Why Riders Trust the Fenix COIL Rear Shock

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The Fenix COIL [paid link] Rear Shock from Fast Suspension has earned a solid reputation in the world of mountain biking due to its advanced design and reliable performance. Trusted by riders for its durability and adjustability, this rear shock is designed to handle the toughest trails and conditions. This guide covers everything you need to know about the Fenix COIL [paid link] Rear Shock, including installation, maintenance, troubleshooting, and optimization tips to ensure you get the most out of your ride.

Key Features of the Fenix

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COIL Rear Shock

The Fenix COIL Rear Shock is specifically designed for riders who demand high performance, durability, and adjustability. Below are its standout features:

  • Coil Spring System: The shock uses a coil spring, which provides a more consistent feel and is less prone to fading during long rides, compared to air shocks.
  • External Rebound and Compression Damping Adjustments: These features allow riders to fine-tune the shock to suit their riding style and terrain.
  • Durability: Built with top-quality materials to withstand extreme riding conditions, the Fenix COIL is known for its long-lasting performance.
  • Heat Dissipation: A unique feature of the Fenix COIL is its ability to dissipate heat effectively, ensuring it performs optimally even during extended descents.

Tools Required

  • 8mm Allen wrench [paid link]
  • 10mm socket wrench
  • Torque wrench [paid link]
  • Suspension oil (as recommended by the manufacturer)
  • Bike stand [paid link] (optional but recommended)

Installation of the Fenix COIL Rear Shock

Installing the Fenix COIL Rear Shock is straightforward, but it requires precision to ensure optimal performance. Follow these steps carefully:

  1. Remove the Old Shock: Use a 10mm socket wrench to remove the bolts securing the old shock in place.
  2. Prepare the New Fenix COIL Shock: Check the shock for any shipping damage and ensure all mounting hardware is included.
  3. Align the Shock: Position the Fenix COIL shock into the shock mount on the frame. Be sure that the shock’s eyelets align perfectly with the mounting points on both the top and bottom of the frame.
  4. Insert the Bolts: Use an 8mm Allen wrench [paid link] to tighten the bolts. Ensure they are torqued to the recommended settings, typically around 20-25Nm (check the manufacturer’s manual for exact specifications).
  5. Check for Movement: Move the shock through its full travel to ensure there’s no binding. If there is resistance or noise, check the mounting hardware for proper alignment.

Adjusting the Fenix COIL Rear Shock

The Fenix COIL Rear Shock offers a range of adjustability, allowing riders to tailor the performance of the shock to their needs. The two main adjustments are compression and rebound damping.

Compression Damping

Compression damping controls how quickly the shock compresses when you hit obstacles like rocks or roots. To adjust:

  1. Locate the Compression Knob: This is typically found near the shock’s reservoir.
  2. Turn the Knob: Clockwise increases compression, while counterclockwise decreases it. For aggressive riders or rough terrain, stiffer compression (clockwise) provides better control.

Rebound Damping

Rebound damping regulates how quickly the shock returns to its original position after compressing. To adjust:

  1. Find the Rebound Knob: This is usually located at the bottom of the shock.
  2. Adjust the Knob: Turning clockwise slows down the rebound, while turning counterclockwise speeds it up. Slower rebound works best for heavier riders or technical terrain, while faster rebound is suitable for lighter riders or smoother trails.

Maintenance of the Fenix COIL Rear Shock

Routine maintenance is essential to keep the Fenix COIL Rear Shock in peak [paid link] condition. Regular maintenance will prevent premature wear and tear, ensuring consistent performance. Here’s what you need to do:

Cleaning

  1. Wipe Down the Shock: After each ride, clean the shock with a damp cloth to remove dirt and debris. Pay special attention to the shock’s eyelets and the mounting hardware.
  2. Inspect the Seal: Check for any oil leaks around the seals. If you notice oil, it may indicate that the seals need replacement.

Lubrication

  1. Lubricate the Shock Bushings: Apply a light coat of suspension-specific grease to the bushings on the shock mounts to ensure smooth movement.
  2. Check the Spring: Ensure the coil spring is not corroded or damaged. If it shows signs of wear, it may need to be replaced.

Suspension Oil

  1. Check Suspension Oil Levels: Over time, the oil inside the shock may degrade. It’s a good practice to check the oil levels every 6-12 months or as per the manufacturer’s recommendations.
  2. Change the Oil: If the oil is contaminated or degraded, drain and replace it with fresh suspension oil. Follow the manufacturer’s instructions for the correct type and amount of oil.

Troubleshooting Common Issues

Shock Feels Too Soft

  • Cause: The compression damping may be set too low, or the spring rate might be too light for your weight and riding style.
  • Solution: Increase the compression damping by turning the knob clockwise. If that doesn’t help, consider switching to a stiffer coil spring.

Excessive Rebound

  • Cause: The rebound damping may be too fast, causing the shock to extend too quickly after compression.
  • Solution: Adjust the rebound knob clockwise to slow the rebound rate.

Noisy Shock

  • Cause: A noisy shock can be caused by dirt, debris, or insufficient lubrication in the bushings.
  • Solution: Clean the shock thoroughly and apply lubricant to the shock’s eyelets and bushings. If the noise persists, inspect the seals for wear.

Customization and Optimization for Better Performance

To extract maximum performance from your Fenix COIL Rear Shock, consider these tips for fine-tuning:

  1. Adjust Spring Rate: If you’re consistently bottoming out or not using the full travel, consider upgrading to a coil spring with a higher spring rate. Conversely, a lighter spring can improve comfort and sensitivity if you’re a lighter rider.
  2. Tuning for Terrain: For smoother trails, set the shock’s compression to be more responsive, while on technical terrain, dial in more resistance to prevent bottoming out.
  3. Fine-tune Rebound: Adjust the rebound damping based on your riding style. Aggressive riders or those descending quickly may need slower rebound, while those who focus on climbing may prefer a quicker return to maximize efficiency.

Compatibility with Other Drivetrain Components

The Fenix COIL Rear Shock is compatible with a wide range of modern mountain bike frames that support coil shock systems. When choosing a frame, make sure to check the shock’s eyelet size, stroke length, and shock mount dimensions to ensure a proper fit. Additionally, pairing this shock with a high-end drivetrain and suspension fork designed for aggressive riding will provide a balanced ride and enhance overall performance.

Conclusion

Riders trust the Fenix COIL Rear Shock for its durability, performance, and the level of control it offers on even the most challenging terrain. Its adjustability allows riders to tailor it to their specific needs, ensuring a personalized ride. Whether you’re installing, adjusting, or troubleshooting, keeping this rear shock well-maintained will allow you to enjoy a smoother and more controlled ride for years to come. By fine-tuning it to match your riding style and terrain, the Fenix COIL will continue to perform at its peak [paid link], making it a favorite for riders looking to push their limits.