The Jasion Thunder Pro is a high-step, fat-tire electric bike built as a more powerful evolution of the original Thunder, aimed at commuters, hunters, campers, and off-road riders who want one bike that can do it all. Its high-step frame is designed for greater rigidity and a sportier riding position, giving it added stability at higher speeds and on rough terrain, while its 26 x 4-inch fat tires help with grip on wet pavement, snow, and other changing surface conditions.
The Thunder Pro's brushless hub motor delivers 1,200W of sustained output with a 2,000W peak and 115 N·m of torque, enough to reach a stated top speed of 35 mph. Its 52V 20Ah (1,040Wh) battery provides a maximum range of up to 90 miles per charge and supports fast charging from 15% to 80% in about 5 hours, while a Shimano 7-speed drivetrain, five pedal-assist levels, and a motorcycle-style twist throttle give riders full control over how the bike is powered.
A responsive front suspension fork works with an upgraded rear soft-tail system to absorb hard landings and rough trail impacts while keeping the frame stable, and front and rear 7.1-inch hydraulic disc brakes deliver precise stopping control in city traffic or on off-road descents. A color LCD display keeps riders informed of speed, battery level, and mileage, and the Thunder Pro can connect to a smartphone app for monitoring rides and adjusting settings. Integrated headlight, brake light, and turn signals support visibility, and a thickened ergonomic saddle plus rear cargo rack round out the bike's comfort and hauling capability. The Thunder Pro is certified to the UL 2849 electrical safety standard and arrives 85% assembled.
Key Features
• Motor Performance: Produces 1,200W of sustained power and up to 2,000W peak power with 115 N·m of torque.
• Long-Range Battery: The 52V 20Ah, 1,040Wh battery provides a maximum stated range of up to 90 miles.
• Maximum Speed: Reaches a stated top speed of 35 mph.
• Full Suspension: Front suspension and an upgraded rear soft-tail system help absorb impacts and uneven terrain.
• Hydraulic Braking: Front and rear 7.1-inch hydraulic disc brakes provide responsive stopping control.
• All-Terrain Tires: Equipped with 26 × 4-inch puncture-resistant fat tires for riding on streets, gravel, sand, snow, and trails.
• Drivetrain and Throttle: Combines a Shimano 7-speed drivetrain with a motorcycle-style twist throttle.
• Pedal Assistance: Provides five pedal-assist levels plus throttle operation.
• Connected Riding: Supports smartphone access for monitoring battery information, tracking rides, adjusting settings, and planning routes.
• Integrated Lighting: Features a high-brightness headlight, brake light, and turn signals.
• Ride Display: The color LCD displays information such as speed, battery level, and mileage.
• Cargo Capability: Includes a rear rack for carrying compatible bags, cargo boxes, and other suitable cargo accessories.
• Comfort Saddle: Features a thickened ergonomic saddle with high-resilience padding.
• High-Step Frame: Designed for frame rigidity, a sportier riding position, and stability during higher-speed or rough-terrain riding.
• Safety Standard: Certified to UL 2849.
Specifications
• Motor: Brushless hub motor; 1,200W sustained output and 2,000W peak output
• Torque: 115 N·m
• Top Speed: 35 mph
• Battery: 52V 20Ah
• Battery Capacity: 1,040Wh
• Maximum Range: Up to 90 miles
• Charging Time: 7–8 hours
• Charger: Standard US 2.0A charger
• Throttle: Twist throttle
• Pedal Assist: Levels 0–5
• Operating Modes: Pedal assist and throttle
• Sensor: Cadence sensor
• Drivetrain: Shimano 7-speed
• Brakes: Front and rear 7.1-inch hydraulic disc brakes
• Suspension: Full suspension with hydraulic suspension fork and lockout
• Tires: 26 × 4-inch fat tires
• Display: Color LCD
• Lights: Headlight, brake light, and turn signals
• Maximum Payload: 500 lb
• Product Weight: 82.5 lb
• Folding Frame: No
• Assembly: Arrives 85% assembled
Size Guide
• Size: One Size
• Recommended Rider Height: 5 ft 5 in to 7 ft 2 in
• A — Handlebar Length: 27.8 in
• B — Seat Tube Length: 18.3 in
• C — Chainstay: 22 in
• D — Ground Clearance: 5.1 in
• E — Wheelbase: 48.6 in
• F — Total Length: 78 in
• G — Wheel Diameter: 48.6 in
• H — Handlebar Height from Floor: 47.2 in
• I — Minimum Seat Height from Floor: 35 in
• J — Maximum Seat Height from Floor: 39 in

Compatibility
Compatible With: iOS and Android smartphones through the supported smart app
Included
• Thunder Pro electric bicycle × 1
• Front and rear fenders × 2
• Rear rack × 1
• Charger × 1
• Toolkit × 1
• Pedals × 2
• Kickstand × 1
• E-bike mirrors × 1
• Tail bag × 1
• Manual QR code card × 1