickup Add
611 Reyes Dr, Walnut, CA 91789
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Waterproof
Waterproof
IP67 Electrical System, IPX4 Battery & Motor, IP54 Full E-Bike Protection
Built for Real Urban Life
Integrated.
Stable.
Silent.
Emma 4.0 upgrades the side-mounted battery of Emma 3.0 to a sleek, fully embedded design. Integrated into the frame, the new battery bay eliminates vibrations and rattling—even on rough roads—for a smoother, quieter ride. It also lowers the center of gravity, improving stability, handling, and balance, while giving the bike a cleaner look.
Absolute Stop
Upgraded to 203mm hydraulic brake rotor (up from original 180mm) for stronger, consistent stopping power.
Everyday Essentials
Thoughtfully equipped for your everyday ride.
Motor & Power
52V advanced system for greater efficiency and smoother power. 1500W BAFANG SUTTO motor delivers strong, instant acceleration—perfect for cargo and steep hills.
450 LB Unbeatable Payload
Made of 10mm thick 6061 aluminum alloy, delivering superior 450LB load capacity.
CST SCOUT CST
Tailored for E-MOPED, the CST SCOUT is a high performance tire with compound pattern for road and cyclocross.
For Safety
Designed to see and be seen.
Ergonomic Cushioned 18" Saddle
Soft yet supportive: thick padding, wide long seat and premium suspension deliver all-day comfort on long rides.
Largest Cargo Capacity
Turn your EMMA4.0 into a multi-purpose e-bike—pair the rear rack with our Passenger Seat and Cargo Trunk for max capacity.
GENERAL
| Range | 150 Mi(240KM) range |
| Speed | 35 MPH(56KM/H) Unlocked |
| Weight Capacity | 450 Lb(200KG) |
| Hill Climbing | The slope percentage is 30%,Up to slope 16.7° |
| Full Suspension | Dual Hydraulic Suspension Real Nitrogen Air Shocks |
| PAS | 0-5 Level |
| Bike Weight | 110 lb(50KG)/84 lb (38KG) *w/o battery* |
| Transmission | Single Speed SHIMANO |
ELECTRICAL & POWER
| Motor | 1500W (2200W Peak) BAFANG SUTTO |
| Throttle | Half Twist Throttle |
| USB | 1A USB Port |
| Turn Signal | LED Turn Signals |
| Headlight | Led 2000 lumen headlight |
| Battery | 52V/20Ah×2 |
| Speed Sensor | Center Axle Torque Sensor |
| 4'' Color Display | Smart display |
| Charger | Faster 3A Charger |
| Controller | 32 Amp |
COMPONENTS
| Front Fork | Double crown hydraulic suspension Adjustable with lockout |
| Wheels | Aluminum Alloy |
| Headlight | LED 2000 Lumen Headlight |
| Brake Rotor | 180mm Rotor |
| Fenders | Front and Rear Fenders Included |
| Chain | KMC Dacromet Surface Anti Rust chains |
| Rear Suspension | 0.4mpa motorcycle air shocks adjustable hydraulic suspension |
| Tires | CST SCOUT 20"x4.0" with Reflective Strip |
| Tail Light | LED Brake Light & Turn Signals |
| Saddle | Ergonomic Cushioned Saddle |
| Brakes | 4-Piston Hydraulic Brakes |
| Pedals | Wellgo Pedals |
Size And Fit
| A Handlebar Height | 43.8"（111 cm） |
| B Total Length | 68.5"（174 cm） |
| C Wheelbase | 45.7"（116 cm） |
| D Seat Height |
18" Seat Height: 35''（89 cm） 24" Seat Height: 34''（86 cm） Lower Seat Height: 33''（84 cm） |
| E Chainstay Length | 25.2"（64 cm） |
| F Wheel Diameter | 22.4"（57 cm） |
| G Seat Length | 18"（46 cm） |
| H Rack Length | 8.7"（22 cm） |
| I Head Tube Length | 6.3"（16 cm） |
| J Handlebar length | 28.6"（73 cm） |
The 35"/89cm highest seat on the Moped-style E-bikes market. Other Moped Ebikes are usually no more than 33"/84cm, We consider the legs extension, compatible with the Torque Sensor to improve riding comfort Suitable for 5'3" and above
Verified Performance By Industry Experts
Real tests. Real results. Watch top reviewers experience the Emma 4.0’s power, comfort, and ride quality for yourself.
