How to Service Your ElevenSix Trunnion Rear Shock Without a Mechanic

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Maintaining your ElevenSix Trunnion [paid link] rear shock can extend its lifespan, enhance performance, and provide a smoother riding experience. Servicing this shock is not as difficult as it may seem, and with the right tools and knowledge, you can perform the service yourself without the need for a professional mechanic. This guide will walk you through the entire process, from installation to troubleshooting and optimization for performance.

Tools Required

  • Push Industries ElevenSix Trunnion [paid link] rear shock
  • Shock pump
  • Torque wrench [paid link]
  • 2.5mm, 3mm, and 5mm Allen wrenches [paid link]
  • T25 Torx wrench [paid link]
  • 7mm spanner wrench
  • 30mm shock shaft nut tool
  • Silicone grease
  • Isopropyl alcohol
  • Cleaning rags
  • Oil and seal kits (specific to ElevenSix Trunnion model)
  • Sealant tool (optional)

Disassembly of the ElevenSix Trunnion Rear Shock

Before you begin the servicing process, ensure that your bike is secure, and the shock is removed. Follow these steps for disassembly:

  1. Remove the Shock from the Frame
    • Use a 5mm Allen wrench [paid link] to remove the bolts securing the shock to the frame.
    • Carefully remove the shock, ensuring no debris enters the shock body during the process.
  2. Disassemble the Shock
    • Using the 30mm shock shaft nut tool, remove the shaft nut. This will allow you to separate the damper from the shock body.
    • Gently slide the damper assembly out, ensuring not to damage any components during removal.
  3. Clean the Shock Body
    • Use a clean rag soaked in isopropyl alcohol to wipe down the shock body and remove any dirt, debris, or old grease. This ensures a clean workspace for reassembly.

Servicing the Shock Components

Servicing the ElevenSix Trunnion rear shock involves inspecting and replacing key components like seals, oils, and lubricants. This process ensures smooth operation and long-term durability.

  1. Inspect the Shock Shaft
    • Check the shock shaft for any visible damage or wear. Small scratches can degrade seal performance, so if you find any, consider replacing the shock shaft or consulting a professional.
  2. Replace the Oil
    • Drain the old oil from the shock body and damper assembly by tilting the shock over a container to collect the used oil.
    • Fill the shock body with fresh oil, making sure to use oil compatible with the ElevenSix Trunnion model. Push Industries recommends using their specific shock fluid to ensure proper viscosity and damping performance.
  3. Lubricate the Seals
    • Apply a thin layer of silicone grease to the seals and bushings. This will keep the seals supple and reduce friction during operation.
    • Be cautious not to over-apply grease, as excess lubricant can attract dirt and cause excessive wear.
  4. Replace the Seals and O-rings
    • Check the seals and O-rings for signs of wear, such as cracks or tears. If necessary, replace the old seals with a new kit designed for the ElevenSix Trunnion model.
    • To remove the seals, use a sealant tool or a flathead screwdriver, being careful not to damage the seal groove. Once replaced, lubricate the new seals with a small amount of silicone grease.

Reassembly of the ElevenSix Trunnion Rear Shock

Once the servicing is complete, reassemble the shock step-by-step:

  1. Reassemble the Damper and Shock Body
    • Carefully insert the damper assembly back into the shock body, ensuring that all seals and O-rings are properly seated.
    • Tighten the shock shaft nut with the 30mm shock shaft nut tool. Make sure it’s securely tightened to the manufacturer’s recommended torque value.
  2. Check and Adjust the Air Pressure
    • Use a shock pump to set the correct air pressure for your rider weight and riding style. Ensure the shock is properly inflated for optimal performance.
    • Check the air pressure regularly to ensure it remains consistent.
  3. Reattach the Shock to the Frame
    • Secure the shock back into the frame using the appropriate bolts and tighten them with a torque wrench [paid link] to the specified torque values.

Adjusting the ElevenSix Trunnion Rear Shock

To achieve the best performance from your ElevenSix Trunnion rear shock, it’s crucial to fine-tune the settings to your riding preferences. Here’s how to adjust the shock for optimal performance:

  1. Adjust Compression and Rebound Settings
    • The ElevenSix Trunnion rear shock comes with both compression and rebound adjustment knobs. Set the compression to your desired firmness, based on your riding style, and adjust the rebound to control how quickly the shock returns after compression.
  2. Test the Shock
    • After making adjustments, take the bike for a test ride to evaluate the shock’s performance. Make additional adjustments as necessary based on your comfort and handling preferences.
  3. Check for Leaks
    • After reassembly, check the shock for any leaks. If you notice any oil leakage or air pressure loss, it may indicate that a seal has been improperly installed or the shock needs further maintenance.

Troubleshooting Common Issues

Even after servicing, some issues may arise with the ElevenSix Trunnion rear shock. Here’s how to troubleshoot common problems:

  1. Shock is Too Soft or Too Hard
    • If the shock feels too soft or too firm, first check the air pressure. If the pressure is correct, adjust the compression settings to suit your needs.
  2. Excessive Rebound or Slow Return
    • If the shock rebounds too quickly or too slowly, adjust the rebound knob to fine-tune the shock’s return speed.
  3. Leaking Oil or Air
    • If you notice oil or air leakage, it’s likely due to worn-out seals or improper reassembly. Inspect the seals and replace them if necessary.

Customization and Optimization for Better Performance

To get the most out of your ElevenSix Trunnion rear shock, consider these performance optimizations:

  1. Experiment with Air Pressure
    • Adjusting the air pressure can significantly affect the ride quality. A higher pressure may make the ride stiffer and more responsive, while lower pressure provides more comfort and compliance.
  2. Tune Compression and Rebound to Riding Conditions
    • For aggressive trail riding, stiffen the compression to prevent bottoming out. Conversely, for smoother rides, soften the compression to enhance comfort. Tailoring rebound adjustments to the terrain will also improve the overall shock response.
  3. Upgrade to High-Performance Seals
    • If you’re looking for maximum durability and performance, consider upgrading to high-end seals that offer lower friction and greater longevity.

Comparison with Similar Models

The ElevenSix Trunnion rear shock stands out in the market for its adjustable high-performance features, but it’s important to compare it with other models to determine if it’s the best fit for your bike.

  1. Fox Float X2
    • Compared to the ElevenSix Trunnion, the Fox Float X2 has similar adjustability but is often seen as slightly less responsive to small bump compliance, which makes the ElevenSix a better choice for riders seeking a smoother, more controlled ride over rough terrain.
  2. RockShox Super Deluxe
    • The RockShox Super Deluxe is another top competitor, offering a different damping configuration. While the Super Deluxe excels in high-speed stability, the ElevenSix Trunnion shines in its fine-tuned adjustability for both low and high-speed compression and rebound.

Compatibility with Other Drivetrain Components

When servicing the ElevenSix Trunnion rear shock, ensure that it is compatible with the rest of your bike’s drivetrain and suspension components. The shock is designed to work with most modern mountain bike frames, especially those designed with trunnion-mount systems. Always check the shock’s specifications to confirm compatibility with your bike’s suspension design.