The Öhlins TTXAir 2.1 rear shock represents a significant advancement in mountain bike suspension technology, offering exceptional performance and comfort to riders. This high-end shock combines innovative features that contribute to improved ride quality, with an emphasis on versatility, adjustability, and durability. In this article, we will cover its installation, adjustment, maintenance, and troubleshooting, as well as how to customize the shock for optimized performance.

Overview of the TTXAir 2.1 Rear Shock

The TTXAir 2.1 rear shock is engineered to provide riders with a smoother, more controlled ride across various terrains. The shock is designed with Öhlins’ renowned twin-tube damping technology, which offers excellent responsiveness and increased consistency throughout the ride. Its ability to adapt to different riding conditions makes it ideal for both aggressive riders and those seeking a more comfortable ride.

Tools Required

• Shock pump
• 4mm and 5mm Allen wrenches [paid link]
• Torque wrench [paid link]
• T25 driver
• Spanner wrench (for the air canister)
• Grease (for hardware installation)
• Clean cloth (for maintenance)

Installation of the TTXAir 2.1 Rear Shock

Installing the Öhlins TTXAir 2.1 rear shock requires attention to detail to ensure optimal performance. Follow these steps for a correct installation process:

1. Remove the Existing Shock: If replacing a stock shock, start by detaching the old shock from the rear triangle. Use the appropriate Allen wrenches [paid link] to unscrew the mounting bolts.
2. Prepare the Mounting Hardware: Before installing the TTXAir 2.1, clean the mounting area thoroughly and apply a light coating of grease to prevent creaking and ensure smooth operation.
3. Install the TTXAir 2.1 Shock: Align the shock with the frame mounts, making sure that the mounting hardware fits correctly. Tighten the bolts to the manufacturer’s specified torque settings.
4. Check for Proper Fit: Ensure that the shock is installed with no interference from the frame. The shock should move freely within its travel range.

Once installed, the shock will require initial pressure setup.

Adjusting the TTXAir 2.1 Rear Shock

The TTXAir 2.1 offers multiple adjustment features that allow you to fine-tune the shock’s performance. These include air spring pressure, rebound, and compression damping adjustments. To achieve the best possible ride quality, follow these steps for setting up the shock:

Air Pressure Adjustment

1. Determine Your Rider Weight: Begin by determining your body weight, as this will guide you in setting the appropriate air pressure. Refer to the Öhlins pressure chart for recommended starting points based on your weight.
2. Set the Air Pressure: Using a shock pump, adjust the air pressure in the shock to match the recommended value. Make sure to set the pressure based on your weight and riding style.
3. Fine-Tune for Comfort: Adjust the air pressure further to fine-tune the shock’s performance. Too much air pressure can make the ride harsh, while too little can lead to bottoming out.

Rebound Adjustment

Rebound damping controls the speed at which the shock extends after compressing. Adjust the rebound to suit your riding style:

1. Set Rebound to Neutral: Start by setting the rebound adjuster to the midpoint. From here, you can increase or decrease the rebound speed.
2. Test and Fine-Tune: Ride the bike and observe the shock’s behavior. If the shock extends too quickly or bounces excessively, slow it down by turning the rebound adjuster clockwise. If the shock rebounds too slowly, increase the rebound speed by turning the adjuster counterclockwise.

Compression Damping Adjustment

The compression damping controls how much resistance the shock provides when compressed. The TTXAir 2.1 features separate adjustments for high and low-speed compression:

1. Set Initial Compression Settings: Begin with the low-speed compression adjuster in the mid-range and the high-speed compression adjuster at its lowest setting.
2. Test the Ride: Ride the bike on various terrains. Adjust the low-speed compression to make the shock more responsive to pedaling forces or more controlled during big hits. Adjust the high-speed compression for better control over larger impacts.

Maintenance of the TTXAir 2.1 Rear Shock

To ensure that the TTXAir 2.1 maintains its performance over time, regular maintenance is essential. The following steps outline the basic maintenance procedure:

1. Clean the Shock Regularly: Use a clean, soft cloth to wipe down the shock after every ride. This will remove dirt and debris that could cause wear or damage to the components.
2. Check for Leaks: Periodically inspect the shock for any signs of oil leakage. Leaks may indicate an issue with the seals or other internal components that need attention.
3. Repack the Air Canister: Over time, the air canister may require repacking. This involves removing the air canister, cleaning it, and replacing the internal seal to ensure a proper air-tight seal.
4. Service the Damper: Depending on usage, the damper may need servicing. This includes draining and replacing the oil, inspecting the internal components for wear, and replacing seals when necessary.

Öhlins recommends servicing the shock every 100-150 hours of riding or once a year, whichever comes first. For best results, consider having a professional technician service the shock to maintain its optimal performance.

Troubleshooting Common Issues with the TTXAir 2.1 Rear Shock

Even with regular maintenance, issues may arise. Below are some common problems and solutions:

Lack of Suspension Travel

If the shock feels like it’s not providing enough travel, check the following:

1. Air Pressure: Ensure that the air pressure is set according to your weight. If the pressure is too high, the shock will not compress fully.
2. Shock Compression Setting: If the compression damping is set too high, it may prevent the shock from reaching full travel. Reduce compression damping to allow for more movement.

Harsh Ride Quality

If the ride feels harsh, it may be due to improper air pressure or rebound settings:

1. Air Pressure: Ensure the air pressure is not too high. Lower the air pressure for a smoother ride.
2. Rebound Settings: If the rebound is too fast, the shock may feel uncomfortable. Adjust the rebound to a slower setting.

Noise from the Shock

If you hear any creaking or clicking noises from the shock, it may be a sign of loose hardware or dirty components:

1. Tighten Mounting Bolts: Check that the mounting bolts are tightened to the correct torque specifications.
2. Clean the Shock: Dirt buildup can lead to unwanted noises. Clean the shock thoroughly, especially around the bushings.

Customizing the TTXAir 2.1 Rear Shock for Better Performance

The TTXAir 2.1 rear shock is highly customizable, allowing you to tailor its performance to your specific riding style and terrain. To maximize your shock’s potential:

1. Adjust Air Pressure Based on Terrain: For smoother trails, lower the air pressure for increased comfort. For more aggressive riding, increase the air pressure for better support.
2. Tune Compression Settings: Fine-tune the compression settings to balance comfort and control. A firmer compression is ideal for aggressive riding on rough trails, while a softer setting offers better absorption on smooth, flowy rides.
3. Rebound for Optimal Control: Adjust the rebound speed to ensure the shock returns to its extended position quickly enough to maintain traction without feeling bouncy.

Compatibility with Other Drivetrain Components

The Öhlins TTXAir 2.1 is compatible with a wide range of drivetrain systems, including both 1x and 2x setups. It is essential to ensure that your shock’s performance is optimized in conjunction with the rest of your bike’s components:

1. Shock and Rear Derailleur Compatibility: Ensure that the shock’s travel range doesn’t interfere with the rear derailleur’s movement.
2. Chainstay and Shock Clearance: Check that the shock’s design allows for proper chainstay clearance, especially on full suspension bikes.

Comparison with Similar Models

When compared to other rear shocks in its category, the Öhlins TTXAir 2.1 stands out due to its innovative twin-tube damping design and separate compression adjustments. This model excels in providing both high-level comfort and control, especially in rough terrain. While other shocks may offer similar performance, the TTXAir 2.1’s superior build quality, range of adjustability, and ease of use make it a top choice for serious riders.