The Fenix AIR [paid link] rear shock by Fast Suspension is a cutting-edge component designed for road cyclists who demand high performance and adaptability from their suspension systems. With an emphasis on reducing weight while maintaining superior control and comfort, the Fenix AIR [paid link] is crafted for riders seeking both efficiency and smoothness in varied terrain conditions. This guide will cover the installation, adjustment, maintenance, and troubleshooting of the Fenix AIR rear shock, alongside tips for customizing it to enhance your ride.
Installation of Fenix AIR R
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ear Shock
The installation of the Fenix AIR rear shock requires careful attention to detail to ensure optimal performance. Here’s a step-by-step guide:
- Remove the Old Shock:
- If you’re replacing an existing shock, start by removing the rear wheel and the old shock. Use a 5mm Allen wrench [paid link] to detach the shock from the frame and swingarm. Ensure that the frame and swingarm are clean and free from debris before proceeding.
- Prepare the Fenix AIR Rear Shock:
- Check the Fenix AIR shock for any shipping damage. Ensure the shock’s air valve is not damaged, and the shock is in its neutral position before installation.
- If your shock comes with any preload or volume spacers, verify they are properly installed based on the rider’s weight and riding style.
- Install the Shock:
- Align the shock’s eyelets with the frame and swingarm mount points.
- Insert the shock’s mounting bolts and tighten them using a torque wrench [paid link] to the specified torque value (typically 15-20 Nm).
- Reinstall the Rear Wheel:
- After securing the shock, reinstall the rear wheel, ensuring that the axle is tightened according to the manufacturer’s specifications.
- Check for Proper Movement:
- Test the shock’s movement by pressing down on the rear end of the bike. Ensure that the shock is functioning smoothly and that there is no unwanted play or tightness.
Adjustment of Fenix AIR Rear Shock
Once installed, adjusting the Fenix AIR rear shock for optimal performance is crucial. The Fenix AIR offers multiple adjustment points, allowing riders to tailor the suspension settings to their specific needs.
Air Pressure Adjustment
The Fenix AIR features an air-spring system, which means that air pressure plays a critical role in determining the shock’s overall feel and performance. Adjusting the air pressure based on your weight and riding style ensures that the shock can handle different trail conditions effectively.
- Setting the Sag:
- Start by adjusting the air pressure to the manufacturer’s recommended setting, typically between 180-220 PSI for most riders.
- Sit on the bike in your riding position and measure the amount of sag (the distance the shock compresses under your weight). A general rule of thumb is to aim for around 25-30% sag.
- Adjust the air pressure to achieve this target sag. If the sag is too deep, increase the pressure, and if it is too shallow, decrease the pressure.
Rebound Adjustment
Rebound damping controls how quickly the shock returns to its extended position after compression. For smoother rides, a moderate rebound setting is ideal.
- Turn the rebound adjuster counterclockwise to slow down the return or clockwise to speed it up.
- Start with the middle setting and fine-tune according to trail conditions. Faster rebound may be useful on smoother roads, while slower rebound can enhance control on rougher terrain.
Compression Adjustment
The compression setting on the Fenix AIR rear shock helps you adjust how much resistance the shock offers when it is compressed. It is typically adjustable via low-speed and high-speed compression knobs.
- Low-Speed Compression:
- Use the low-speed compression knob to adjust the shock’s response to slow, deep compressions (such as when pedaling or in corners).
- A more open setting (less compression) provides a softer ride, while a firmer setting increases responsiveness.
- High-Speed Compression:
- The high-speed compression knob is intended to regulate the shock’s response to rapid impacts like drops or large bumps.
- Start with a medium setting and adjust based on the severity of the impacts you expect to encounter during your rides.
Maintenance of Fenix AIR Rear Shock
To ensure the longevity and peak [paid link] performance of your Fenix AIR rear shock, regular maintenance is essential. Performing basic maintenance can also help prevent more severe issues and costly repairs.
Cleaning
- Routine Cleaning:
- After every ride, wipe down the shock with a clean, dry cloth to remove dirt, debris, and moisture.
- Pay particular attention to the seals at the ends of the shock to prevent dirt from entering.
- Deep Cleaning:
- Every 6 months, perform a more thorough cleaning. Use a degreaser to clean the shock’s body, followed by lubrication of any moving parts.
Lubrication
- Apply a thin coat of suspension oil to the shock’s air shaft and any pivot points as needed. Lubrication ensures smooth performance and reduces wear over time.
Servicing
- Shock Servicing:
- Depending on your riding frequency, schedule a complete shock service every 12 months or after approximately 100-150 hours of riding. This service typically involves draining and replacing the shock’s oil and servicing the internal seals to maintain air pressure integrity and responsiveness.
Troubleshooting Common Fenix AIR Rear Shock Issues
No Rebound or Slow Rebound
- Cause: This could be due to improper rebound setting or low oil levels.
- Solution: Check the rebound adjuster and increase the setting. If this does not resolve the issue, consider servicing the shock to replace or top up the oil.
Insufficient Shock Travel
- Cause: Insufficient air pressure or incorrect compression settings can cause the shock to feel stiff and limit travel.
- Solution: Adjust the air pressure and check that the compression settings are appropriate for your riding style.
Leaking Air or Oil
- Cause: A leak could be caused by damaged seals or over-pressurization.
- Solution: Inspect the seals for any visible damage and replace them if necessary. If the issue persists, have the shock serviced to check for internal damage.
Customization and Optimization of Fenix AIR Rear Shock
The Fenix AIR offers several customization options that allow you to fine-tune its performance to your preferences.
- Volume Spacers: These can be added or removed to adjust the shock’s progression, allowing for more or less bottom-out resistance. Adding spacers increases the firmness near the end of the shock’s stroke, making it ideal for aggressive riders. Removing spacers gives the shock a more plush feel for smoother rides.
- Spring Rate Adjustment: While the Fenix AIR features an air spring, fine-tuning the spring rate by adjusting air pressure ensures the shock is perfectly suited to your weight, riding style, and terrain.
- Tuning for Terrain: For road cyclists, fine-tuning your shock to handle smoother, long-distance rides is key. Reduce compression damping for more comfort on fast descents or add it for better control over rougher terrain.
Comparison with Similar Models
When comparing the Fenix AIR to other rear shocks in the market, it stands out for its lightweight design and air-spring system. Unlike traditional coil shocks, the Fenix AIR offers easier weight adjustments and better responsiveness, especially for riders who prioritize road cycling performance.
While other models may feature more advanced damping systems or longer travel lengths, the Fenix AIR is perfectly suited for cyclists looking for a balance of comfort and performance on mixed-terrain rides.
Compatibility with Other Drivetrain Components
The Fenix AIR rear shock is designed to be compatible with most modern road bike frames, provided they support rear shock mounts of the correct size. It works seamlessly with a range of drivetrain components from leading brands, such as Shimano and SRAM. However, always verify that your bike’s suspension geometry and shock mount spacing align with the specifications of the Fenix AIR to avoid compatibility issues.