1. Introduction
This manual provides essential information for the safe and effective use of your DNM AO-6 Mountain Bike Air Rear Shock. Please read these instructions thoroughly before installation and operation to ensure proper function and longevity of the product. The DNM AO-6 is designed to enhance your riding experience by providing adjustable air suspension for various terrains.
2. Product Overview
The DNM AO-6 Mountain Bike Air Rear Shock is constructed from high-quality AL 6061 aluminum alloy, offering durability and corrosion resistance while maintaining a lightweight profile. It features adjustable air pressure, allowing riders to customize the shock's firmness to suit their weight and riding style. This shock absorber is suitable for mountain bikes, MTBs, folding bikes, and scooters.
Image 2.1: The DNM AO-6 Mountain Bike Air Rear Shock, showcasing its compact design and adjustable air valve.
Key Features:
- Material: High-quality AL 6061 aluminum alloy for wear and corrosion resistance.
- Adjustable Air Pressure: Main air pressure can be adjusted up to 250 PSI for customized damping.
- Versatile Application: Suitable for mountain bikes, MTBs, folding bikes, and scooters.
- Effective Shock Absorption: Designed to reduce bumps and vibrations for a smoother ride.
Image 2.2: Visual representation of key features including damping, easy adjustment, aluminum alloy construction, and lightweight design. Also includes a table of various shock lengths, travel, and weights.
Image 2.3: Close-up view highlighting the AL-6061 aluminum alloy construction, emphasizing its strength and corrosion resistance.
3. Specifications
| Feature | Detail |
|---|---|
| Model Number | AO6-150 mm x 31 mm |
| Manufacturer | DNM |
| Material | AL 6061 Aluminum Alloy |
| Eye to Eye Length | 150 mm (5.90 inches) |
| Travel | 31 mm (1.22 inches) |
| Sleeve Dimensions | 8 mm x 24 mm |
| Maximum Air Pressure | 250 PSI |
| Vehicle Service Type | Bike, MTB, Mountain Bike, E-Bike, Scooter |
Image 3.1: Diagram illustrating the dimensions of various DNM AO-6 shock models, including eye-to-eye length and travel, with the 150mm x 31mm model highlighted.
4. What's in the Box
Upon opening the package, please verify that all components are present:
- 1 x DNM AO-6 Air Rear Shock
- 2 x Sleeve Dimensions (8mm x 24mm)
5. Installation
Proper installation is crucial for the performance and safety of your rear shock. If you are unsure about any step, consult a professional bicycle mechanic.
- Compatibility Check: Before installation, confirm that the shock's eye-to-eye length (150mm) and sleeve dimensions (8mm x 24mm) are compatible with your bicycle frame. Refer to your bicycle manufacturer's specifications.
- Remove Old Shock: Carefully remove the existing rear shock from your bicycle. Support the bicycle securely during this process.
- Install New Shock: Insert the DNM AO-6 Air Rear Shock into the designated mounting points on your bicycle frame. Use the provided sleeve dimensions (8mm x 24mm) as needed.
- Secure Fasteners: Tighten all mounting bolts to the torque specifications recommended by your bicycle manufacturer. Do not overtighten.
- Initial Air Pressure: The shock may come with some pre-loaded air pressure. It is recommended to adjust the air pressure to your specific weight and riding preferences after installation.
Note: Ensure the air valve is positioned for easy access for future adjustments.
6. Air Pressure Adjustment
The DNM AO-6 allows for adjustable air pressure to control the shock's firmness (softness and hardness). This adjustment is critical for optimal performance and rider comfort.
- Required Tool: Use a high-pressure shock pump with a pressure gauge for accurate adjustments. Do not use a standard tire pump.
- Increasing Pressure (Harder Ride): To make the shock firmer, connect the shock pump to the air valve (American air mouth) and slowly add air. The maximum recommended air pressure is 250 PSI.
- Decreasing Pressure (Softer Ride): To make the shock softer, carefully release air from the valve using the pump's bleed button or by gently depressing the valve core.
- Setting Sag: Sag is the amount the suspension compresses under the rider's weight.
- Sit on your bike in your normal riding position (with all your gear).
- Have someone measure the eye-to-eye length of the shock, or measure the exposed shaft length, then compare it to the fully extended length.
- Adjust air pressure until you achieve the desired sag, typically 20-30% of the shock's total travel (e.g., for 31mm travel, 6-9mm sag).
- Test Ride: After adjusting, perform a short test ride to evaluate the feel and make further fine-tune adjustments as necessary.
Image 6.1: Illustration showing the air valve and how adjusting air pressure in the chamber affects the shock's softness or hardness.
Image 6.2: Close-up details of the shock, including the American-style air valve and replaceable bushings.
Image 6.3: Graph demonstrating the reduction in tire vibration amplitude when the DNM shock absorber is used, compared to no shock absorber.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your DNM AO-6 rear shock.
- Cleanliness: Keep the shock body and shaft clean from dirt and debris. Wipe down with a soft, damp cloth after each ride, especially in muddy or dusty conditions.
- Check Air Pressure: Periodically check the air pressure with a shock pump, as air pressure can fluctuate over time. Adjust as needed to maintain your preferred sag.
- Inspect for Damage: Regularly inspect the shock for any signs of damage, leaks, or wear on the seals and bushings.
- Bushing Replacement: The bushings (8mm x 24mm) are replaceable. If you notice excessive play or noise, consider replacing them.
- Professional Service: For internal service or complex repairs, it is recommended to seek assistance from a qualified bicycle service center.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Shock feels too soft / Bottoming out easily | Insufficient air pressure. | Increase air pressure using a shock pump. Refer to Section 6. |
| Shock feels too hard / No travel | Excessive air pressure. | Release air pressure using a shock pump. Refer to Section 6. |
| Air pressure drops quickly | Leaking air valve or seals. | Check valve core for tightness. Inspect seals for damage. If problem persists, seek professional service. |
| Unusual noises (creaking, knocking) | Loose mounting bolts, worn bushings, or internal issue. | Check and tighten mounting bolts to specified torque. Inspect and replace worn bushings. If noise continues, professional inspection is recommended. |
9. Warranty and Support
The DNM AO-6 Mountain Bike Air Rear Shock comes with a 1-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
The warranty does not cover:
- Damage caused by improper installation, misuse, neglect, or accidents.
- Normal wear and tear of components such as seals and bushings.
- Modifications or repairs performed by unauthorized personnel.
For warranty claims or technical support, please contact the retailer where you purchased the product or the manufacturer directly. Keep your proof of purchase for warranty validation.