1. Introduction
Thank you for choosing the HITWAY BK9 Electric Fat Tire Mountain Bike. This manual provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your new electric bicycle. Please read this manual thoroughly before your first ride to ensure optimal performance and safety.
2. Safety Information
Your safety is paramount. Always wear a helmet and appropriate safety gear when riding. Familiarize yourself with local regulations regarding electric bicycles. For detailed safety guidelines, please refer to the official safety information document provided by HITWAY:
Download Safety Information (PDF)
Important Safety Notes:
- Perform a pre-ride inspection before each use.
- Do not operate the bike under the influence of alcohol or drugs.
- Ensure all components are securely fastened before riding.
- Be aware of your surroundings and ride defensively.
3. Package Contents
Upon unpacking, please verify that all the following items are included:
- HITWAY Electric Bicycle
- Charger
- Locks
- Pump
- User Manual (this document)
If any items are missing or damaged, please contact HITWAY customer support immediately.
4. Product Overview and Features
The HITWAY BK9 is an electric fat tire mountain bike designed for versatile riding across various terrains. It combines robust construction with advanced electric assistance for an enhanced cycling experience.
4.1. Powerful and Efficient Motor

Equipped with a 250W brushless motor, the BK9 delivers reliable power for various riding conditions. This motor, combined with efficient 7-speed gearing, provides a smooth and responsive ride, capable of handling inclines up to 25 degrees.
4.2. High-Capacity Removable Battery

The bike features a removable 48V 15Ah lithium battery, offering an extended range of 70-150 km on a single charge in assisted mode. The removable design allows for convenient charging both on and off the bike.
4.3. Advanced Suspension System

For enhanced comfort and control, the BK9 is equipped with an adjustable front suspension fork and a central shock absorber. This dual suspension system effectively absorbs impacts and vibrations, providing a smoother ride on uneven terrain.
4.4. Durable Fat Tires

The 26" x 4.0" anti-slip and puncture-resistant fat tires provide superior stability and traction. These tires are designed to perform reliably across diverse environments, including city roads, dirt paths, sand, and snow.
4.5. Smart LCD Display and 7-Speed Gear System

An intuitive LCD display provides real-time information such as speed, distance, and battery level. The 7-speed Shimano gear system allows riders to easily adapt to different gradients and conditions, enhancing climbing capability and overall terrain adaptability.
5. Setup and Assembly
The HITWAY BK9 requires some assembly upon arrival. Please follow these general steps. Refer to the detailed assembly instructions in the included printed manual for specific guidance.
- Unpacking: Carefully remove all components from the packaging. Retain packaging for future transport or returns.
- Handlebar Installation: Attach the handlebars to the stem, ensuring they are centered and tightened securely.
- Front Wheel Installation: Install the front wheel, ensuring the disc brake rotor is correctly aligned with the caliper.
- Pedal Installation: Attach the pedals. Note that pedals are typically marked 'L' for left and 'R' for right and thread in opposite directions.
- Seat Post and Saddle: Insert the seat post with the saddle attached into the frame. Adjust the height for comfortable riding and secure it.
- Battery Installation: Insert the fully charged battery into its compartment and lock it securely.
- Pre-Ride Checks: Before your first ride, check tire pressure, brake function, gear shifting, and ensure all bolts and quick releases are tightened.
6. Operating Instructions
6.1. Powering On/Off and Activation

