The STX22 Air [paid link] rear shock from Öhlins stands as a remarkable piece of engineering in the cycling world, offering riders top-tier performance for both cross-country and trail riding. Designed for enthusiasts and competitive riders alike, this rear shock combines advanced technology, superior durability, and customizable features. In this guide, we will break down the installation, adjustment, maintenance, troubleshooting, and optimization of the STX22 Air [paid link], while also exploring its compatibility and performance relative to other shocks on the market.

Installation of the STX22 Air Rear Shock

Tools Required

• Torque wrench [paid link]
• 5mm Allen key
• Shock pump
• Anti-seize compound
• Rags for cleaning
• 10mm wrench (if applicable for specific models)

Step-by-Step Installation Guide

1. Preparation: Clean the shock mounting area on the frame to ensure there is no dirt or debris that could interfere with installation.
2. Remove the old shock: Use a 5mm Allen key to remove the bolts securing the previous shock. Make sure to retain the hardware for reinstallation if needed.
3. Mount the STX22 Air Shock: Carefully position the STX22 Air shock into its mounting points. Ensure that the shock’s eyelets align properly with the frame.
4. Secure the Shock: Tighten the mounting bolts using a torque wrench [paid link]. Refer to the manufacturer’s specified torque settings (typically between 6-8Nm).
5. Inflate the Shock: Attach a shock pump to the air valve and inflate the STX22 Air to the recommended pressure based on rider weight and riding style.
6. Check Alignment: Once installed, double-check the shock’s alignment and make sure there’s no interference with the frame, brake lines, or other components.
7. Test Ride: After installation, take a short test ride to ensure everything is securely fastened and the shock performs as expected.

Adjustment of the STX22 Air Rear Shock

The STX22 Air shock offers a range of adjustments that help fine-tune the ride to suit different terrains and rider preferences. These adjustments include rebound, compression, and air pressure. Here’s how you can fine-tune the shock:

Rebound Adjustment

Rebound controls how quickly the shock returns to its original position after compression.

• Increase Rebound: If you want the shock to return slower, turn the rebound dial clockwise.
• Decrease Rebound: For a quicker return, turn the dial counterclockwise.

Compression Adjustment

Compression damping determines how the shock handles impacts and small bumps.

• Increase Compression: Turning the compression dial clockwise increases damping, which is useful for more aggressive riding or rough terrain.
• Decrease Compression: Turning it counterclockwise allows for a more plush ride, ideal for smoother terrain or lighter riders.

Air Pressure

Air pressure adjusts the overall stiffness of the shock.

• Use a shock pump to inflate the shock to the recommended psi based on your weight and riding style. A higher air pressure will give you more support, while lower pressure offers more comfort but less support.

Maintenance of the STX22 Air Rear Shock

Proper maintenance is key to ensuring the longevity and performance of the STX22 Air shock. Regular maintenance includes cleaning, checking for air pressure loss, and ensuring the shock is functioning optimally.

Cleaning

After every ride, clean the shock with a damp cloth to remove dirt and debris. This prevents grit from entering the shock’s internals, which could cause premature wear.

Checking Air Pressure

It is recommended to check the air pressure before each ride. Air can leak from the shock, especially after extended use or extreme conditions, so keeping it properly inflated ensures optimal performance.

Lubrication

Lubricate the shock’s bushings periodically to maintain smooth performance. Use an appropriate lubricant to avoid excess build-up, which could attract dirt.

Annual Service

At least once a year, or after heavy use, perform a full service on the STX22 Air shock. This involves disassembling the shock, inspecting internal components for wear, and replacing seals if necessary.

Troubleshooting Common Issues

While the STX22 Air shock is designed to be durable, some issues may arise over time. Here’s how to address common problems:

Issue 1: Loss of Air Pressure

If the shock seems to have lost air pressure, check the air valve for leaks. It’s possible the valve is not sealed properly or the shock may need an internal service. You can use soapy water around the valve area to check for bubbles, indicating a leak.

Issue 2: Rebound Not Working Properly

If the rebound feels either too fast or too slow despite adjustments, it could be due to air contamination in the shock. You may need to perform a full service to remove any air or contaminants trapped inside.

Issue 3: Clunking or Noisy Shock

A clunking noise can often be attributed to dried-out seals or lack of lubrication in the bushings. Ensure that you regularly clean and lubricate the shock to prevent such issues.

Customization and Optimization for Better Performance

The STX22 Air shock offers several customization options that can optimize your ride for better performance. Riders can experiment with different air pressures, rebound, and compression settings to find the best setup for their riding style and conditions.

Tuning for Specific Conditions

• Cross-Country Riders: A higher air pressure with firmer compression and quick rebound will provide better support and efficiency for climbing and fast trail sections.
• Trail Riders: A lower air pressure combined with moderate compression and rebound settings offers a more forgiving ride, perfect for absorbing bumps and drops on rough terrain.

Adding Volume Spacers

Volume spacers can be added inside the air canister to adjust the progressivity of the shock. This helps tailor the shock’s performance, allowing it to perform better on larger impacts or prevent bottoming out during aggressive riding.

Comparison with Similar Models

When comparing the STX22 Air shock to other rear shocks like the RockShox Monarch RT3 [paid link] or Fox Float DPS, the STX22 stands out in several key areas.

• Build Quality: Öhlins is known for producing high-end suspension components, and the STX22 Air is no exception. It offers excellent durability and smooth performance, even on long rides.
• Adjustability: The STX22 Air provides extensive adjustability with fine-tuned compression and rebound settings, offering a higher level of customization than many other models at similar price points.
• Weight: While the STX22 Air is slightly heavier than the RockShox Monarch RT3 [paid link], it compensates with a superior performance profile, especially on aggressive terrain.

Compatibility with Other Drivetrain Components

The STX22 Air shock is compatible with a wide range of mountain bike frames. However, it’s essential to ensure that the shock’s eyelet and mounting hardware match your bike’s specifications. Some frames may require an adapter for correct fitment. The shock is optimized for use with a wide variety of drivetrains, including SRAM and Shimano systems, without affecting drivetrain performance.

When setting up your bike, be sure to double-check that the shock’s stroke length and eyelet width match the specifications of your frame. Improper compatibility can result in suboptimal performance and potential damage to both the shock and frame.