The Öhlins TTXAir 2.1 rear shock is a top-tier, high-performance suspension component designed for advanced riders and racers who demand precision, durability, and responsiveness. Regular maintenance of your TTXAir 2.1 is essential to ensure its peak performance, longevity, and smooth operation. This guide will walk you through the essential steps for installation, adjustment, troubleshooting, and optimization of your TTXAir 2.1 rear shock, ensuring that you can get the most out of your suspension system.

Tools Required

To perform maintenance on the Öhlins TTXAir 2.1 rear shock, you will need the following tools:

• Torque wrench [paid link] (with appropriate socket sizes)
• 5mm and 6mm Allen wrenches [paid link]
• A shock pump (for air pressure adjustments)
• Suspension fluid (Öhlins recommended fluid or equivalent)
• Cleaning supplies (mild detergent, microfiber cloths, and water)
• Oil syringe or dropper for adding suspension fluid
• Adjustable spanner wrench (for preload adjustments)
• O-ring grease (for the shock’s seals)

Installation of the TTXAir 2.1 Rear Shock

Before installing the TTXAir 2.1 rear shock, ensure that your bike frame is compatible with the shock. Check the frame’s mounting points to confirm that they match the shock’s dimensions and mounting hardware. Installation is straightforward if done correctly, but following each step carefully is essential to avoid damage to the shock or bike frame.

Step 1: Remove the Old Shock

• Use a 5mm Allen wrench [paid link] to remove the fasteners that hold the existing rear shock in place.
• Carefully slide the old shock out of the frame, taking note of any spacers or washers used in the mounting process.

Step 2: Prepare the TTXAir 2.1 Rear Shock

• Ensure the TTXAir 2.1 is set to its correct pressure. Use a shock pump to set the air pressure according to your rider weight and intended riding style. The recommended air pressure range is usually noted on the shock’s body.
• Confirm that all seals, washers, and bushings are properly installed on the shock to avoid any installation issues.

Step 3: Install the TTXAir 2.1 Rear Shock

• Slide the TTXAir 2.1 into the frame, aligning the eyelet or mounting hardware with the frame’s mounting points.
• Tighten the fasteners with a torque wrench [paid link] to the manufacturer’s recommended torque settings (usually around 20-30 Nm). Be careful not to overtighten, as this can damage the shock or the frame.

Step 4: Perform Initial Adjustments

• Once installed, use the preload adjustment to set the shock’s sag based on your weight and riding preferences.
• Double-check all bolts and fasteners for tightness before proceeding with further adjustments or riding.

Adjustment of the TTXAir 2.1 Rear Shock

The TTXAir 2.1 rear shock offers multiple adjustment options that allow you to tailor the shock to your specific needs. Proper adjustment ensures that your bike handles as intended and performs optimally during rides.

Air Pressure Adjustment

The air pressure in your TTXAir 2.1 rear shock plays a crucial role in determining the overall feel and performance. A higher air pressure provides more support for heavier riders, while a lower pressure offers a more plush feel for lighter riders.

1. Use the shock pump to adjust the air pressure.
2. Refer to the recommended air pressure chart provided by Öhlins for your specific weight and riding style.
3. After making adjustments, compress the shock to ensure the correct air pressure is maintained.

Rebound Damping

Rebound damping controls the rate at which the shock extends after compression. Adjusting the rebound damping helps fine-tune the shock’s response to impacts and terrain changes.

1. Locate the rebound adjuster knob, typically located at the bottom of the shock.
2. Turn the knob clockwise for slower rebound or counterclockwise for faster rebound.
3. Make small adjustments, testing the shock after each change to ensure optimal performance.

Compression Damping

Compression damping affects how the shock reacts to impacts and terrain changes, controlling the shock’s resistance to compression.

1. The compression adjustment knob is usually located on the body of the shock, near the top or side.
2. Turn the knob clockwise to increase compression damping, which provides more support on rough terrain.
3. Turn the knob counterclockwise for a softer, more compliant feel.

Preload Adjustment

Preload adjustment determines the amount of initial sag in the shock and affects how the shock behaves under load.

1. Use an adjustable spanner wrench to turn the preload ring at the top of the shock.
2. Adjust the preload to achieve the correct sag, typically around 25-30% of the shock’s total travel.
3. Ensure that the shock feels balanced and responsive once preload is set correctly.

Maintenance of the TTXAir 2.1 Rear Shock

Proper maintenance is essential for ensuring the longevity and performance of your Öhlins TTXAir 2.1 rear shock. Regular servicing keeps the internal components functioning smoothly, minimizing the risk of premature wear or failure.

Cleaning and Lubing

• After each ride, clean the shock body using a microfiber cloth and mild detergent. Remove dirt, debris, and moisture from the shock body to avoid seal damage.
• Lubricate the shock’s seals with a small amount of O-ring grease to keep them in good condition and prevent them from drying out.

Suspension Fluid Service

Over time, the suspension fluid inside the shock can degrade, affecting performance. Öhlins recommends performing a suspension fluid change every 50-100 hours of riding.

1. Use a syringe or dropper to remove old fluid from the shock’s damping reservoir.
2. Refill the reservoir with the recommended Öhlins suspension fluid, ensuring it is at the correct level.
3. Carefully reinstall the shock’s damper cap and tighten it to the recommended torque specification.

Checking for Leaks

Check for air or fluid leaks around the shock’s seals after each ride. If you notice any leakage, replace the damaged seals immediately to prevent further damage to the shock.

Troubleshooting Common Set-Up Issues

Even with the best rear shocks, issues can arise from improper setup or external factors. Below are some common problems riders face with the TTXAir 2.1 and how to fix them.

Issue: No Suspension Travel

If you notice that the rear shock is not compressing or extending properly, the air pressure may be too high. Reduce the air pressure by 5-10 psi at a time and test the shock’s movement until proper travel is restored.

Issue: Harsh Ride or Bottoming Out

A harsh ride or frequent bottoming out often occurs when the air pressure is too low or compression damping is insufficient. Increase the air pressure or adjust the compression settings to improve performance.

Issue: Leaking Shock

If you notice fluid or air leakage, inspect the seals for damage or wear. Replace any damaged seals and ensure all fasteners are tightened to the proper torque specification. If leakage persists, the shock may need to be serviced by a professional.

Customization and Optimization

To further enhance the performance of the TTXAir 2.1 rear shock, consider customizing the shock’s settings to match your riding style and terrain preferences. Riders seeking a more plush ride may prefer softer compression and rebound settings, while those racing or riding technical terrain may benefit from stiffer settings for more control.

Experiment with different settings, making small adjustments after each ride to find the ideal balance between comfort and performance. Additionally, pairing the TTXAir 2.1 with compatible components, such as an adjustable air fork and matching wheelset, will help optimize the overall suspension system.

Compatibility with Other Drivetrain Components

The TTXAir 2.1 rear shock is compatible with a wide range of mountain bike frames and drivetrain components. However, it is essential to confirm that your bike frame supports the specific dimensions and mounting standards of the TTXAir 2.1.

When pairing your TTXAir 2.1 with other suspension components or drivetrain parts, ensure that the components are designed to work together. For example, if you are upgrading your suspension to a more advanced model like the TTXAir 2.1, ensure that the frame is compatible with the increased travel and damping features.

In conclusion, proper installation, adjustment, maintenance, and troubleshooting of the TTXAir 2.1 rear shock are essential for ensuring a smooth and optimized riding experience. By following these guidelines, you will keep your rear shock performing at its best, providing you with the control and comfort needed to tackle any terrain.