DNM AO-8RC Air Shock Absorber Instruction Manual

1. Introduction

Thank you for choosing the DNM AO-8RC Air Shock Absorber. This manual provides essential information for the proper installation, adjustment, operation, and maintenance of your new shock absorber. Please read it thoroughly before use to ensure optimal performance and safety.

2. Specifications

The DNM AO-8RC is a high-strength aluminum alloy air shock absorber designed for mountain bikes (MTB XC). It features adjustable damping and a three-stage lockout function.

General Specifications:

• Brand: DNM
• Model: AO-8RC
• Origin: Taiwan
• Material: 7075+6061 Aluminum Alloy
• Maximum Air Pressure: 275 PSI

Available Sizes and Weights:

The shock absorber is supplied with a set of bushings. Common bushing sizes include M8*22/24/26/32/42/44/50/54/56mm.

3. Setup and Installation

3.1 Installation

1. Ensure you have the correct shock absorber length and appropriate bushings (e.g., 8x24MM) for your bicycle frame.
2. Carefully remove your old shock absorber.
3. Install the DNM AO-8RC shock absorber using the provided bushings and your bike's hardware. Ensure all bolts are tightened to the manufacturer's recommended torque specifications.

3.2 Air Pressure Adjustment

The air pressure in the shock absorber can be adjusted using a high-pressure pump. The maximum atmospheric pressure is 275 PSI.

1. Locate the air valve mouth on the shock absorber.
2. Attach a high-pressure shock pump to the valve.
3. Inflate or deflate to achieve your desired pressure. Refer to your bike manufacturer's recommendations or personal preference for optimal sag and performance.

3.3 Damping Adjustment

The rebound damping speed can be adjusted to suit different terrains and riding styles.

1. Locate the damping adjustment knob (often red or blue).
2. To increase damping (slower rebound): Rotate the knob in the '+' direction.
3. To decrease damping (faster rebound): Rotate the knob in the '-' direction.

4. Operating the Shock Absorber

The AO-8RC features a three-stage lockout function to adapt to various riding scenarios.

Three-Stage Lockout Switch:

• LOCK: Turns off the shock absorber, making the suspension rigid. Ideal for climbing or smooth surfaces.
• OPEN: Fully opens the shock absorber, allowing for maximum travel and bump absorption. Best for technical descents and rough trails.
• MIDDLE: Provides a half-locked or platform setting, offering a balance between efficiency and comfort. Suitable for undulating terrain or light trail riding.

The shock absorber effectively filters bumps, allowing you to easily navigate various road sections and maintain stability during your ride.

5. Maintenance

Regular maintenance ensures the longevity and optimal performance of your shock absorber.

• Cleaning: After each ride, especially in dirty or wet conditions, clean the shock absorber with mild soap and water. Avoid high-pressure washers directly on seals.
• Inspection: Periodically check for any signs of wear, damage, or leaks around the seals and body.
• Lubrication: Keep the stanchion (the smooth shaft) clean and lightly lubricated with a suspension-specific lubricant.
• Air Pressure Check: Check air pressure regularly (e.g., before every few rides) as air can slowly leak over time.
• Professional Service: For internal service or if you notice significant performance degradation, consult a professional bicycle mechanic.

6. Troubleshooting

Here are some common issues and their potential solutions:

• Loss of Air Pressure: Check the air valve for proper sealing. If air loss is persistent, seals may need inspection or replacement by a professional.
• Poor Damping Performance: Adjust the rebound damping knob. If the issue persists, internal damping components might require service.
• Shock Feels Too Stiff/Soft: Adjust the air pressure using a high-pressure pump to achieve the desired sag and feel.
• Unusual Noises: Inspect mounting bolts for tightness. If noises persist, it could indicate internal wear or damage, requiring professional inspection.

7. User Tips

• Sag Setting: Proper sag (the amount the suspension compresses under your weight) is crucial for performance. Aim for 25-30% sag for trail riding.
• Damping Preference: Experiment with the damping adjustment to find a setting that feels comfortable and controlled for your riding style and terrain. A slower rebound (more damping) is generally preferred for technical terrain, while a faster rebound (less damping) can be better for quick, successive bumps.
• Lockout Use: Utilize the three-stage lockout effectively. Use 'LOCK' for smooth climbs or road sections, 'OPEN' for descents and rough trails, and 'MIDDLE' for varied terrain.
• Compatibility: Always double-check the required shock length and stroke for your specific bike frame before purchasing to ensure compatibility.

8. Warranty and Support

For warranty claims, technical support, or service inquiries, please contact your retailer or the official DNM service center. Keep your proof of purchase for any warranty-related issues.