26" x 4" Puncture-Resistant Tires
26×4 fat tires deliver superior grip and stability, floating smoothly over snow, sand, and rough terrain—so you ride with more control and confidence in any condition.
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- Regular price
- $1,299.00
Estimated shipping time
Estimated shipping time
You can typically expect your items to arrive within 4–7 business days, depending on your location and product availability.
What is your Return Policy?
What is your Return Policy?
At Northgrid Supply, we want every customer to shop with confidence. If something doesn’t go as planned, we’ve made returns and refunds simple and fair. Here’s how it works:
1. Return Window
You can request a return within 30 days of receiving your order. Unfortunately, we’re unable to accept returns after that time frame.
2. Who Pays for Return Shipping?
- If your item arrives damaged, defective, or incorrect, we’ll cover the return shipping cost.
- If you’re returning an item because you changed your mind, you’ll be responsible for return shipping fees.
3. Damaged or Defective Items
Received something broken or not working properly? Contact us within 30 days. We’ll provide a prepaid return label and once the item is returned and inspected, we’ll issue either a full refund or a replacement—including any original shipping costs.
4. Changed Your Mind?
If you no longer want the item, you can return it within 30 days—as long as it's unused, in its original packaging, and in resellable condition. You’ll need to handle the return shipping, and once we receive and inspect it, we’ll refund the product cost (excluding shipping).
5. Refund Processing
Once we receive and approve your return, we’ll send a confirmation email and issue a refund to your original payment method within 7 business days. Please allow additional time for banks or credit card companies to process and reflect the refund.
If it’s been over 10 business days since your refund was approved and you still don’t see it, contact us at support@northgridsupply.com and we’ll look into it immediately.
6. Restocking Fees
In some cases, a restocking fee may apply depending on the item and return reason. If applicable, we’ll clearly communicate this during your return request process.
The Thunder Pro ST is a step-through fat-tire electric bicycle designed for easier mounting and everyday convenience. Its full-suspension system and 26 × 4-inch tires support commuting, off-road riding, hunting, camping, and travel across varied terrain.
It combines a 52V 20Ah battery with up to 2,000W peak motor output, a stated maximum range of 90 miles, and a top speed of 35 mph. Hydraulic disc brakes, a Shimano 7-speed drivetrain, integrated lighting, and smartphone connectivity provide additional control and functionality.
Top Speed
35 Mph
Motor Power
2000W
Battery
52V 20Ah
Max Range
90 Miles
Torque
115 N·m
Standard For Safety
UL 2849
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 180 mm 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.
Quality in Details
Connect. Ride. Explore.
Monitor your battery, track rides, customize settings, and plan routes all from your phone. Stay connected for a smoother ride.
Shimano 7-Speed
With the Shimano 7-speed drivetrain and motorcycle-style hand-twist throttle, enjoy smooth shifting and effortless control, whether you're accelerating, climbing, or cruising.
Headlight & Taillight
The high-brightness headlight lights the road in low-visibility conditions, the brake light activates instantly when you pull the lever, and built-in turn signals clearly show your direction.
Haul More, Ride Ready
The durable rear rack enhances versatility, making it perfect for carrying groceries, outdoor gear, or even an extra passenger. It easily fits bags, cargo boxes, and pet carriers—ready to ride. (Standard tail bag included)
Color Display
Displays critical ride data like speed, battery life, and mileage, with excellent visibility in all light conditions.
Extra-Comfort Saddle
Thunder Pro features an ergonomically designed, thickened saddle with high-resilience padding that provides lasting comfort and absorbs bumps from rough terrain.
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 180 mm 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
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Total price$5,295.00
$5,295.00