Maintaining your Fenix AIR [paid link] rear shock from Fast Suspension is essential to ensure its optimal performance and longevity. With proper care and maintenance, you can avoid expensive repairs and keep your bike running smoothly for years. In this guide, we will provide step-by-step instructions on how to install, adjust, maintain, and troubleshoot the Fenix AIR [paid link] rear shock. We will also explore how to customize the shock to suit your riding style and compare it with similar models to help you make the best choice.
Tools Required
- 5mm Allen wrench [paid link]
- 6mm Allen wrench [paid link]
- Torque wrench [paid link] (recommended for accurate tightening)
- Clean rag or towel
- Suspension grease
- Shock pump (compatible with the Fenix AIR)
- Small brush (optional for cleaning)
- Threadlocker (optional)
Installation of the Fenix AIR Rear Shock
Installing the Fenix AIR rear shock requires basic mechanical skills, but it’s crucial to follow the steps carefully to ensure a secure and functional setup.
- Remove the Old Shock (if replacing)
Use a 5mm Allen wrench to remove the bolts securing the shock to the frame. Keep the bolts in a safe place if you plan to reuse them. Clean the mounting areas on both the frame and the shock before installation. - Grease the Shock Mounts
Apply a small amount of suspension grease to the shock mounts. This will reduce wear and tear on the mounting hardware and ensure smooth suspension movement. - Install the New Shock
Position the Fenix AIR rear shock into the mounting points on the frame. Align the shock eyelets with the frame’s mounts and insert the bolts. Tighten the bolts evenly with a 6mm Allen wrench to the manufacturer’s specified torque setting. Avoid over-tightening, as this can damage the shock or frame. - Set the Sag
Use the shock pump to adjust the air pressure in the shock. Set the sag (the amount the shock compresses under rider weight) according to the manufacturer’s recommendations. This is usually around 25-30% of the shock’s total travel. Check the sag by sitting on the bike and observing the shock’s compression.
Adjusting the Fenix AIR Rear Shock
The Fenix AIR rear shock offers multiple adjustability options to fine-tune your ride. Adjusting the shock correctly ensures that you get the best performance based on your weight, riding style, and terrain.
1. Air Pressure
The air pressure in the Fenix AIR rear shock directly affects its performance. For the best ride quality, set the air pressure based on your weight and riding style. Start with the recommended pressure, then adjust in small increments based on feedback from your ride. Keep in mind that a higher pressure offers firmer support, while a lower pressure provides more plushness.
2. Rebound Damping
The rebound damping controls how quickly the shock extends after compression. To adjust this, turn the rebound knob located on the shock body. Turn it clockwise to slow the rebound (good for fast, aggressive riding) or counterclockwise to increase rebound speed (better for smoother terrain). It’s important to find a balance where the shock returns quickly enough to avoid any excessive bounce, but not so fast that it causes instability.
3. Compression Damping
The compression damping adjusts how the shock responds to compression forces. If you frequently ride on rough terrain, increasing the compression damping will help absorb impacts more effectively. On the other hand, if you prefer a softer ride, reduce the compression damping. Adjusting the compression allows the shock to better absorb bumps and improve comfort.
Maintenance of the Fenix AIR Rear Shock
Regular maintenance is vital to ensure that your Fenix AIR rear shock continues to perform at its best.
1. Clean the Shock
Dirt and debris can quickly build up on your shock, leading to wear and performance degradation. After each ride, wipe down the shock with a clean rag to remove any dirt or grime. If you ride in muddy or dusty conditions, use a small brush to clean hard-to-reach areas.
2. Lubricate the Mounts
Grease the shock mounts periodically to prevent corrosion and reduce friction. This will ensure smooth movement and prolong the lifespan of the shock.
3. Check for Leaks
Inspect the shock for any signs of air or oil leaks. If you notice any leakage, it could be an indication of an internal issue. In this case, it is recommended to contact Fast Suspension for professional servicing.
4. Service the Shock
Over time, the internal oil and seals can wear out. For regular performance, it is recommended to service the shock every 12-18 months, or after every 100-150 hours of riding. During a service, the shock is disassembled, cleaned, and the internal components (such as seals and oil) are replaced.
Troubleshooting Common Fenix AIR Rear Shock Issues
Sometimes, your shock may experience issues that can affect your ride quality. Here are some common problems and solutions.
1. Shock Not Holding Air
If the shock is losing air pressure, first check the valve for any signs of damage. If the valve is fine, the issue could lie with the internal seals. In this case, it is best to have the shock serviced by a professional.
2. Excessive Rebound or Slow Rebound
If the shock rebounds too quickly or too slowly, adjust the rebound damping knob. If the problem persists despite adjustments, there could be an issue with the internal damper, requiring a service.
3. Shock Bottoming Out
If the shock frequently bottoms out during heavy impacts, check the air pressure. You may need to increase the pressure slightly to provide more support. Alternatively, adjusting the compression damping may also help prevent bottoming out.
Customization and Optimization of the Fenix AIR Rear Shock
To optimize the Fenix AIR rear shock for your riding style, consider these adjustments:
- Air Pressure: Fine-tune the air pressure for your specific riding weight and style. Lighter riders will need less air pressure, while heavier riders may need more.
- Rebound Damping: If you’re a downhill rider, slower rebound damping will help maintain control on rough terrain. If you’re riding cross-country or trail, faster rebound settings may offer better handling.
- Compression Damping: For aggressive riding, increasing compression damping will help absorb harder impacts. For smoother, cross-country terrain, softer compression settings may offer more comfort.
Comparison with Similar Models
The Fenix AIR rear shock is often compared to other models from brands like Fox and RockShox. Here’s a comparison of key features:
- Weight: The Fenix AIR is known for being lightweight, which is beneficial for racers and riders looking to save weight. In comparison, Fox’s Float X and RockShox Super Deluxe are slightly heavier.
- Adjustability: The Fenix AIR offers multiple adjustment options for air pressure, rebound, and compression. Similar models like the Fox Float X also offer these adjustments but at a higher price point.
- Performance: The Fenix AIR excels in smoothness and responsiveness, particularly on rough terrains, while models from Fox and RockShox may offer more high-end features like additional compression adjustments or more advanced dampening systems.
Understanding Compatibility with Other Drivetrain Components
The Fenix AIR rear shock is designed to be compatible with a wide range of mountain bike setups. It pairs well with standard 150mm and 160mm travel bikes, and the shock can be used in conjunction with a variety of drivetrain components, including Shimano and SRAM drivetrains. However, always check with Fast Suspension or your bike shop to ensure compatibility with your specific frame.