A Comprehensive Guide to STX22 Air Rear Shocks

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The Öhlins STX22 Air Rear Shock is a high-performance shock designed for riders who demand precision, reliability, and ultimate comfort on rough terrain. This rear shock offers a blend of innovative features tailored for both cross-country and trail riding. In this guide, we’ll walk through everything you need to know about installing, adjusting, maintaining, and troubleshooting your STX22 Air Rear Shock.

Installation of the STX22 Air Rear Shock

Installing the STX22 Air Rear Shock requires precision and attention to detail to ensure maximum performance and safety. Follow the steps below for a proper installation.

Tools Required

  • 5mm Allen wrench [paid link]
  • Torque wrench [paid link]
  • Shock pump (Öhlins recommends using their specific pump for accurate pressure adjustments)
  • Threadlocker (optional)
  • Clean rag

Step-by-Step Installation

  1. Prepare the Bike Frame: Ensure your bike is clean and stable. If you’re replacing an old shock, remove it by loosening the bolts that secure the shock to the frame.
  2. Position the Shock: Align the mounting hardware on the STX22 Air shock with the corresponding mounts on your bike’s rear triangle. Double-check that the shock is oriented correctly (with the air valve facing outward).
  3. Install the Bolts: Secure the shock by tightening the mounting bolts with a 5mm Allen wrench [paid link]. Be careful not to overtighten; consult the bike manufacturer’s torque specifications for precise torque values.
  4. Check Shock Alignment: After installation, ensure that the shock is properly aligned with the frame and there’s no excessive movement.
  5. Connect the Air Pump: Attach your shock pump to the air valve and check that the pressure is set according to your weight and riding style. Refer to the shock’s manual for the recommended air pressure range.

Adjusting the STX22 Air Rear Shock

The STX22 Air Rear Shock offers a range of adjustments to fine-tune the ride to your preference. These adjustments can help optimize performance depending on the terrain and rider weight.

Air Pressure

The air pressure setting is crucial for achieving the right amount of sag and support. The STX22 features an easy-to-use air chamber, and you should adjust the air pressure according to your weight and riding style. The ideal sag range is typically between 25-30% of the shock’s total travel.

Rebound Damping

The STX22 Air comes with an adjustable rebound damping system. This allows you to control how quickly the shock returns to its original position after compression. To adjust:

  • Turn the rebound knob clockwise to slow the rebound.
  • Turn it counterclockwise to increase the rebound speed.
    Start with the rebound dial in the middle and adjust from there based on how the bike feels while riding.

Compression Damping

The compression damping controls the shock’s resistance to compression when you hit obstacles. The STX22 features a separate low-speed and high-speed compression adjuster, allowing precise control. To adjust:

  • For low-speed compression, turn the knob to adjust how the shock responds to light inputs such as pedaling.
  • For high-speed compression, use the high-speed adjuster to fine-tune how the shock absorbs large impacts.

Volume Spacers

The STX22 allows for the addition of volume spacers to adjust the shock’s progression. Adding spacers will increase the bottom-out resistance, making the shock stiffer towards the end of the travel. Conversely, removing spacers can make the shock feel more plush and responsive over small bumps.

Maintenance of the STX22 Air Rear Shock

Regular maintenance ensures the longevity and optimal performance of your STX22 Air Rear Shock. Here are some tips to keep your shock in top shape.

Cleaning

After every ride, clean the shock with a clean rag to remove dirt and debris. Pay special attention to the shock’s seals, as dirt can lead to premature wear. Avoid using harsh chemicals—just water and a mild detergent are sufficient for most cleaning tasks.

Lubrication

Lubricate the shock’s moving parts with a light grease or silicone spray. Focus on the shaft and the eyelets where the shock mounts. This helps prevent wear and ensures smooth operation.

Air Pressure Checks

Regularly check the air pressure in your shock. Temperature changes, riding conditions, and even time can affect the pressure, so it’s important to keep it within the recommended range to avoid performance degradation.

Seal Maintenance

Over time, the shock seals can wear out. It’s important to inspect them periodically. If you notice any oil leakage or loss of air pressure, it may be time to replace the seals. Öhlins recommends servicing the seals every 100-150 hours of riding or once a year.

Troubleshooting Common Issues with the STX22 Air Rear Shock

Even the best components may face issues over time. Here’s how to troubleshoot common problems with the STX22 Air Rear Shock.

Loss of Air Pressure

  • Possible Cause: Air leakage from the valve or seals.
  • Solution: Inspect the air valve and seals for any damage. If there’s any visible wear or the shock is losing pressure quickly, replace the seals. Make sure the air valve is properly threaded and tight.

Excessive Bottom-Out

  • Possible Cause: Too little air pressure or insufficient compression damping.
  • Solution: Check the air pressure and adjust to the recommended levels. Increase the compression damping or add volume spacers to the shock for better bottom-out resistance.

Harsh Ride Quality

  • Possible Cause: Incorrect rebound or compression settings.
  • Solution: Fine-tune the rebound and compression damping. Slow the rebound if the shock feels too fast or adjust the compression for better support.

Noisy Shock

  • Possible Cause: Lack of lubrication or dirt in the seals.
  • Solution: Clean the shock thoroughly and lubricate the moving parts. If the noise persists, inspect the seals for wear and replace them if necessary.

Customization and Optimization of the STX22 Air Rear Shock

The STX22 Air Rear Shock is designed with performance and customization in mind. To optimize its performance, consider the following adjustments:

Adjusting for Riding Style

  • Cross-Country Riders: Lower air pressure for a more plush ride with less sag, emphasizing efficiency and comfort.
  • Trail and Enduro Riders: Increase air pressure slightly for a stiffer shock that offers better support on aggressive descents, but still responsive enough for technical climbs.
  • All-Mountain Riders: A balanced approach to air pressure, adjusting the rebound damping for faster or slower return as needed.

Compatibility with Other Drivetrain Components

The STX22 Air Rear Shock is compatible with a wide range of drivetrain components but ensure that the bike’s suspension system is designed to work with air shocks, particularly in terms of the shock’s eyelet and mounting hardware. Check with the manufacturer’s specifications to verify compatibility with your frame.

Comparison with Similar Models

When comparing the Öhlins STX22 Air to other rear shocks on the market, it’s clear that the STX22 offers a unique blend of adjustability, durability, and performance. The key differences between the STX22 Air and other popular models, such as the Fox Float DPS and RockShox Monarch RT3, include:

  • Performance: The STX22 Air offers more fine-tuned adjustments, especially for high-speed compression and volume spacers, allowing for better customization compared to the Fox and RockShox models.
  • Build Quality: Öhlins is known for its superior build quality and consistent performance, which often outlasts other models under extreme conditions.
  • Weight: The STX22 Air is slightly lighter than both the Fox Float DPS and RockShox Monarch RT3, making it a great option for riders looking for a balance between performance and weight.

Overall, the Öhlins STX22 Air Rear Shock is an excellent choice for riders who seek a shock with advanced adjustability, reliable performance, and long-term durability.