1. Introduction
Thank you for choosing the EYESUN Stationary Exercise Bike Cycling Bike 630W. This manual provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your new exercise bike. Please read this manual thoroughly before use and retain it for future reference.
2. Safety Information
To ensure your safety and prolong the life of your exercise bike, please observe the following precautions:
- Consult a physician before starting any new exercise program.
- Place the exercise bike on a flat, stable surface. Ensure adequate clearance around the bike (at least 0.6 meters or 2 feet).
- Keep children and pets away from the equipment during operation.
- Inspect the bike for loose or damaged parts before each use. Do not use if any components are compromised.
- Wear appropriate athletic footwear and clothing. Avoid loose clothing that could get caught in moving parts.
- Do not exceed the maximum weight capacity of 330 lbs (150 kg).
- Use the emergency brake to stop the flywheel instantly if needed.
- Adjust the seat and handlebars to a comfortable and safe position before beginning your workout.
3. Package Contents
Carefully unpack all components and verify that you have received all items listed below. If any parts are missing or damaged, please contact customer support.
- Main Frame Assembly
- Front Stabilizer
- Rear Stabilizer
- Pedals (Left and Right)
- Seat Post and Seat
- Handlebar Post and Handlebar
- LCD Monitor
- Hardware Kit (bolts, washers, nuts, tools)
- User Manual

Image 3.1: Overview of the EYESUN Stationary Exercise Bike 630W. The image displays the complete exercise bike with its main components, including the frame, flywheel, seat, handlebars, and LCD monitor.
4. Assembly Instructions
The EYESUN Cycling Bike 630W is designed for straightforward assembly. Most of the main frame is pre-assembled. Please follow these steps carefully.

Image 4.1: The exercise bike arrives largely pre-assembled, simplifying the setup process. Key components like the main frame are already connected, requiring fewer steps for completion.
Step-by-Step Assembly:
- Attach Stabilizers: Secure the front and rear stabilizers to the main frame using the provided bolts and washers. Ensure they are tightened firmly for stability.
- Install Pedals: Identify the left (L) and right (R) pedals. The left pedal tightens counter-clockwise, and the right pedal tightens clockwise. Thread them into the crank arms and tighten securely.
- Mount Seat Post and Seat: Insert the seat post into the main frame and adjust to your desired height. Secure with the adjustment knob. Attach the seat to the seat post.
- Install Handlebar Post and Handlebar: Insert the handlebar post into the main frame and adjust its height. Attach the handlebar to the post and secure it.
- Connect LCD Monitor: Attach the LCD monitor to the handlebar assembly. Connect the sensor cable from the main frame to the back of the monitor. Ensure the sensor cable is inserted vertically and perpendicularly to the flywheel for correct data tracking.

Image 4.2: Proper connection of the app sensor cable to the LCD monitor. The image illustrates the correct vertical insertion of the sensor cable to ensure accurate data tracking.
5. Operating Instructions
Resistance Adjustment
The EYESUN Cycling Bike 630W features an adjustable brake pad resistance system. The resistance knob is located conveniently on the main frame.
- Increase Resistance: Turn the resistance knob clockwise to increase the intensity of your workout.
- Decrease Resistance: Turn the resistance knob counter-clockwise to reduce the intensity.
- Emergency Stop: Press down firmly on the resistance knob to engage the emergency brake and stop the flywheel instantly.

Image 5.1: The resistance knob allows for quick adjustment of workout intensity and serves as an emergency stop mechanism. Turning clockwise increases resistance, counter-clockwise decreases it, and pressing down stops the flywheel.
LCD Monitor Functions
The integrated LCD monitor tracks your workout data:
- Time: Duration of your workout.
- Speed: Current cycling speed.
- Distance: Distance covered during the current session.
- Calories: Estimated calories burned.
- Odometer: Total accumulated distance.
The monitor typically cycles through these metrics automatically. Refer to the monitor's specific instructions for detailed operation and battery replacement.
6. Adjustments
Proper adjustment of the seat and handlebars is crucial for comfort and effective workouts.
Seat Adjustment
- Height Adjustment (5-way): Loosen the adjustment knob on the seat post. Raise or lower the seat until your leg has a slight bend at the knee when the pedal is at its lowest point. Tighten the knob securely.
- Forward/Backward Adjustment: Loosen the knob beneath the seat. Slide the seat forward or backward to find a comfortable position relative to the handlebars. Tighten the knob securely.
Handlebar Adjustment
- Height Adjustment (3-way): Loosen the adjustment knob on the handlebar post. Raise or lower the handlebars to a comfortable height that allows for a relaxed upper body posture. Tighten the knob securely.

