Overview of the Öhlins STX22 Coil Rear Shock

The Öhlins STX22 Coil rear shock represents cutting-edge suspension technology, designed for serious mountain bikers seeking high performance and durability. It features a coil-sprung shock absorber, which provides a more consistent and predictable ride compared to air shocks. With Öhlins’ reputation for precision engineering, the STX22 is a preferred choice for riders demanding advanced suspension solutions for challenging terrains. This guide explores the installation, adjustment, maintenance, troubleshooting, and customization of the STX22 Coil rear shock, offering expert-level insights for both beginner and experienced cyclists.

Key Features of the Öhlins STX22 Coil Rear Shock

Before diving into the technical aspects, let’s highlight the key features of the STX22 Coil rear shock:

• Coil Spring Design: Provides a smoother, more consistent ride under load, especially on rough or technical trails.
• Adjustable Rebound and Compression Damping: Allows for fine-tuning to match riding style and terrain.
• Twin-tube Design: Ensures optimal damping performance with a separate oil and gas chamber, increasing reliability and heat dissipation.
• External Reservoir: Enhances shock performance by keeping oil cool and ensuring long-term durability.
• High-Quality Construction: Built with Öhlins’ renowned craftsmanship, it offers exceptional longevity and performance.

Tools Required

To install and adjust the Öhlins STX22 Coil rear shock, you will need the following tools:

• Torque wrench [paid link]
• 5mm, 6mm, and 8mm Allen wrenches [paid link]
• Shock pump (for adjusting air pressure, if applicable)
• Specialized shock spring tool (for coil removal or replacement)
• Suspension fluid (if servicing the shock)
• Clean rag and lubricants

Installation of the STX22 Coil Rear Shock

Installing the Öhlins STX22 Coil rear shock requires careful attention to detail to ensure proper functionality and safety. Here are the steps to install it:

1. Prepare the Bike: Secure the bike on a work stand. Ensure the rear triangle is clean and free from debris, as dirt can affect the installation process.
2. Remove the Old Shock (if applicable): Use the appropriate Allen wrenches [paid link] to remove the fasteners holding the old shock in place. Support the rear triangle while doing this to avoid damage.
3. Align the STX22 Coil Shock: Place the STX22 coil shock into the shock mount, aligning the eyelet on the shock with the corresponding mounts on the frame.
4. Attach the Shock: Insert the bolts through the shock mount and tighten them using the specified torque values. Always follow the torque specifications provided by Öhlins for optimal performance and safety.
5. Re-check the Installation: Double-check all bolts to ensure they are secure and have been torqued correctly. Ensure the shock is mounted symmetrically on both ends.
6. Check for Clearance: Verify that the shock does not interfere with the frame or rear wheel during full compression.

Adjustment and Tuning of the STX22 Coil Rear Shock

Fine-tuning the STX22 Coil rear shock allows you to tailor it to your specific riding needs. The shock comes with multiple adjustment features:

Rebound Damping Adjustment

• Purpose: Controls how quickly the shock returns to its extended position after compression.
• Adjustment: Turn the rebound knob located at the base of the shock. A slower rebound (turn clockwise) helps with control on fast, technical terrain, while a faster rebound (turn counterclockwise) may be better for smoother trails.

Compression Damping Adjustment

• Purpose: Determines the shock’s resistance to compression under load.
• Adjustment: The compression knob on the reservoir allows you to adjust how the shock responds to impacts. Increasing compression damping (turn clockwise) gives a firmer feel for aggressive riding and large hits, while decreasing it (turn counterclockwise) makes the shock more sensitive for smoother rides.

Coil Spring Preload

• Purpose: Adjusts the initial sag of the shock, which is the amount it compresses under the rider’s weight.
• Adjustment: Use the spring preload adjuster to set the desired sag. For optimal performance, you should aim for 25-30% sag depending on your weight and riding style.

Maintenance of the Öhlins STX22 Coil Rear Shock

Regular maintenance ensures your STX22 Coil shock delivers top-notch performance throughout its lifespan. Here’s how to maintain it:

Cleaning the Shock

• Routine Cleaning: After every ride, use a clean rag to wipe off any dirt, mud, or water from the shock body. This prevents dirt from entering the internals and causing wear.
• Shock Shaft Maintenance: Inspect the shock shaft for any signs of damage or excessive wear. Clean the shaft using a soft cloth and lubricate it lightly with suspension-specific oil.

Servicing the Shock

• Frequency: Öhlins recommends servicing the STX22 Coil rear shock at least once a year, depending on riding conditions.
• Fluid Replacement: Over time, shock oil can degrade, so it’s essential to replace it during service. Ensure you use the appropriate suspension fluid recommended by Öhlins.
• Spring Replacement: If you experience inconsistent performance or noticeable wear on the coil, consider replacing it. Use the specialized spring tool to remove and install a new spring, ensuring it is properly indexed.

Troubleshooting Common Issues with the STX22 Coil Rear Shock

While the STX22 Coil rear shock is designed for durability and high performance, there are a few common issues that may arise:

Shock Not Rebounding Properly

• Possible Cause: Low rebound damping setting or low shock fluid levels.
• Solution: Check the rebound setting and adjust it accordingly. If the issue persists, consider servicing the shock and replacing the oil.

Excessive Bottoming Out

• Possible Cause: Insufficient spring rate or improper coil preload.
• Solution: Check the coil spring rate to ensure it is appropriate for your weight and riding style. Adjust the preload or replace the spring if necessary.

No Compression Resistance

• Possible Cause: Damaged internal components or loss of damping fluid.
• Solution: Perform a shock service to check for damaged seals or worn internal parts. Refill the shock with fresh suspension fluid if needed.

Customization and Optimization for Better Performance

The Öhlins STX22 Coil rear shock offers several ways to optimize your setup for specific needs:

Adjusting for Terrain

• For Technical Trails: Increase compression damping and decrease rebound to improve control on rough terrain.
• For Enduro or Downhill Riding: Use a firmer coil spring with additional preload to handle higher loads and big hits more efficiently.

Tailoring to Rider Weight and Style

• For Lighter Riders: Use a softer spring rate and adjust the preload to achieve the correct sag for your weight.
• For Heavier Riders: A firmer spring may be required, along with additional preload adjustments to prevent bottoming out.

Compatibility with Other Drivetrain Components

The STX22 Coil rear shock is designed to work seamlessly with most modern mountain bike frames, but compatibility should still be checked before purchase. Ensure your frame has the correct shock mount dimensions, including eyelet size and shock stroke length, to match the STX22’s specifications. Also, note that the shock’s spring rate must complement the rider’s weight and riding style.

Comparison with Other Models

When compared to other coil shocks, the Öhlins STX22 stands out due to its premium build quality and exceptional damping performance. Models like the Fox DHX2 or the RockShox Super Deluxe Coil also offer high-end performance but may differ in features such as adjustability and price point. The Öhlins shock, however, is particularly favored by riders who prioritize smooth, consistent performance with a highly refined damping system.

The STX22 offers superior heat dissipation, less fade, and greater customization potential, making it an excellent choice for serious riders looking for a top-tier rear shock.