Is the STX22 Air the Best Rear Shock for Mountain Bikes?

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The Öhlins STX22 Air rear shock is a highly regarded option in the world of mountain biking. Designed to offer advanced performance, smooth handling, and a customizable ride, it caters to riders looking for enhanced control and comfort. This article will provide a detailed guide to the installation, maintenance, troubleshooting, and optimization of the STX22 Air. We will also explore its compatibility with other components and compare it to similar models, helping you determine if it’s the best choice for your mountain bike.

Installation of the STX22 Air Rear Shock

Installing the STX22 Air rear shock on your mountain bike requires careful attention to detail. Here’s how to ensure a proper installation:

  1. Prepare Your Bike Frame: Ensure your frame is clean and free from dirt or debris. Use a clean cloth to wipe down the shock mount areas.
  2. Remove the Existing Shock (If Applicable):
    • Use a 5mm Allen wrench [paid link] to remove the bolts securing the existing shock. Keep the bolts in a safe place as you may need them for the installation of the new shock.
    • Take note of any spacers or washers that may need to be reused.
  3. Insert the STX22 Air Rear Shock:
    • Position the STX22 Air shock in place, ensuring it aligns correctly with the shock mounts on the frame.
    • Use the appropriate size bolts (typically 8mm or 10mm, depending on your frame) to secure the shock. Torque them to the manufacturer’s recommended specifications.
  4. Check Shock Sag:
    • Once the shock is installed, check the sag by sitting on your bike in the riding position.
    • Adjust the air pressure using the included valve and pump to achieve the desired sag (usually around 25-30% of the shock’s total travel).

Adjustment and Fine-Tuning

The STX22 Air rear shock offers multiple adjustment options to tailor the performance to your preferences and riding style. Proper adjustment can drastically improve the shock’s performance and your overall ride quality.

  1. Rebound Damping:
    • The STX22 Air features a rebound adjustment dial, which controls how quickly the shock returns after compression.
    • To adjust, turn the dial clockwise for slower rebound or counterclockwise for faster rebound. Experiment with settings to find the right balance for your riding style and terrain.
  2. Compression Damping:
    • The compression adjustment dial allows you to fine-tune how the shock responds to compression under load.
    • A higher setting offers more resistance for aggressive, fast riding, while a lower setting provides a more responsive and plush feel on rough terrain.
  3. Air Spring Pressure:
    • The STX22 Air features an air spring system that requires regular adjustments to maintain optimal performance. Use a shock pump to adjust the air pressure based on rider weight, riding style, and terrain type.
    • Remember, higher pressure provides a firmer ride, while lower pressure offers more plushness but can reduce support.

Routine Maintenance

Proper maintenance is essential to keeping your STX22 Air rear shock functioning at its best. Regularly check for signs of wear or damage and perform necessary maintenance tasks to ensure longevity.

  1. Clean the Shock Regularly:
    • After every ride, wipe down the shock with a clean, damp cloth to remove dirt and debris. This prevents grime from affecting the shock’s seals and moving parts.
    • Avoid using harsh chemicals or solvents that could damage the shock’s surface or seals.
  2. Inspect the Seals:
    • Check the shock seals every few months for signs of wear. Damaged seals can lead to air loss or reduced performance. If seals are damaged, they should be replaced to maintain the shock’s efficiency.
  3. Check for Leaks:
    • Inspect the shock for any signs of oil leakage. Leaks can indicate internal damage or worn seals, and the shock may need to be serviced by a professional technician if leaks are detected.
  4. Shock Rebuild:
    • Over time, the internal components of the shock may wear out, requiring a full rebuild. Öhlins recommends having the shock serviced at regular intervals (usually every 100-150 hours of riding) to ensure it performs optimally.

Troubleshooting Common Issues

Despite its high-quality build, like all components, the STX22 Air rear shock can experience some issues. Below are solutions to common problems riders may face:

  1. Loss of Air Pressure:
    • If you notice the shock losing air pressure, first check the air valve for any visible damage or debris. If the valve is clogged, carefully clean it using a soft brush.
    • If the air pressure continues to drop, inspect the shock seals. Worn seals may need to be replaced, or the shock may require a rebuild.
  2. Inconsistent Rebound:
    • If the rebound feels too fast or too slow despite adjustments, the oil inside the shock may need replacing. Contact an Öhlins technician for service if this issue persists.
  3. Noise or Creaking:
    • Creaking or squeaking noises can indicate that the shock mount bolts are loose or that the bushings are worn. Tighten the bolts and lubricate the bushings to reduce friction and prevent noise.
  4. Sagging or Bottoming Out:
    • If the shock is sagging too much or bottoming out frequently, consider increasing the air pressure. However, ensure that the pressure is within the recommended range for your rider weight.

Customization and Optimization

The STX22 Air rear shock is built for customization. Riders can further optimize it for specific terrains and riding styles. Here are some tips for getting the most out of your shock:

  1. Adjust Air Pressure Based on Terrain:
    • For aggressive downhill riding, slightly increase the air pressure to reduce the risk of bottoming out.
    • For technical, rocky trails, decrease the air pressure for a more plush, controlled ride.
  2. Fine-Tune Compression Settings:
    • Increase compression damping for better control on fast descents or rough terrain.
    • Use lower compression settings for a more sensitive feel on technical climbs and cross-country trails.
  3. Rebound for Control:
    • Adjust the rebound speed to match the trail conditions. For rocky trails, set the rebound slower to prevent the shock from bouncing too quickly. For smoother trails, faster rebound settings can improve bike handling.

Compatibility with Other Drivetrain Components

The STX22 Air rear shock is designed to be highly compatible with a wide range of mountain bike frames and drivetrain components. However, it’s essential to ensure compatibility with your bike’s rear triangle and suspension system.

  1. Frame Compatibility:
    • Ensure your bike’s frame can accommodate the shock’s eye-to-eye length and stroke. The STX22 Air comes in multiple sizes, so it’s crucial to match the shock’s dimensions with your frame’s specifications.
  2. Linkage and Suspension Setup:
    • The performance of the STX22 Air can be influenced by the frame’s linkage system. It works well with a variety of linkage designs, but it’s essential to check that the shock’s damping characteristics complement the frame’s suspension design.

Comparison with Similar Models

When comparing the STX22 Air to other rear shocks on the market, it’s crucial to consider performance, adjustability, and durability.

  • Fox Float X2:
    • The Fox Float X2 is another premium air shock option. While it offers similar adjustability features (rebound, compression), it is often praised for its versatility and slightly more refined tuning. However, the STX22 Air is known for a more plush, comfortable ride on rough trails due to its unique damping design.
  • RockShox Super Deluxe:
    • The RockShox Super Deluxe provides great performance but tends to be a bit more focused on cross-country or lighter trail riding. The STX22 Air, by contrast, excels in aggressive riding scenarios, providing more progressive damping and handling larger impacts with ease.
  • DVO Jade X:
    • The DVO Jade X is another competitor, offering excellent performance in rugged conditions. However, it’s a coil-over shock, which differs from the air spring system in the STX22 Air. For riders who prefer a lightweight, tunable air shock, the STX22 is a superior option.

Conclusion

The Öhlins STX22 Air rear shock stands out as a high-performance option for mountain bikers seeking superior handling, comfort, and adjustability. Its air spring system, combined with customizable damping settings, ensures that it can be fine-tuned to suit various riding styles and terrains. Whether you’re tackling rugged downhills or navigating technical trails, the STX22 Air provides a smooth, controlled ride that enhances overall bike performance. While it may not be the best choice for every rider, it is certainly a top contender for those looking for a premium rear shock in the mountain biking world.