The HITWAY BK9 offers multiple smart activation methods for convenience and anti-theft security:
- Password: Enter your personalized password on the LCD display to activate the bike.
- NFC Card: Use the provided NFC card by tapping it on the designated area to unlock and start the bike.
- Mobile App: Connect your smartphone via the dedicated HITWAY app to control and activate your bike.
To power on, press and hold the power button on the display. To power off, press and hold the power button again.
6.2. Electric Assist Modes
The bike features three levels of pedal assistance, allowing you to choose the desired power output:
- Level 1 (Eco): Provides minimal assistance for maximum range and light effort.
- Level 2 (Standard): Offers balanced assistance for general riding.
- Level 3 (Sport): Delivers maximum assistance for climbing hills or higher speeds.
Use the '+' and '-' buttons on the handlebar control panel to switch between assistance levels. The maximum assisted speed is 25 km/h.
6.3. Gear Shifting
The 7-speed Shimano gear system allows you to manually adjust your pedaling effort. Use the shifter on the right handlebar to change gears. Shift to lower gears for climbing and higher gears for flat terrain or descents.
6.4. Braking
The bike is equipped with front and rear disc brakes. Apply both brakes simultaneously and smoothly for effective stopping. Avoid sudden, hard braking, especially at high speeds or on loose surfaces.
7. Maintenance
Regular maintenance ensures the longevity and safe operation of your HITWAY BK9.
7.1. Cleaning
Clean your bike regularly with a damp cloth and mild soap. Avoid using high-pressure washers directly on electrical components, bearings, or the motor.
7.2. Battery Care
- Charge the battery fully before the first use and after each ride.
- Do not allow the battery to fully discharge for extended periods.
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- If storing for a long time, charge the battery to 50-70% every 2-3 months.
7.3. Tire Maintenance
Regularly check tire pressure and inflate to the recommended PSI (indicated on the tire sidewall). Inspect tires for wear, cuts, or punctures.
7.4. Brakes and Gears
Periodically check brake pads for wear and replace them when necessary. Ensure brake levers are firm and responsive. Lubricate the chain regularly and check gear shifting for smooth operation.
7.5. Fasteners
Regularly inspect all bolts, nuts, and quick releases to ensure they are properly tightened. Loose components can lead to accidents.
8. Troubleshooting
This section addresses common issues you might encounter with your HITWAY BK9. For more complex problems, please contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Bike does not power on | Battery not charged or not properly installed; loose connections. | Ensure battery is charged and securely installed. Check all electrical connections. |
| Motor not assisting | Assist level set to zero; sensor issue; motor connection. | Increase assist level on the display. Check pedal assist sensor and motor cable connections. |
| Brakes feel spongy or weak | Worn brake pads; air in hydraulic system (if applicable); misaligned caliper. | Inspect and replace brake pads. Adjust brake cable tension. Consult a bike mechanic for hydraulic brake issues. |
| Gears not shifting smoothly | Dirty or unlubricated chain; misaligned derailleur; stretched cable. | Clean and lubricate the chain. Adjust derailleur. If issues persist, a bike shop visit may be required. |
9. Specifications

Dimensions and Weight:
- Product Dimensions: 180 x 65 x 115 cm (70.9 x 25.6 x 45.3 inches)
- Electric Bicycle Weight: 38.7 kg (85.3 lbs)
- Maximum Recommended Load: 120 kg (264.5 lbs)
- Recommended Rider Height: 170-200 cm (67-79 inches)
Performance:
- Motor Power: 250W
- Battery: 48V 15Ah Lithium-ion (768 Watt-hours)
- Range: 70-150 km (43-93 miles) in pedal-assist mode
- Max Assisted Speed: 25 km/h (15.5 mph)
- Assistance Type: Pedal Assist
Components:
- Wheel Size: 26 inches
- Tire Width: 4 inches (Fat Tire)
- Frame Material: Aluminum
- Suspension Type: Dual (Front and Central)
- Number of Speeds: 7 (Shimano)
- Brake Type: Disc Brakes (Front and Rear)
10. Warranty and Support
10.1. Warranty Information
The HITWAY BK9 Electric Fat Tire Mountain Bike comes with a limited warranty. Please refer to the warranty card included in your package or visit the official HITWAY website for detailed terms and conditions regarding coverage, duration, and claims procedures.
10.2. Customer Support
For any questions, technical assistance, or warranty claims, please contact HITWAY customer support. Contact information can typically be found on the official HITWAY website or in your product packaging.