Image 6.1: The exercise bike offers 5-way seat adjustment (up/down, forward/back) and 3-way handlebar adjustment (up/down) to accommodate various user heights and preferences, ensuring a comfortable and ergonomic riding position.
7. Smart Tracking & App Integration
Your EYESUN Cycling Bike 630W features Bluetooth connectivity, allowing you to connect to various fitness applications for enhanced workout tracking and entertainment.
- Bluetooth Connectivity: The bike can connect to compatible fitness apps such as FantomFite, KINOMAP, and Zwift.
- Data Sync: Supports syncing workout data with Google Fit and Apple Health.
- Tablet Holder: Use the built-in tablet holder to enjoy music or videos during your ride.

Image 7.1: The LCD monitor displays key workout metrics, while the bike's Bluetooth connectivity allows integration with popular fitness applications like Zwift and Kinomap for interactive training sessions.
8. Maintenance
Regular maintenance ensures the longevity and optimal performance of your exercise bike.
- Cleaning: Wipe down the bike with a damp cloth after each use to remove sweat and dust. Avoid abrasive cleaners.
- Lubrication: Periodically check the belt drive system. While generally maintenance-free, ensure no debris interferes with its operation.
- Inspection: Regularly inspect all bolts, nuts, and moving parts for tightness and wear. Tighten any loose fasteners. Check pedals, seat, and handlebar for secure attachment.
- Brake Pad: Monitor the brake pad for wear. If resistance becomes inconsistent or noise increases, the brake pad may need replacement. Contact customer support for assistance.

Image 8.1: The EYESUN bike features a smooth belt drive for quiet operation and a stable U-shaped bottom for enhanced safety during workouts. Regular inspection of these components is recommended.
9. Troubleshooting
Refer to the table below for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Bike is unstable or wobbles | Uneven surface; loose stabilizers | Ensure bike is on a flat surface. Tighten all bolts on the front and rear stabilizers. |
| Squeaking or grinding noise | Loose parts; worn brake pad; debris in flywheel | Check and tighten all bolts. Inspect the brake pad for wear. Clean any debris from the flywheel area. |
| LCD monitor not displaying data | Loose sensor cable; dead batteries; incorrect sensor orientation | Check if the sensor cable is securely connected. Replace batteries in the monitor. Ensure the sensor cable is inserted vertically and perpendicularly to the flywheel. |
| Resistance not changing | Resistance knob mechanism issue; worn brake pad | Inspect the resistance knob and brake pad. Contact customer support if the issue persists. |
10. Specifications
| Feature | Detail |
|---|---|
| Model Number | Cycling Bike 630W |
| Product Dimensions | 98.04 x 59.94 x 100.84 cm (38.6 x 23.6 x 39.7 inches) |
| Item Weight | 20 kg (44.1 lbs) |
| Maximum Weight Capacity | 330 lbs (150 kg) |
| Drive System | Belt Drive |
| Resistance Mechanism | Friction |
| Material | Alloy Steel |
| Adjustable Seat | 5-way (Height & Forward/Backward) |
| Adjustable Handlebar | 3-way (Height) |
| Special Features | LCD Display, Phone Holder, Transport Wheels, Water Bottle Holder |
| Power Source | Manual |
11. Warranty & Support
EYESUN provides a 24-month worry-free warranty for your exercise bike. For any questions, concerns, or warranty claims, please contact our customer service team.
- Email Support: support@eyesun.net (24/7 support available)
- Warranty Activation: Visit eyesun.net/warranty to activate your extended warranty.




