The TTX2Air rear shock from Öhlins is an advanced piece of suspension technology designed for serious riders who seek optimal performance on a variety of terrains. Regular maintenance and proper servicing are essential to ensure the longevity and performance of this high-end shock. In this guide, we will walk you through the steps required for installation, adjustment, maintenance, troubleshooting, and optimization of the TTX2Air rear shock, so you can keep your ride smooth and responsive.
Tools Required
To service the TTX2Air rear shock, the following tools are necessary:
- 8mm hex wrench
- 10mm hex wrench
- Torque wrench [paid link]
- 3mm and 5mm Allen keys [paid link]
- Spanner wrench
- Shock pump (for air pressure adjustments)
- Seal driver (specific for Öhlins models)
- Cleaning supplies (brush, degreaser, microfiber cloth)
- Replacement seals and O-rings
- Suspension fluid (Öhlins recommended fluid)
Installation of the TTX2Air Rear Shock
Step 1: Prepare the Bike
Start by ensuring your bike is securely mounted on a stand. This will allow for easy access to the rear shock and provide stability during installation. Remove the old shock if necessary, paying close attention to any parts that may need replacing.
Step 2: Remove the Old Shock (If Applicable)
Using an 8mm and 10mm hex wrench, remove the bolts securing the old shock to the frame and the rear triangle. Be sure to support the rear triangle to avoid damage while removing the shock. Keep track of the washers and bushings that are installed.
Step 3: Install the TTX2Air Rear Shock
Align the TTX2Air shock with the mounting points on the frame and rear triangle. Slide the shock into place and secure it using the appropriate bolts and washers. Tighten the bolts to the manufacturer’s recommended torque specifications. Ensure the shock is mounted securely and does not move.
Step 4: Set Air Pressure
Before riding, it is crucial to set the correct air pressure in the shock. Use a shock pump to adjust the air pressure based on your rider weight and desired suspension performance. Refer to the manufacturer’s guidelines for the appropriate air pressure range for your weight.
Adjustment of the TTX2Air Rear Shock
Compression and Rebound Settings
The TTX2Air shock allows for fine-tuning of compression and rebound settings to suit different riding styles and terrain. Adjusting these settings properly can significantly enhance the performance of the shock.
- Compression Adjustment: The TTX2Air features a high- and low-speed compression adjustment. High-speed compression affects the shock’s response to sudden impacts, while low-speed compression affects the shock’s behavior under slower, more sustained loads. Start with a mid-range setting and make small adjustments based on your riding preferences.
- Rebound Adjustment: The rebound adjuster controls how quickly the shock returns to its original position after compression. A fast rebound may cause the shock to “buck” or feel unstable, while a slow rebound may make the shock feel sluggish. Adjust it to a medium setting and tweak it based on your feedback during rides.
Air Volume Adjustments
The TTX2Air rear shock has adjustable air volume spacers that help control the progression of the suspension curve. Adding or removing spacers will alter how the shock behaves at the end of its stroke. A smaller air volume will increase bottom-out resistance, while a larger air volume will make the shock feel more progressive. Choose the correct volume spacer setup based on the type of riding you plan to do.
Maintenance of the TTX2Air Rear Shock
Cleaning and Inspection
To ensure the TTX2Air performs at its best, it’s important to clean it after every ride, especially if you’ve been riding in muddy or dusty conditions.
- Clean the Shock: Use a soft brush to remove dirt and debris. Avoid using harsh chemicals that could damage the shock’s seals. A mild degreaser and water should suffice.
- Inspect the Seals: Check the seals for any visible damage or wear. Over time, seals may degrade, affecting the performance and efficiency of the shock. If you notice any issues, replace the seals immediately.
Regular Oil Change
Suspension fluid should be replaced periodically to maintain optimal performance. Follow the manufacturer’s recommendations for the intervals at which fluid should be changed, but generally, every 50-100 hours of use is a good guideline.
- Drain the Old Oil: Remove the shock from the bike and disassemble the shock body. Drain the old suspension fluid into a container.
- Clean Internals: Use a clean microfiber cloth to wipe down the internals of the shock. Ensure no dirt or old oil remains inside the shock.
- Reassemble and Refill: Reassemble the shock, taking care to replace any worn O-rings or seals. Refill the shock with fresh suspension fluid and ensure the fluid level is correct according to the manufacturer’s specifications.
Troubleshooting Common Set-Up Issues
Issue 1: Lack of Rebound Control
If you feel that the shock is not rebounding properly or too quickly, it could be due to low oil levels or contamination inside the shock. Perform a full oil change and inspect the rebound settings. Ensure the correct fluid levels are maintained.
Issue 2: Insufficient Compression
If the shock feels too soft or bottoms out too easily, it could be a result of incorrect air pressure or an issue with the compression damping. Verify the air pressure settings and adjust the compression damping controls. If the problem persists, inspect the internal components for damage.
Issue 3: Noisy Shock
A noisy shock can indicate a lack of lubrication or an issue with the seals. Clean and lubricate the shock, paying attention to the seals and bushings. If the noise continues, inspect for any internal damage or worn parts that may need replacing.
Customization and Optimization
Air Pressure Tuning
The TTX2Air rear shock is highly customizable through air pressure adjustments. Riders can fine-tune the shock’s feel by increasing or decreasing air pressure to match specific riding styles. For instance, a heavier rider may require a higher air pressure to prevent bottoming out, while a lighter rider may need a lower pressure to enhance plushness and comfort.
Volume Spacers
As mentioned, adjusting the air volume spacers changes the progression of the shock. For riders seeking a more linear feel, fewer spacers will create a smoother transition. For aggressive riders who prefer more bottom-out resistance, adding spacers will help to achieve that. Experiment with different configurations based on your riding preferences and terrain.
Comparison with Similar Models
While the TTX2Air rear shock is renowned for its performance and adjustability, it is worth comparing it with similar models on the market, such as the Fox Float X2 or the RockShox Super Deluxe. Both of these shocks offer comparable adjustability, but the TTX2Air’s dual-tube design allows for superior damping performance, especially on technical terrain.
- Fox Float X2: Known for its simplicity and performance, the X2 is a solid choice for riders seeking a more straightforward set-up. However, the TTX2Air offers more customization options for those looking to fine-tune their suspension.
- RockShox Super Deluxe: Another competitor in the high-end shock category, the Super Deluxe is similar in terms of features but generally provides a slightly more progressive feel. The TTX2Air, on the other hand, offers a more plush and smooth ride due to its dual-tube damping system.
Compatibility with Other Drivetrain Components
The TTX2Air rear shock is designed to work seamlessly with modern mountain bike frames and drivetrains. However, it’s important to check compatibility with your specific bike model. The shock’s dimensions and mounting hardware must be compatible with the rear triangle and frame. Additionally, the shock’s performance may be influenced by the bike’s geometry and overall suspension design.
Ensure that the shock’s stroke length, eye-to-eye measurement, and mounting hardware match the requirements of your bike. If you’re uncertain, consult the manufacturer’s specifications for compatibility details.