Introduction
Thank you for choosing the DMASUN Silent Magnetic Resistance Stationary Exercise Bike, Model 8732C. This manual provides essential information for the safe assembly, operation, maintenance, and troubleshooting of your exercise bike. Please read this manual thoroughly before use and retain it for future reference.
Important Safety Instructions
- Consult a physician before starting any exercise program.
- Ensure all parts are securely fastened before each use.
- Place the exercise bike on a flat, stable surface.
- Keep children and pets away from the equipment during operation.
- The maximum user weight capacity for this bike is 350 lbs (158.76 kg). Do not exceed this limit.
- Wear appropriate exercise attire and footwear.
- Stop exercising immediately if you feel faint, dizzy, or experience pain.
- Do not place hands or feet near moving parts.

Image: The DMASUN exercise bike demonstrating its robust construction and 350 lbs load capacity, featuring a 2.0mm thickened frame for stability.
Assembly Instructions
The DMASUN Exercise Bike is designed for quick assembly, with approximately 70% of the unit pre-assembled at the factory. The remaining components can typically be installed within 30 minutes. Necessary tools are included.
Required Components for Assembly:
- Handlebar
- Seat
- Front Stability Tube
- Rear Stability Tube
- Pedals
Assembly Steps:
- Attach the Front and Rear Stability Tubes to the main frame using the provided bolts and washers. Ensure they are securely tightened.
- Install the Seat onto the seat post, then insert the seat post into the main frame. Adjust to your desired height and secure.
- Attach the Handlebar to the handlebar post, then insert the handlebar post into the main frame. Adjust to your desired height and secure.
- Identify the Left (L) and Right (R) pedals. Thread the Left pedal counter-clockwise and the Right pedal clockwise into their respective crank arms. Tighten firmly with a wrench.

Image: The DMASUN exercise bike with its main frame assembled and individual components (handlebar, seat, pedals, stability tubes) ready for final installation, illustrating the ease of assembly.
Operating Instructions
Adjusting Seat and Handlebars
The seat can be adjusted in four ways (up/down, forward/backward) and the handlebars in two ways (up/down) to accommodate users from 4.8 ft to 6.3 ft in height. Loosen the adjustment knobs, move to the desired position, and tighten securely.

Image: The exercise bike highlighting its adjustable seat and handlebar features, suitable for a wide range of user heights.
Adjusting Resistance
The bike features magnetic resistance with a wide adjustable range. Turn the red knob clockwise to increase resistance and counter-clockwise to decrease it. Press the knob down to engage the emergency brake.
- 0-20% Resistance: Suitable for warm-up.
- 20%-50% Resistance: Ideal for running simulations.
- 50%-80% Resistance: Recommended for fat burning.
- 80%-100% Resistance: For muscle strengthening.

Image: The resistance adjustment knob with indicators for various intensity levels and corresponding exercise goals.
Using the Digital Display
The integrated digital display monitors real-time exercise data including time, speed, distance, calories burned, and pulse. To reset the data, press and hold the button for three seconds.

Image: The digital display unit showing real-time exercise metrics and the reset function.
Pedal Usage
The non-slip caged pedals are designed to keep your feet secure during your workout. Ensure your feet are properly placed and the straps are tightened before starting.
Transporting the Bike
The exercise bike is equipped with transport wheels for easy relocation. Tilt the bike forward onto its front wheels and roll it to your desired location.

Image: A user demonstrating how to easily move the exercise bike using its integrated transport wheels.
Maintenance
The DMASUN exercise bike features a magnetic resistance system and a smooth belt drive, requiring minimal maintenance.
- Cleaning: Wipe down the bike regularly with a damp cloth to remove sweat and dust. Avoid abrasive cleaners.
- Inspection: Periodically check all bolts and connections to ensure they remain tight.
- Belt Drive: The rugged ABS pulley ensures smooth belt transmission and is designed for long-term use without breakage or wear. No lubrication is required for the belt drive.

Image: The exercise bike's internal belt drive system, illustrating its smooth and quiet operation, which contributes to low maintenance.
Troubleshooting
If you encounter any issues with your DMASUN exercise bike, please refer to the following common solutions:
- Bike is unstable: Ensure the bike is on a flat surface. Adjust the level adjustment knobs on the stability tubes to compensate for uneven floors.
- Unusual noise during operation: Check all assembled parts, especially the pedals, seat, and handlebars, to ensure they are securely tightened.
- Digital display not working: Check if the 2 AAA batteries are correctly installed and have sufficient charge. Replace if necessary.
- Resistance not changing: Ensure the resistance knob is functioning correctly and is not stuck. If the issue persists, contact customer support.
Specifications
| Feature | Specification |
|---|---|
| Model Number | 8732C |
| Resistance Mechanism | Magnetic |
| Flywheel Weight | 40 lbs (Solid Flywheel) |
| Maximum User Weight | 350 lbs (158.76 kg) |
| Product Dimensions (D x W x H) | 114D x 50W x 114H Centimetres |
| Item Weight | 29 Kilograms |
| Adjustable Resistance Levels | 0-100% (Continuous) |
| Drive System | Belt Drive |
| Display Functions | Time, Speed, Distance, Calories, Pulse |
| Power Source (Display) | 2 AAA batteries (included) |
| Material | Alloy Steel (Thickened) |
| User Height Range | 4.8 ft to 6.3 ft |
Warranty and Customer Support
DMASUN provides a 12-month warranty for this exercise bike. We are committed to optimizing our products and providing professional guidance. If you have any questions or require assistance, please contact DMASUN customer support. Your inquiries will typically be addressed within 18 hours.
For warranty claims or technical support, please refer to the contact information provided with your purchase documentation or visit the official DMASUN website.