Introduction

The TTX22M Trunnion [paid link] Rear Shock by Öhl

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ins is a high-performance suspension component designed for mountain bikers who demand precision and durability in rugged [paid link] terrains. Its advanced technology offers a seamless balance between comfort and control, making it an ideal choice for various riding styles. Regular maintenance and fine-tuning are essential to keep the shock performing at its best, ensuring a smooth and responsive ride.

This guide will provide a step-by-step approach to installing, adjusting, and maintaining the TTX22M Trunnion [paid link] Rear Shock. It will also cover troubleshooting tips, optimization for performance, and compatibility with other drivetrain components. Whether you’re a seasoned rider or new to bike maintenance, this article will equip you with all the necessary tools and knowledge to take care of your rear shock.

Tools Required

• 3mm, 4mm, and 5mm Allen wrenches [paid link]
• Torque wrench [paid link] (adjustable to 0-60Nm)
• Shock pump (compatible with Öhlins specifications)
• Hydraulic fluid (Öhlins recommended type)
• Suspension grease (Öhlins recommended type)
• Soft cloth
• Rags
• Allen key tool for trunnion mount

Installation of the TTX22M Trunnion Rear Shock

Installing the TTX22M Trunnion Rear Shock correctly is crucial to ensure optimal performance. The installation process is straightforward, but you must follow each step carefully to avoid damage to the shock or the bike frame.

1. Prepare the bike and workspace: Before beginning installation, ensure the bike is stable on a work stand. Make sure all necessary tools are within easy reach.
2. Remove the old shock (if applicable): If you’re replacing an existing rear shock, remove it first. Use the appropriate Allen wrenches [paid link] to loosen and remove the bolts from the shock’s mounting points. Keep the mounting hardware as you may need it for the new shock installation.
3. Apply suspension grease: Apply a thin layer of suspension grease to the mounting points of the TTX22M Trunnion Rear Shock. This helps prevent corrosion and ensures a smooth interface between the shock and the frame.
4. Install the shock into the frame: Position the shock into the trunnion mount on the frame. Ensure it is aligned correctly before securing it. Insert the mounting bolts and tighten them to the specified torque settings as per the manufacturer’s recommendation.
5. Secure the shock: Use the torque wrench [paid link] to tighten the bolts to the correct torque values (typically around 40Nm for the trunnion mount). Be careful not to overtighten as it could damage the shock or the frame.
6. Check alignment: Ensure that the shock is aligned properly in both the horizontal and vertical axes. The shock’s body should be parallel to the bike’s frame to ensure optimal performance and prevent undue stress on the mount.

Adjustment of the TTX22M Trunnion Rear Shock

After installation, it’s essential to adjust the TTX22M Trunnion Rear Shock to suit your riding style and terrain conditions. Fine-tuning the shock settings will maximize comfort and control.

Air Pressure Setup

1. Set initial air pressure: Using a shock pump, adjust the air pressure to the recommended baseline settings based on your rider weight. You can find the recommended air pressure settings in the user manual or on Öhlins’ website. Start with a basic value, then fine-tune according to personal preference.
2. Check sag: Sag is the amount the shock compresses under rider weight. It is crucial to adjust this correctly for optimal performance. To check sag, sit on the bike in riding position and note how much the shock compresses. The ideal sag typically falls between 25-30% of the shock’s total travel.
3. Adjust air pressure: If the sag is too deep or shallow, adjust the air pressure accordingly. Decreasing the air pressure will increase sag, while increasing the air pressure will reduce sag. Always make small adjustments and recheck after each change.

Compression and Rebound Damping

1. Set compression damping: The TTX22M features external compression adjustment. To adjust the compression, use the dial located on the shock body. Start with the manufacturer’s recommended setting and fine-tune from there. Adjusting the compression allows you to control how the shock behaves under impacts, from softening landings to firming up for better efficiency.
2. Set rebound damping: Rebound damping controls how quickly the shock returns to its extended position after compression. Adjust the rebound knob to match your riding conditions. For faster rebound, decrease the damping; for slower rebound, increase the damping. The ideal rebound setting is one that allows the shock to return smoothly without bouncing.
3. Test the adjustments: After making adjustments, take the bike out for a short ride. Pay attention to the ride feel—if the bike feels too soft, increase compression damping, or if it feels too stiff, reduce compression. Similarly, adjust the rebound to prevent any unwanted bouncing.

Maintenance of the TTX22M Trunnion Rear Shock

Routine maintenance is vital for extending the lifespan of your TTX22M Trunnion Rear Shock and ensuring it functions smoothly. Regularly servicing the shock prevents wear and tear while maintaining peak [paid link] performance.

Cleaning and Inspection

1. Clean the shock regularly: After each ride, wipe down the shock with a soft cloth to remove dirt, mud, or debris. Be cautious not to let the suspension oil come into contact with any abrasive materials.
2. Inspect for damage: Regularly check the shock for signs of wear or damage, including cracks, oil leaks, or excessive play. If any damage is detected, contact an authorized Öhlins service center for repairs.
3. Lubricate the mounting points: Periodically, remove the shock and clean the mounting points on both the frame and the shock. Apply a thin layer of suspension grease before reinstalling the shock.

Hydraulic Fluid Maintenance

1. Monitor fluid levels: Over time, the hydraulic fluid within the shock can degrade. Keep an eye on performance issues that may indicate low fluid levels or contamination, such as a decrease in damping performance or excessive rebound.
2. Flush the shock: To maintain optimal performance, flush the shock with new hydraulic fluid every 50-100 riding hours. This can be done by an authorized technician or following the Öhlins service manual if you choose to perform the task yourself.

Troubleshooting Common Set-Up Issues

While the TTX22M Trunnion Rear Shock is a high-performance component, some common issues may arise during setup. Below are a few troubleshooting tips:

1. Shock Bottoming Out: If the shock bottoms out too easily, this might indicate insufficient air pressure or compression damping. Try increasing the air pressure and adjusting the compression settings.
2. Excessive Rebound or Bouncing: If the bike feels like it’s bouncing excessively after a bump or jump, this could be caused by too much rebound damping. Decrease the rebound setting until you find the proper balance.
3. Sag Issues: If the sag appears too deep or shallow, the air pressure may not be adjusted correctly. Follow the manufacturer’s recommended air pressure guidelines and make minor adjustments based on your body weight and riding style.

Customization and Optimization for Better Performance

For riders who want to push their TTX22M Trunnion Rear Shock to its maximum potential, customization is key. Riders can adjust the shock’s air pressure, damping settings, and even swap out internal components to suit their specific riding preferences.

1. Upgrade to premium seals and oils: Upgrading to high-quality seals and oils can significantly improve the performance and longevity of the shock. Look for Öhlins-approved options that are designed for the TTX22M.
2. Fine-tuning adjustments: Experiment with different compression and rebound settings depending on your riding style. For technical trails, a more progressive compression setting with quicker rebound may offer more control. For smoother trails, a firmer compression setting with slower rebound might offer better efficiency.

Compatibility with Other Drivetrain Components

The TTX22M Trunnion Rear Shock is designed to work seamlessly with most modern mountain bike drivetrains. However, when considering compatibility, it’s important to keep the following in mind:

1. Frame Compatibility: Ensure that your frame is designed for a trunnion mount. The TTX22M features a trunnion mount that requires specific dimensions, so it’s critical to verify your bike frame’s compatibility before purchasing.
2. Drivetrain Integration: The shock’s performance can affect your bike’s overall suspension system, including how it interacts with the fork. While the TTX22M is compatible with most modern mountain bikes, consider pairing it with an Öhlins fork for optimal performance integration.