RollRoad Comparison Guide
RollRoad E-Bike Comparison | EMMA 4.0 vs LEON
Comparing the RollRoad EMMA 4.0 and RollRoad LEON electric bikes side by side — motor power, torque, top speed, suspension, and included accessories — to help you choose the right moped-style ebike for city commuting, cargo hauling, or off-road adventure.
EMMA 4.0
Comfort & long-distance riding
Stable · Comfortable · Effortless
LEON
Adventure & off-road exploration
Powerful · All-Terrain · Adventure-Ready
Quick Comparison
At a glance| Emma 4.0 | Leon | |
|---|---|---|
| Riding Style | Stable · comfortable · effortless | Powerful · All-Terrain · Adventure-Ready |
| Frame Style | Reinforced Step-Through Aluminum Alloy Frame | Reinforced Step-Through Aluminum Alloy Frame |
| Top Speed | 35 MPH (20 MPH default) | 40 MPH (20 MPH default) |
| Payload Capacity | 450 lbs | 450 lbs |
| Best For | Heavy-Duty Riders, City Commuting, Urban Trips & Leisure Rides | Heavy-Duty Riders, All-Terrain Riding & Outdoor Adventures |
Performance
Motor & drivetrain| Emma 4.0 | Leon | |
|---|---|---|
| Motor | 1500W (peak 2200W) | Front 750W + Rear 1500W (peak 3500W) |
| Battery | Dual 52V 20Ah batteries | Dual 52V 20Ah batteries |
| Controller | 32A controller | Dual controller (front 23A / rear 32A) |
| Torque | 110N·m | 90N·m + 110N·m (200N·m） |
| Charger | 3A fast charger with cooling fan | 3A fast charger with cooling fan |
| Riding Modes | Adjustable PAS 0–3 / 0–5 | Adjustable PAS 0–3 / 0–5 |
Ride Comfort & Control
Suspension & handling| Emma 4.0 | Leon | |
|---|---|---|
| Pedal Sensor | Torque sensor | Torque sensor |
| Display | 4″ color LED display | 4″ color LED display |
| Front Suspension | Dual-crown hydraulic adjustable fork, 80mm Travel | Motorcycle-grade inverted hydraulic fork, 80mm Travel |
| Rear Suspension | Adjustable air suspension | Adjustable air suspension |
| Tire | 20″ × 4″ CST Scout | 20″ × 4″ Innova |
| Transmission | Single speed | Single speed |
Design & Practical Features
Fit & included gear| Emma 4.0 | Leon | |
|---|---|---|
| Seat Height | 35″ / 88.9cm | 35″ / 88.9cm |
| Recommended Rider Height | 5'2″–6'4″ | 5'2″–6'4″ |
| Weight | 84 lbs / 110 lbs with battery | 94 lbs / 120 lbs with battery |
| Seat Options | Standard, long, lower seat | Standard, long, lower seat |
Frequently Asked Questions
Emma 4.0 vs LeonIs the RollRoad Leon faster than the Emma 4.0?
Yes. Leon has a 40 MPH top speed compared to Emma 4.0's 35 MPH. Both ship with a 20 MPH default limit for street-legal riding.
Which RollRoad ebike is better for off-road riding?
Leon's dual-motor system, motorcycle-grade inverted front fork, and Innova knobby tires make it better suited for off-road riding. The knobby tire design provides improved grip and traction on loose surfaces, while Emma 4.0 is tuned for stable, comfortable long-distance riding.
Do Emma 4.0 and Leon have the same range and payload capacity?
Both EMMA 4.0 and LEON support up to 450 lbs of payload and feature dual 52V 20Ah batteries. However, LEON's dual-motor system consumes more energy, so its real-world range may be slightly lower than EMMA 4.0 depending on riding conditions and power usage.
Does the RollRoad LEON have a more powerful motor than the EMMA 4.0?
Yes. LEON features a dual-motor system with a 750W front motor and a 1500W rear motor, delivering enhanced power, traction, and control for challenging terrain. EMMA 4.0 is equipped with a powerful 1500W BAFANG rear motor, providing smooth and reliable performance for daily riding, commuting, and long-distance adventures.
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