The Öhlins STX22 Air Rear Shock is a high-performance suspension component designed for riders seeking superior comfort and control on their road bike. Known for its precision, durability, and ability to handle rough terrains, maintaining your STX22 Air shock is essential for optimal performance and longevity. This guide provides detailed instructions on how to install, adjust, maintain, and troubleshoot your STX22 Air shock. Additionally, we will explore customization options, compatibility considerations, and compare the STX22 Air with similar models to help you make an informed decision.
Tools Required
- Shock pump
- 5mm and 6mm Allen wrenches [paid link]
- 3mm Allen wrench [paid link]
- Torque wrench [paid link]
- Soapy water or degreaser
- Brush
- Rags
- Suspension oil (Öhlins recommended)
- Grease (high-quality bicycle grease)
- Clean container for oil draining
- Replacement seals and O-rings (if necessary)
Installation of the STX22 Air Rear Shock
Step 1: Prepare the Bike
Before installing the STX22 Air Rear Shock, ensure that your bike is stable and secure, ideally mounted on a work stand. Remove any components that might obstruct access to the rear shock, including the rear wheel if necessary.
Step 2: Remove the Old Shock
Using a 5mm or 6mm Allen wrench [paid link], remove the bolts securing the old rear shock to the frame. Make sure to support the shock while removing the bolts to avoid any sudden movements that could cause damage to the frame or shock.
Step 3: Install the New STX22 Air Rear Shock
Place the STX22 Air shock into the rear shock mount of your bike. Ensure that the shock is aligned properly and that the eyelet bearings or bushings are positioned correctly. Tighten the mounting bolts using the appropriate wrench, making sure to follow the manufacturer’s torque specifications to avoid over-tightening.
Step 4: Connect the Air Shock to the Frame
Once the shock is installed, connect the shock’s air spring to the frame. Use a shock pump to adjust the air pressure according to your weight, riding style, and terrain. The recommended air pressure can be found in the user manual or from the Öhlins website.
Step 5: Test the Shock
After installation, perform a thorough test by pushing down on the rear of the bike and checking the shock’s compression and rebound functions. Ensure that there are no unusual noises or movements, indicating that the shock is seated properly.
Adjusting Your STX22 Air Rear Shock
Rebound Adjustment
The STX22 Air shock allows for precise rebound adjustments to fine-tune how quickly the shock returns after compression. Locate the rebound adjustment knob on the shock and turn it clockwise to slow down the rebound or counterclockwise to speed it up. For optimal performance, adjust the rebound to match your riding style and the terrain you will be riding on.
Compression Adjustment
The compression knob on the STX22 Air lets you adjust how the shock reacts to compressive forces, such as hitting bumps or drops. To adjust, turn the knob clockwise for stiffer compression or counterclockwise for a softer response. This is important for ensuring that the shock remains responsive and supportive without bottoming out.
Volume Spacers
The STX22 Air shock includes volume spacers that allow you to adjust the shock’s air spring curve. By adding or removing spacers, you can alter the shock’s progressiveness to suit your riding preferences. Adding spacers makes the shock more progressive, while removing them creates a more linear feel. Experiment with different configurations to find the ideal balance.
Regular Maintenance for Optimal Performance
Cleaning the Shock
Regular cleaning is crucial for maintaining the STX22 Air shock’s performance and longevity. After each ride, use a clean, damp cloth to wipe down the shock body and remove dirt and debris. If your rides involve particularly muddy conditions, use a degreaser or soapy water to clean the shock thoroughly. Avoid using high-pressure water, as it can force contaminants into the shock seals.
Lubricating the Seals
The seals on the STX22 Air shock are vital in preventing dirt and moisture from entering the internal components. Apply a light coat of suspension grease to the shock seals during routine maintenance. This will help prolong seal life and ensure smooth operation.
Air Pressure Checks
Consistent air pressure maintenance is essential for keeping the shock responsive. Check the air pressure regularly, especially before long rides. Fluctuations in air pressure can occur due to temperature changes, so be sure to adjust the pressure as needed using a shock pump.
Oil Service
At regular intervals (every 50-100 hours of riding), you should perform an oil service to ensure the shock’s internal components remain well-lubricated. To do this, remove the shock from the bike and drain the old oil into a clean container. Refill with fresh suspension oil (Öhlins recommended) and ensure that all parts are properly lubricated before reassembling the shock.
Troubleshooting Common STX22 Air Rear Shock Issues
Loss of Air Pressure
If you notice a significant drop in air pressure, it could indicate a slow air leak. Check the air valve for any damage or debris. If necessary, replace the valve core or O-rings. Additionally, inspect the shock’s seals and bushings for any signs of wear that could allow air to escape. If the issue persists, you may need to take the shock to a professional technician for further inspection.
No Rebound or Compression Adjustment
If the rebound or compression adjustments are not working as expected, it may be due to a hydraulic issue within the shock. This could result from contaminated oil, worn-out internal components, or air trapped within the shock. Perform an oil service and check the internal components for any damage. If the problem persists, contact Öhlins customer support or a qualified technician for assistance.
Unusual Noises
Hearing a knocking or clicking noise from the rear shock can often be attributed to worn-out bushings or misalignment of the shock within its mount. Check that the shock is properly seated in the mount and that the bolts are tightened to the correct torque specifications. If the noise continues, inspect the bushings for wear and replace them if necessary.
Customization and Optimization for Better Performance
Tuning for Your Riding Style
To get the best performance from your STX22 Air shock, fine-tune it to match your specific riding style. Riders who frequently ride on rough terrain or prefer aggressive riding may want to increase the compression damping to prevent bottoming out. On the other hand, riders who prioritize comfort and traction may prefer a softer setup with more rebound damping.
Fine-Tuning Volume Spacers
As mentioned earlier, volume spacers offer another layer of customization for your shock. Adjusting the spacer configuration can make a significant difference in how your bike handles. For downhill riders, a more progressive shock feel (via more spacers) can help prevent harsh bottoming out on big hits, while cross-country riders may prefer a more linear shock feel for better pedaling efficiency.
Compatibility with Other Drivetrain Components
The Öhlins STX22 Air Rear Shock is compatible with most modern road bike frames equipped with rear shock mounts that follow standard dimensions. However, it is essential to verify the shock’s eyelet and mounting hardware compatibility with your frame before installation. Additionally, the shock’s performance is optimized when used with a compatible drivetrain setup, including the proper gearing and suspension settings for your type of riding.
Comparison with Similar Models
When comparing the STX22 Air Rear Shock with other models, such as the Fox Float DPS or RockShox Super Deluxe, the Öhlins model stands out for its precise adjustability and air spring sensitivity. The STX22 Air offers a more personalized feel, particularly for riders who value fine-tuning their suspension settings. While the Fox and RockShox models may excel in certain performance aspects, the STX22 Air provides a unique combination of adjustability, durability, and consistent performance across varying terrain.
In conclusion, the STX22 Air Rear Shock by Öhlins is a robust and versatile component that can be customized and maintained to suit a variety of riding styles. By following the installation, maintenance, and troubleshooting steps outlined in this guide, you can ensure that your shock remains in optimal condition, providing you with the comfort and control you need on your rides.