Jasion Thunder Pro ST 2000W Step-Through Electric Bike

The Jasion Thunder Pro ST is a step-through version of the Thunder Pro, built for riders who want the same fat-tire performance in a frame that's easier to mount and dismount. Its lowered top tube makes it a practical choice for commuting, off-road riding, hunting trips, camping, and general everyday convenience, while its 26 x 4-inch fat tires and full-suspension chassis keep it stable across pavement, gravel, sand, snow, and uneven trails.

A brushless hub motor delivers 1,200W of sustained power with a 2,000W peak and 115 N·m of torque, giving the Thunder Pro ST a stated top speed of 35 mph. Its 52V 20Ah (1,040Wh) battery provides a maximum range of up to 90 miles per charge, with fast charging from 15% to 80% in about 5 hours. A Shimano 7-speed drivetrain, five pedal-assist levels, and a motorcycle-style twist throttle let riders choose how much power they want at any given moment.

A responsive front suspension and an upgraded rear soft-tail system absorb bumps and hard impacts on rough terrain, and front and rear 7.1-inch hydraulic disc brakes provide reliable stopping control in a range of conditions. A color LCD display shows speed, battery level, and mileage, and the Thunder Pro ST connects to a compatible iOS or Android smartphone app for monitoring the battery, tracking rides, and adjusting settings. Integrated headlight, brake light, and turn signals support visibility, while a thickened ergonomic saddle and rear cargo rack add comfort and cargo-carrying capability. The Thunder Pro ST is certified to the UL 2849 safety standard and arrives 85% assembled.

Key Features

• Step-Through Frame: The lowered top tube makes mounting and dismounting easier.
• Motor Performance: Delivers 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 stated maximum range of up to 90 miles.
• Full Suspension: A responsive front suspension and upgraded rear soft-tail system help absorb bumps and impacts on rough terrain.
• Hydraulic Braking: Front and rear 7.1-inch hydraulic disc brakes provide responsive stopping control.
• All-Terrain Tires: The 26 × 4-inch puncture-resistant fat tires provide grip and stability across pavement, gravel, sand, snow, and trails.
• Shimano Drivetrain: A Shimano 7-speed drivetrain supports shifting across different riding conditions.
• Twist Throttle: The motorcycle-style twist throttle provides direct motor control.
• Smartphone Connectivity: Allows riders to monitor the battery, track rides, customize settings, and plan routes from a compatible smartphone.
• Integrated Lighting: Includes a headlight, brake light, and turn signals for visibility and directional signaling.
• Color Display: Shows essential ride information, including speed, battery level, and mileage.
• Rear Cargo Rack: Provides a mounting platform for suitable bags, cargo boxes, and other cargo accessories.
• Comfort Saddle: Features a thickened ergonomic design with high-resilience padding.
• Safety Standard: Certified to UL 2849.

Specifications

• Motor: Brushless hub motor; 1,200W sustained output and up to 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
• Partial Charging Time: Approximately 5 hours from 15% to 80%
• Charger: Standard US 2.0A charger
• Throttle: Twist throttle
• Sensor: Cadence sensor
• Pedal Assist: Levels 0–5
• Operating Modes: Pedal assist and throttle
• Drivetrain: Shimano 7-speed
• Brakes: Front and rear 7.1-inch hydraulic disc brakes
• Suspension: Full suspension with a hydraulic suspension fork and lockout
• Tires: 26 × 4-inch puncture-resistant 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 ST electric bicycle × 1
• 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