1. Introduction
Thank you for choosing the DMASUN Professional Exercise Bike. This manual provides essential information for the safe assembly, operation, and maintenance of your new fitness equipment. Please read this manual thoroughly before use and retain it for future reference.
2. Safety Information
- Consult a physician before starting any exercise program.
- Ensure all bolts and nuts are securely tightened before each use.
- Keep children and pets away from the exercise bike during operation.
- Place the bike on a flat, stable surface with adequate clearance around it.
- Wear appropriate exercise attire and footwear.
- Stop exercising immediately if you feel faint, dizzy, or experience pain.
- The maximum user weight capacity for this bike is 350 lbs (160 kg).
- The maximum recommended user height is 193 cm (6.3 ft).
3. Package Contents
Your DMASUN Professional Exercise Bike package includes the following components. Please verify all parts are present before beginning assembly.
- Main Frame (pre-assembled with flywheel and crank)
- Handlebar Assembly
- Seat Post and Seat
- Front Stabilizer Bar
- Rear Stabilizer Bar
- Left Pedal
- Right Pedal
- LCD Display Console
- Tablet Holder
- Water Bottle Holder
- Additional Silicone Seat Cushion Cover
- Hardware Kit (bolts, washers, tools)
- User Manual
4. Component Identification
Familiarize yourself with the various parts of your exercise bike.

Image: The DMASUN Professional Exercise Bike, showcasing its main components including the frame, flywheel, pedals, seat, handlebars, and LCD display console.
- LCD Display Console: Shows time, speed, distance, calories, and pulse.
- Handlebar: Adjustable for height and position.
- Resistance Knob/Emergency Brake: Adjusts resistance from 0-100 and acts as an emergency stop.
- Seat: Ergonomically designed, adjustable horizontally and vertically.
- Seat Post: Supports the seat, allows for vertical adjustment.
- Pedals: Non-slip caged design for secure foot placement.
- Flywheel: Provides smooth and consistent resistance.
- Stabilizer Bars: Front and rear bars with non-slip foot covers for stability.
- Transport Wheels: Located on the front stabilizer for easy relocation.
- Tablet Holder: Integrated into the handlebar assembly.
- Water Bottle Holder: Conveniently located on the frame.
5. Assembly Instructions
The DMASUN Professional Exercise Bike is designed for quick assembly, with approximately 70% of the components pre-assembled at the factory. The remaining installation can typically be completed within 30 minutes.
Required Tools:
- Tools provided in the hardware kit.
Assembly Steps:
- Attach Stabilizer Bars: Secure the front and rear stabilizer bars to the main frame using the provided bolts and washers. Ensure they are firmly tightened for stability.
- Install Pedals: Identify the Left (L) and Right (R) pedals. The left pedal screws counter-clockwise, and the right pedal screws clockwise. Thread them carefully into the crank arms and tighten securely.
- Mount Seat: Insert the seat post into the main frame. Adjust the height to your preference and secure it with the adjustment knob. Attach the seat to the seat post.
- Install Handlebar: Insert the handlebar post into the main frame. Adjust the height and position, then secure it with the adjustment knob. Attach the LCD display console to the handlebar assembly, connecting any necessary cables.
- Attach Accessories: Install the water bottle holder and tablet holder as indicated in the diagrams (if not pre-attached).
- Final Check: Review all connections and ensure all bolts are tight before first use.
6. Operation
6.1 Adjustments
- Seat Adjustment: The seat can be adjusted in four ways (up/down, forward/backward) to accommodate users from 4.6 ft to 6.3 ft in height. Loosen the adjustment knobs, slide the seat to the desired position, and tighten securely.
- Handlebar Adjustment: The handlebar can be adjusted in two ways (up/down) to suit your riding posture. Loosen the adjustment knob, move the handlebar to the desired height, and tighten firmly.
- Resistance Adjustment: The resistance knob allows for infinitely variable resistance from 0% (lightest) to 100% (heaviest). Turn the knob clockwise to increase resistance and counter-clockwise to decrease it.
- Emergency Brake: Press the resistance knob down firmly to engage the emergency brake and stop the flywheel immediately.
6.2 LCD Display Console
The LCD display provides real-time exercise data:
- Time: Duration of your workout.
- Speed: Current cycling speed.
- Distance: Total distance covered during the workout.
- Calories: Estimated calories burned.
- Pulse: Heart rate (if pulse sensors are used, typically on handlebars).
To reset the exercise data, press and hold the display button for three seconds.
7. Maintenance
- Cleaning: Wipe down the bike with a damp cloth after each use to remove sweat and dust. Avoid abrasive cleaners.
- Inspection: Regularly check all bolts, nuts, and moving parts for tightness and wear. Tighten any loose components.
- Lubrication: The belt drive system is generally maintenance-free. Consult customer support if you notice any unusual noises.
- Storage: Store the bike in a dry, cool place away from direct sunlight and extreme temperatures.
8. Troubleshooting
- Bike is unstable: Ensure the bike is on a flat surface. Adjust the level adjustment knobs on the stabilizer bars to compensate for uneven floors. Check that all stabilizer bar bolts are tight.
- Unusual noise during operation: Check all visible bolts and connections for tightness. Ensure pedals are securely fastened. If noise persists, contact customer support.
- LCD display not working: Check battery installation and ensure cables are properly connected. Replace batteries if necessary.
- Resistance not changing: Verify the resistance knob is functioning correctly. Ensure no obstructions are interfering with the resistance mechanism.
9. Specifications
| Model | 8715A |
| Brand | DMASUN |
| Material | Aluminum (3.0mm thickness) |
| Product Dimensions (L x W x H) | 120 x 52 x 114 cm |
| Product Weight | 30 kg |
| Maximum User Weight | 350 lbs (160 kg) |
| Maximum User Height | 193 cm (6.3 ft) |
| Resistance Mechanism | Adjustable (0-100 levels) |
| Display Functions | Time, Speed, Distance, Calories, Pulse |
| UPC | 737970305711 |
10. Warranty and Support
DMASUN provides a 3-year warranty for this Professional Exercise Bike. If you encounter any issues or have questions regarding assembly, operation, or maintenance, please contact DMASUN customer support. Our factory engineers are available to provide professional guidance and assistance. Your inquiries will typically be addressed within 16 hours.
For support, please refer to the contact information provided on the DMASUN official website or your purchase documentation.


