The Storia V3 Trunnion [paid link] rear shock from EXT is a high-performance suspension component designed to offer exceptional damping and responsiveness for aggressive riders. Rebuilding your Storia V3 Trunnion [paid link] rear shock at home can save time and money while ensuring your shock remains in top condition. This guide will walk you through the necessary steps to rebuild your rear shock, troubleshoot common issues, and optimize it for performance.
Tools Required
- 8mm Allen wrench [paid link]
- Torque wrench [paid link]
- Small flathead screwdriver
- 2.5mm and 3mm Allen keys [paid link]
- Shock pump
- Clean, lint-free cloth
- Hydraulic oil (specific to Storia V3 [paid link] Trunnion)
- O-ring grease
- Replacement seals (if necessary)
- Rubber mallet
- External spring removal tool
- Seal driver (if replacing seals)
- Bench vise with soft jaws
Disassembling the Storia V3 Trunnion Rear Shock
Step 1: Remove the Shock from the Bike Frame
To begin, carefully remove the Storia V3 [paid link] Trunnion rear shock from your bike frame. Use the appropriate tools to loosen and remove the mounting bolts. Keep the bolts safe, as you will need them for reinstallation. Support the shock to prevent damage while performing the rebuild.
Step 2: Detach the Spring
Use the external spring removal tool to safely remove the shock’s coil spring. If your model uses air pressure instead of a coil spring, you can skip this step. Compress the shock and unscrew the end cap to release the pressure. Take care not to damage the shock body during this process.
Step 3: Remove the Damper Cartridge
Next, remove the damper cartridge from the shock body. Use the 8mm Allen wrench [paid link] to unscrew the damper assembly from the main shock body. Take extra care when pulling the damper out to avoid damaging the internal components. Keep the shock body upright to prevent the hydraulic oil from spilling.
Step 4: Remove the Seals and Internal Components
With the damper cartridge removed, it’s time to take apart the internal seals. Use a small flathead screwdriver to gently pry off the seals, making sure not to scratch the surfaces inside the shock body. If you are replacing the seals, carefully inspect the old ones for wear and tear, noting any cracks or damage.
Cleaning and Inspection
Step 5: Clean the Shock Body and Internal Components
Once the shock is disassembled, thoroughly clean all the parts with a clean, lint-free cloth. Pay particular attention to the shock body, damper cartridge, and piston assembly. Clean the seals gently, ensuring there is no dirt or debris remaining. Do not use harsh chemicals, as they may damage the shock’s components.
Step 6: Inspect for Wear and Damage
Carefully inspect all parts for signs of wear or damage. Look for nicks, dents, or excessive wear on the shock shaft and piston assembly. If any of the parts appear damaged, it’s crucial to replace them before reassembling the shock to maintain performance. Inspect the seals and O-rings for cracks, ensuring they are intact and pliable.
Rebuilding the Storia V3 Trunnion Rear Shock
Step 7: Replace the Seals and O-rings
If necessary, replace any worn seals or O-rings with fresh ones. Lubricate the new seals and O-rings with O-ring grease to ensure proper function and prevent damage during reassembly. Use a seal driver to install the seals into the shock body, making sure they are seated correctly.
Step 8: Reinstall the Damper Cartridge
Once the seals are in place, carefully reinstall the damper cartridge into the shock body. Tighten the damper assembly using an 8mm Allen wrench. Ensure the cartridge is properly aligned and that no debris is trapped between the cartridge and the shock body.
Step 9: Install the Coil Spring (if applicable)
If your Storia V3 Trunnion uses a coil spring, now is the time to reinstall it. Slide the coil spring back onto the shock shaft and tighten the end cap securely using the external spring tool. Ensure that the spring is properly seated to avoid any damage during use.
Step 10: Reassemble the Shock
Now that the internals are reassembled, it’s time to close up the shock. Carefully slide the damper assembly back into the shock body, aligning it with the mounting points. Tighten all bolts with a torque wrench [paid link] to ensure proper tension without over-tightening. Refer to the manufacturer’s torque specifications for accurate values.
Setting Up and Testing the Rebuilt Shock
Step 11: Reinstall the Shock onto the Bike
Once the shock is fully rebuilt, reinstall it onto your bike frame. Secure the mounting bolts and ensure the shock is correctly aligned. Use the torque wrench to tighten the bolts to the proper specifications, avoiding over-tightening, which can damage the frame or shock.
Step 12: Adjust the Shock Pressure and Settings
Before taking the bike for a ride, adjust the air pressure or spring tension according to your weight, riding style, and preferences. Use a shock pump to adjust the air pressure if your model uses air spring. If it uses a coil, adjust the preload as needed.
Step 13: Test Ride and Fine-Tune
Take the bike for a short test ride to evaluate the shock’s performance. Pay attention to any unusual noises, leaks, or irregular damping behavior. Fine-tune the shock settings, including compression and rebound, to match your riding style and terrain preferences.
Troubleshooting Common Issues
Issue 1: Shock Not Returning Properly
If the shock does not return to its full position, check for any issues with the damper cartridge or internal seals. Ensure that the damper assembly is properly installed and that the seals are intact. Low oil levels or damaged seals can lead to poor performance.
Issue 2: Oil Leaks
Leaks are often caused by worn seals or improperly tightened bolts. Inspect all seals and O-rings for signs of wear. Tighten all bolts to the manufacturer’s torque specifications, ensuring no air or oil can escape [paid link]. Replace any seals showing signs of damage.
Issue 3: Poor Damping Performance
If you notice poor damping performance, the issue may lie with the damper assembly or oil levels. Check the damper for any internal damage and ensure the correct oil is used for the Storia V3 Trunnion. If the damping is still subpar, consider servicing or replacing the damper.
Customization and Optimization
Fine-Tuning Rebound and Compression Settings
One of the benefits of the Storia V3 Trunnion rear shock is its ability to be finely tuned for optimal performance. Adjusting the rebound and compression settings allows you to tailor the shock’s performance for different terrains and riding styles. Start with the manufacturer’s recommended settings, then make adjustments based on your personal preference and riding conditions.
Upgrading the Spring Rate
For riders who require a more aggressive setup, consider upgrading the spring rate to match your weight and riding style. This can help with bottoming-out resistance and overall suspension performance. Make sure to choose a spring that matches the specifications of the Storia V3 Trunnion.
Comparison with Similar Models
While the Storia V3 Trunnion rear shock offers exceptional performance, other models like the Fox Float X2 or RockShox Super Deluxe may offer different benefits, such as specific tuning options or more advanced compression features. The Storia V3 Trunnion is known for its precise damping control and smooth travel, making it a top choice for riders seeking reliable performance in technical and aggressive riding environments.
Compatibility with Other Drivetrain Components
The Storia V3 Trunnion rear shock is designed to be compatible with a wide range of bike frames and drivetrain components. However, it’s essential to ensure that the shock is the correct size for your frame, as well as ensuring that the shock’s performance characteristics complement your bike’s overall geometry and setup. Compatibility with rear linkage and other suspension components should also be verified to ensure the shock functions optimally.
By following the steps outlined in this guide, you can successfully rebuild your Storia V3 Trunnion rear shock at home. Regular maintenance and timely rebuilds are essential for maintaining peak [paid link] performance and extending the lifespan of your shock.