The Öhlins TTX22M Trunnion [paid link] rear shock is a high-performance suspension component designed for serious riders who demand exceptional control, comfort, and durability. Whether you’re tackling rugged [paid link] trails or fine-tuning your race bike, the TTX22M Trunnion [paid link] offers a noticeable upgrade to your bike’s overall performance. This guide will walk you through the installation, adjustment, maintenance, troubleshooting, and optimization of this model, helping you get the most out of your new suspension.
Installation of the TTX22M Trunnion Rear Shock
Installing the Öhlins TTX22M Trunnion rear shock requires some technical knowledge, but with the right tools and careful steps, you can install it successfully and enjoy its enhanced performance.
Tools Required
- 5mm Allen wrench [paid link]
- Torque wrench [paid link]
- Socket wrench
- Appropriate suspension oil (Öhlins recommended)
- Replacement seals (if needed)
- Clean cloth or rag
- Shock pump
Step-by-Step Installation Process
- Prepare Your Bike: Place your bike in a stable stand and ensure the area around the rear shock is clean and free from debris.
- Remove the Existing Shock: Use a 5mm Allen wrench [paid link] to remove the bolts securing your current rear shock to the frame. Carefully slide the shock out of the mounts.
- Check Shock Mounts: Inspect the shock mounting points on the frame and the shock itself for any signs of wear or damage. Replace any worn parts before proceeding.
- Install the TTX22M Trunnion Rear Shock: Slide the TTX22M into position in the shock mount. Ensure the shock is aligned properly and that the trunnion mounts fit perfectly with the frame.
- Secure the Shock: Tighten the bolts with a 5mm Allen wrench and use a torque wrench [paid link] to tighten to the manufacturer’s recommended specifications.
- Set the Sag: Use a shock pump to adjust the air pressure in the shock. Aim for the correct sag, usually around 25-30% of the total shock travel, depending on your weight and riding style.
- Check for Smooth Movement: Compress the shock to ensure it moves smoothly without any binding or unusual resistance.
Adjusting the TTX22M Trunnion Rear Shock for Performance
The TTX22M Trunnion rear shock offers several key adjustments to fine-tune your ride. The main adjustments include rebound damping, compression damping, and air pressure. Here’s how to make those adjustments:
Rebound Damping Adjustment
Rebound damping controls how quickly the shock returns after compression. Too fast, and the bike will feel bouncy; too slow, and it may feel sluggish and uncomfortable.
- Adjusting Rebound: Turn the rebound knob on the bottom of the shock to make adjustments. Turning it clockwise increases rebound damping, while counterclockwise reduces it. Start with the factory setting and experiment to find your preferred balance.
Compression Damping Adjustment
Compression damping controls how the shock responds to bumps and impacts. Adjusting this allows you to control how stiff or plush the rear suspension feels.
- High-Speed Compression: Located on the top of the shock, this knob adjusts the damping for fast hits (like landing from a jump). A stiffer setting will prevent bottoming out, while a softer setting offers more comfort on rough terrain.
- Low-Speed Compression: Also on the shock body, this knob adjusts the damping for slower movements (like pedaling). A higher setting will resist pedal-induced bobbing, while a lower setting provides more comfort.
Air Pressure Adjustment
Air pressure directly impacts the shock’s overall performance and how much it compresses under load.
- Setting the Air Pressure: Using a shock pump, adjust the air pressure to match your rider weight and preferred sag setting. Always check the manufacturer’s recommended range and ensure you’re within that range for optimal performance.
Maintenance and Longevity of the TTX22M Trunnion Rear Shock
To maintain the performance of your TTX22M Trunnion rear shock, regular maintenance is essential. Proper care will extend its lifespan and ensure it continues to perform at its peak [paid link].
Regular Cleaning
After each ride, wipe down the shock with a clean cloth to remove any dirt, mud, or debris. Pay close attention to the shaft and seals. Keeping the shock clean helps prevent premature wear and seals from becoming compromised.
Lubrication and Seals
Öhlins recommends regularly lubricating the shock seals to ensure smooth operation. Depending on usage, you may need to replace seals after extended periods of riding or if you notice oil leaks around the shock body. Use Öhlins-specific suspension oil for best results.
Periodic Servicing
While the TTX22M Trunnion rear shock is built to last, it’s a good idea to have it serviced by a professional mechanic every 12-18 months, depending on how frequently you ride and the conditions. A full service includes oil replacement, inspection of the damper and seals, and re-greasing of moving parts.
Troubleshooting Common Set-Up Issues
Although the TTX22M Trunnion rear shock is a robust and reliable component, riders may encounter some common issues. Below are a few troubleshooting tips to help resolve any problems you might face:
Shock Bottoming Out
If the shock bottoms out during aggressive rides, check the following:
- Compression Settings: Ensure the high-speed and low-speed compression settings are properly tuned for your riding style and terrain.
- Sag: Verify that the air pressure is set correctly for your weight and riding conditions. Insufficient air pressure may lead to excessive sag, which can cause the shock to bottom out.
Excessive Bouncing or “Packing Down”
If the shock feels bouncy or doesn’t return to its original position, adjust the rebound damping:
- Rebound Damping: If the shock is too fast in returning, increase the rebound damping by turning the knob clockwise. A slower rebound might be necessary for heavier riders or rougher conditions.
Noisy Shock
If the shock is making unusual noises such as squeaking or clunking, it may be due to a lack of lubrication or worn seals. Clean the shock and lubricate the seals with a recommended lubricant. If the noise persists, inspect the shock for any visible damage.
Customizing Your TTX22M Trunnion Rear Shock for Optimal Performance
Customization allows you to fine-tune your TTX22M Trunnion rear shock for your specific needs. Here are a few advanced tuning options to optimize your suspension setup:
Adjusting Volume Spacers
Volume spacers can be added or removed to change the shock’s progression, offering either more or less ramp-up as the shock compresses. If you find that the shock feels too linear, adding a volume spacer can increase the progression and prevent bottoming out.
Fine-Tuning Compression and Rebound
For more aggressive riding, increasing compression damping on the high-speed setting can help with impacts from jumps and drops. If you’re riding technical terrain, softer settings on the low-speed compression can provide a smoother, more controlled ride. Additionally, fine-tuning rebound damping ensures that the shock reacts appropriately to your riding style, avoiding bouncing or sluggish performance.
Compatibility with Other Drivetrain Components
The Öhlins TTX22M Trunnion rear shock is compatible with a variety of frames and drivetrain systems, but it is important to ensure proper integration for optimal performance. Check your bike’s specifications for compatibility with trunnion-style shocks, and always verify that your frame supports the correct shock size and mounting type.
Frame Compatibility
The TTX22M Trunnion shock is specifically designed for frames with a trunnion mount. Ensure that your frame is compatible with the TTX22M before purchasing to avoid installation issues.
Drivetrain Integration
While the TTX22M Trunnion rear shock is not directly linked to your bike’s drivetrain, it works best when paired with a well-adjusted drivetrain. Ensure your chain, cassette, and derailleur are properly maintained and in good condition for the smoothest performance. A poorly adjusted drivetrain can lead to unnecessary stress on the shock during hard pedaling or rough terrain.
Conclusion
The Öhlins TTX22M Trunnion rear shock is a top-tier upgrade for riders who want to maximize their bike’s performance. By following the installation, adjustment, maintenance, and troubleshooting steps outlined in this guide, you’ll ensure that your shock performs at its best. With the right customization and care, the TTX22M Trunnion will enhance your ride, providing better comfort, control, and durability across all types of terrain.