The TTX2Air from Öhlins is a rear shock designed to offer exceptional performance, precision, and comfort for high-performance cyclists. Engineered for both competitive riders and enthusiasts, this shock utilizes advanced technology and superior craftsmanship to enhance ride quality across a variety of conditions. This guide will cover everything you need to know about the TTX2Air, including its installation, adjustment, maintenance, troubleshooting, and performance optimization.

Installation of the TTX2Air Rear Shock

Before installing the TTX2Air rear shock, ensure that you have the correct tools and the shock is compatible with your bike frame. The installation process is straightforward, but attention to detail is crucial to ensure optimal performance.

Tools Required:

• Torque wrench [paid link]
• 5mm and 6mm Allen wrenches [paid link]
• Shock pump
• Lubricant for mounting hardware
• Suspension grease

Steps for Installation:

1. Prepare the Bike Frame: Begin by cleaning the rear triangle of your bike to remove any dirt or debris that could interfere with the shock installation.
2. Remove the Old Shock: Use the 5mm and 6mm Allen wrenches [paid link] to remove the bolts securing the previous shock. If you’re replacing an older shock, make sure the mounting hardware is still in good condition for re-use.
3. Lubricate the Mounting Hardware: Apply a small amount of suspension grease or lubricant to the mounting hardware to reduce friction and ensure smooth installation.
4. Install the TTX2Air Shock: Position the TTX2Air shock into the bike’s rear triangle. Align the eyelet and mount with the frame’s shock mounts.
5. Secure the Bolts: Insert the bolts and tighten them using a torque wrench [paid link]. Refer to the specific torque specifications provided by Öhlins to avoid over-tightening or under-tightening.
6. Check for Proper Movement: Gently compress the shock by hand to ensure it moves freely and that the mounting bolts are correctly secured.

Adjusting the TTX2Air Rear Shock

The TTX2Air rear shock offers a wide range of adjustments, allowing riders to fine-tune their suspension for different terrains and riding styles. The key adjustments available include air spring pressure, rebound damping, and compression damping.

Air Spring Pressure Adjustment:

The TTX2Air uses an air spring that can be adjusted to accommodate different rider weights and preferences.

• Set Initial Pressure: Using a shock pump, adjust the air pressure according to your body weight. Refer to the Öhlins guidelines for recommended starting points based on weight.
• Test Ride and Fine-Tune: After setting the initial pressure, take the bike for a test ride. If you feel excessive bottoming out or harshness, reduce the pressure slightly. If the suspension feels too soft, increase the pressure.

Rebound Damping:

Rebound damping controls the speed at which the shock returns to its original position after compression. Too much rebound damping can cause a harsh ride, while too little can result in instability.

• Adjust Rebound: Locate the rebound adjuster at the bottom of the shock and turn it clockwise to slow the rebound or counterclockwise to speed it up. Start with the factory setting and adjust based on personal preference.

Compression Damping:

Compression damping regulates how the shock compresses under load. The TTX2Air offers both high-speed and low-speed compression adjustments.

• Low-Speed Compression: Adjust low-speed compression for small, repetitive bumps such as those encountered on technical trails. Turn the dial to the right to increase compression damping for a firmer feel.
• High-Speed Compression: High-speed compression adjusts for larger impacts, like drops or big hits. Start with the default setting and adjust based on the terrain you ride most often.

Maintenance of the TTX2Air Rear Shock

Routine maintenance is essential to keep the TTX2Air in top condition, ensuring that it performs optimally throughout its lifespan.

Regular Cleaning:

• Frequency: After every ride, clean the shock body with a damp cloth to remove dirt, mud, and debris.
• Focus Areas: Pay particular attention to the shock’s seals and mount points to ensure they remain free of contaminants that could cause wear or damage.

Air Spring Maintenance:

• Check Air Pressure: Over time, air pressure can fluctuate, so it’s essential to check the pressure regularly, especially if you notice a change in ride feel. If you’ve recently adjusted the shock, perform a full air pressure check.
• Replenish Lubrication: Apply a small amount of suspension grease around the seals to ensure smooth operation.

Rebound and Compression Damping:

• Check for Leaks: Examine the rebound and compression adjusters for any signs of leakage or wear. If the damping settings feel inconsistent, it might be a sign that internal servicing is needed.
• Service Interval: Depending on usage, the shock should be serviced every 50-100 hours of riding. This will include a full teardown, cleaning, and oil replacement to maintain the shock’s performance.

Troubleshooting Common Set-Up Issues

Despite its robust design, there may be occasional issues with the TTX2Air rear shock. Here are some common problems and how to resolve them.

1. Excessive Sag:

• Problem: If the shock sags too much under your body weight, it may feel bottomed out or unstable.
• Solution: Check the air spring pressure. If the pressure is too low, increase it incrementally to bring the shock into the optimal range for your weight.

2. Harsh Ride or Bottoming Out:

• Problem: If the shock feels too harsh or bottoms out on larger hits, the compression damping might need adjustment.
• Solution: Increase the compression damping or add more air to the spring. Try adjusting the low-speed compression for smaller bumps and high-speed compression for larger impacts.

3. Sluggish Rebound:

• Problem: If the shock feels sluggish or doesn’t return quickly after compression, the rebound damping may be too slow.
• Solution: Adjust the rebound damping dial to a faster setting by turning it counterclockwise. Test again after each adjustment.

Customization and Optimization for Better Performance

To get the most out of the TTX2Air rear shock, riders can fine-tune several factors to optimize performance.

Tune for Terrain:

• Smooth Trails: If you’re riding on smoother, less technical trails, increase air pressure slightly to reduce sag and improve efficiency.
• Rough, Technical Trails: On rougher terrain, reduce the air pressure a bit for more compliance and better traction over bumps. Adjust the rebound damping to ensure the shock reacts quickly enough for the terrain.

Rider Weight and Riding Style:

• Heavy Riders: Heavier riders may need to run higher air pressure to prevent excessive sag, while also using firmer compression damping settings to avoid bottoming out.
• Light Riders: Lighter riders can benefit from lower air pressure, which increases comfort and allows for better suspension compliance.

Comparison with Similar Models

The TTX2Air rear shock stands out due to its advanced air spring design and precision damping controls, offering superior ride quality compared to traditional coil shocks or other air shocks on the market.

Key Advantages:

• Air Spring Design: The TTX2Air uses an air spring, which offers a more adjustable and lighter alternative to coil springs. This provides riders with the ability to fine-tune their suspension to a greater extent.
• Damping Precision: The dual compression damping (high-speed and low-speed) on the TTX2Air gives riders more control over suspension settings, making it ideal for varying terrain.

Compared to Other Air Shocks:

• Many air shocks tend to compromise on either comfort or precision. The TTX2Air, with its high-quality internals and Öhlins’ extensive tuning options, ensures that you get the best of both worlds — comfort on rough terrain and high performance in racing conditions.

Understanding Compatibility with Other Drivetrain Components

The TTX2Air rear shock is compatible with a variety of drivetrain components, but it’s essential to consider the overall suspension design of your bike when choosing a rear shock.

Drivetrain Considerations:

• Rear Triangle Geometry: Ensure that the rear shock’s stroke and mounting points are compatible with your bike’s geometry. Most modern bikes with standard 190mm or 200mm shock sizes will work with the TTX2Air, but always verify before purchase.
• Suspension Linkage: The linkage and shock design of your bike will impact the shock’s performance. Make sure the shock’s adjustment range aligns with your frame’s suspension design.