The Fenix AIR [paid link] rear shock from Fast Suspension is a premium choice for serious cyclists who seek outstanding performance, adjustability, and durability. Whether you’re tackling aggressive trail riding or endurance events, the Fenix AIR [paid link] stands out due to its precise tuning options, lightweight design, and advanced suspension technology. This guide explores why the Fenix AIR is an ideal choice, how to install and maintain it, and what sets it apart from similar models.

Installation of the Fenix A

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IR Rear Shock

Installing the Fenix AIR rear shock on your bike is a straightforward process if done with care and attention to detail. Follow these steps to ensure proper installation.

Tools Required:

• Torque wrench [paid link]
• Allen wrenches [paid link] (specific size as per shock mount)
• Shock pump
• Grease (optional for mounting hardware)
• Soft cloth or towel

Step-by-Step Installation:

1. Prepare the Bike: Place your bike on a stable work stand. Ensure that the area around the shock mounting points is clean and free of debris.
2. Remove the Old Shock (if applicable): If you are replacing an old shock, use the correct Allen wrenches [paid link] to loosen and remove the mounting bolts at both the top and bottom of the shock.
3. Apply Grease: Apply a thin layer of grease to the shock mounting hardware to ensure smooth operation and prevent squeaks.
4. Install the Fenix AIR Shock: Position the Fenix AIR shock on the rear triangle of the frame, aligning the mounting hardware. Ensure that the shock is positioned correctly for optimal performance.
5. Secure the Mounting Bolts: Tighten the top and bottom mounting bolts using a torque wrench [paid link] to the manufacturer’s recommended torque setting (usually found in the shock manual).
6. Check for Proper Alignment: Ensure the shock is aligned properly and that no parts are misaligned or rubbing against other components.
7. Set the Air Pressure: Using a shock pump, adjust the air pressure in the Fenix AIR rear shock according to your weight and riding style, as per the recommended settings.

Adjustment and Fine-Tuning

The Fenix AIR rear shock is designed for high levels of customization. Proper adjustment of its settings is crucial for achieving the best performance for your riding style and terrain.

Key Adjustment Features:

1. Rebound Damping: The rebound damping controls how quickly the shock returns to its original position after compression. Adjusting this ensures the shock responds optimally to terrain changes. For smoother terrain, set it to a quicker rebound. For rougher, rockier terrain, use slower rebound settings.
2. Compression Damping: Adjust the compression damping to suit your riding style. Higher compression settings are ideal for aggressive riding, as they offer more resistance during compression, while lower compression settings allow for a smoother ride on less aggressive trails.
3. Air Pressure: As with most rear shocks, the air pressure affects the shock’s performance. Higher air pressure increases the shock’s firmness, while lower pressure results in a softer ride. Adjust air pressure based on your weight and riding conditions.
4. Volume Spacers: The Fenix AIR rear shock includes volume spacers that can be added or removed to modify the shock’s progression during compression. Removing spacers will create a more linear feel, while adding them increases bottom-out resistance for a more controlled ride.

Maintenance of the Fenix AIR Rear Shock

Regular maintenance is essential to keep the Fenix AIR rear shock performing at its peak [paid link]. Proper care not only ensures longevity but also optimal functionality in all riding conditions.

Cleaning and Lubing:

• After Each Ride: Wipe down the shock with a soft cloth to remove dirt, dust, and debris. Be sure to clean the mounting hardware as well.
• Lubrication: Apply a small amount of lubrication to the shock’s pivot points and mounting hardware to maintain smooth movement and prevent rust.

Inspection and Servicing:

• Visual Inspection: Periodically check the shock for any signs of wear, damage, or leakage. If you notice oil stains around the seals, it could indicate a problem with the internal oil system.
• Seal Maintenance: Inspect the seals regularly. If they are damaged or worn, they should be replaced to prevent dirt from entering the shock, which could affect its performance.
• Air Pressure Checks: Over time, air pressure can drop. Use a shock pump to regularly check and adjust the air pressure to keep the shock within the recommended range.

When to Service:

• The Fenix AIR rear shock should be fully serviced after a certain number of hours of riding (usually 200-300 hours, depending on the usage intensity). Professional servicing will involve disassembling the shock, inspecting internal components, and replacing any parts that have worn out.

Troubleshooting Common Issues

Even the best suspension systems can encounter problems. Here are some common issues and solutions for the Fenix AIR rear shock.

1. Unresponsive Shock or Lack of Travel:

• Cause: This could be due to low air pressure or incorrect air spring settings.
• Solution: Check and adjust the air pressure according to the rider’s weight and riding style. If travel is still restricted, inspect the shock for possible internal damage.

2. Squeaky Shock:

• Cause: A squeaky shock is often due to improper mounting or a lack of lubrication in the pivot points.
• Solution: Check the shock mounts for proper tightness and apply lubrication to the contact points.

3. Leaking Oil:

• Cause: Oil leakage is typically a sign of seal failure.
• Solution: Inspect the seals and replace them if necessary. This may require professional service if the shock is still under warranty.

4. Overly Harsh Ride:

• Cause: A harsh ride could be due to too high air pressure or a stiff compression setting.
• Solution: Lower the air pressure and adjust the compression settings to soften the ride.

Customization and Optimization

The Fenix AIR rear shock offers ample opportunities for customization to match different riding styles and terrain preferences.

Customization Options:

• Shock Size: Ensure the shock size is compatible with your bike frame and suspension design. The Fenix AIR comes in a variety of sizes, allowing for a tailored fit to your bike.
• Spring Rate: While the Fenix AIR uses an air spring system, the ability to fine-tune its pressure allows riders to adjust the spring rate without switching out coils.
• Tuning Dials: With multiple adjustment knobs for compression, rebound, and air pressure, the Fenix AIR allows for extensive customization. Riders can easily adjust settings on the go to match varying trail conditions, ensuring maximum control and comfort.

Comparison with Similar Models

When comparing the Fenix AIR rear shock with other similar shocks on the market, several key aspects set it apart.

• Performance: The Fenix AIR offers superior performance, particularly in aggressive or technical terrain, with a focus on tunability and responsiveness.
• Weight: The Fenix AIR is designed with lightweight materials, making it an excellent choice for cyclists who prioritize weight savings while maintaining robust suspension performance.
• Price: While it is on the higher end of the price spectrum, the Fenix AIR justifies its cost with a premium build quality and performance enhancements that appeal to serious riders.

Compatibility with Other Drivetrain Components

The Fenix AIR rear shock is designed to work seamlessly with a variety of bike frames, especially those in the mid-to-high-end spectrum. It is compatible with most modern full-suspension frames, particularly those with a focus on cross-country, trail, and enduro riding. However, it is important to ensure the correct shock size and mounting system for your bike, as compatibility may vary depending on the frame’s design.

Mounting Standards:

The Fenix AIR supports both eyelet and trunnion mounts, making it versatile [paid link] for different frame types. Check your frame’s specifications to ensure compatibility with the shock’s mounting system.