The Cane Creek DB Kitsuma Trunnion [paid link] rear shock is a premium component designed to offer riders an optimal combination of performance, durability, and adjustability. Whether you’re upgrading your bike or replacing an old shock, understanding how to install, adjust, maintain, and optimize the DB Kitsuma Trunnion [paid link] is essential for getting the most out of your suspension. This guide will walk you through all the necessary steps and provide troubleshooting advice for common issues to ensure you’re always riding at your best.
Tools Required
- Torque wrench [paid link]
- Shock pump (with gauge)
- 8mm, 10mm, and 12mm wrenches
- Flathead screwdriver
- Needle nose pliers
- Bicycle stand or suspension workbench
Installing the DB Kitsuma Trunnion Rear Shock
1. Remove the Existing Shock
Before installing the DB Kitsuma Trunnion, ensure the bike is stable and safely secured on a bike stand [paid link]. Use an 8mm wrench to detach the shock from the frame, starting with the mounting bolts on both the upper and lower shock eyelets. Carefully remove the old shock and set it aside.
2. Prepare the New Shock
Unbox the DB Kitsuma Trunnion and inspect it for any shipping damage. Check the shock length and mounting hardware for compatibility with your frame. The trunnion mount is designed to fit frames with a trunnion-style shock mount, so ensure your frame supports this mounting system.
3. Mount the Shock to the Frame
Position the shock on the frame, aligning the trunnion mounts with the shock mount points. The DB Kitsuma Trunnion features a specific eyelet orientation for correct installation, so be sure the shock is facing the correct direction. Insert the mounting bolts and hand-tighten them.
4. Torque the Bolts
Once the shock is in place, use a torque wrench [paid link] to tighten the mounting bolts to the manufacturer’s recommended torque specification. Over-tightening or under-tightening can affect suspension performance, so accuracy is crucial. Consult the Cane Creek manual for specific torque values.
5. Recheck for Proper Fit
Ensure that the shock is securely mounted and that there is no play or movement within the mount points. Check that the shock is fully seated and that all bolts are tightened to spec. A misaligned or loose shock can result in poor performance and potentially damage the frame.
Adjusting the DB Kitsuma Trunnion Rear Shock
The DB Kitsuma Trunnion is known for its wide range of adjustment options, allowing riders to fine-tune their suspension setup for different terrains and riding styles.
1. Set Your Air Pressure
Using a shock pump, inflate the shock to the recommended air pressure based on your weight and riding style. Typically, this can range from 100-250 psi, depending on the rider’s weight. The air pressure controls the shock’s spring rate and affects how it compresses and rebounds. Refer to the Cane Creek guidelines for the exact pressure range suited to your body weight.
2. Adjust Compression Damping
The DB Kitsuma Trunnion features both high-speed and low-speed compression adjustments. These control how the shock responds to different types of impacts. To adjust:
- Low-speed compression: This affects small, slow hits and is typically adjusted for climbing and pedal efficiency. Turn the knob clockwise for a firmer feel or counterclockwise for a softer feel.
- High-speed compression: This is for more aggressive impacts like landing jumps or hitting rocks. Use this adjustment to control harsh hits, turning it clockwise to stiffen the suspension or counterclockwise for more responsiveness.
3. Fine-Tune Rebound Damping
Rebound damping controls the speed at which the shock returns to its original position after compression. A faster rebound is suitable for smoother trails, while a slower rebound helps maintain control on rougher terrain. Adjust the rebound knob at the bottom of the shock, turning it clockwise for slower rebound and counterclockwise for faster rebound.
4. Test and Re-adjust
After initial adjustments, take your bike for a test ride on your typical trails. Make note of how the suspension behaves, and tweak the settings as needed to fine-tune your ride. Small adjustments can significantly impact the bike’s handling, so patience is key when dialing in the shock.
Maintaining the DB Kitsuma Trunnion Rear Shock
Regular maintenance of the DB Kitsuma Trunnion is essential for optimal performance and longevity.
1. Cleaning the Shock
After every ride, clean the shock with mild soap and water to remove dirt, mud, and debris. Use a soft cloth to wipe down the shock, paying special attention to the seals and shaft. Avoid using harsh chemicals or solvents that could damage the shock’s seals or finish.
2. Check for Leaks
Inspect the shock’s air valve and damping adjusters for any signs of oil or air leakage. If you notice any leaks, it may indicate a problem with the seals or internal components, requiring a professional rebuild.
3. Lubricate the Shock
Lubricate the mounting bolts and pivot points periodically to prevent wear and corrosion. Ensure the shock shaft is free of contaminants, and consider applying a light layer of grease to the eyelet bushings for smoother operation.
4. Rebuild and Service
The DB Kitsuma Trunnion requires servicing every 100-150 hours of riding. This involves a full teardown and rebuild of the internal components, including the damper. Cane Creek offers service kits and instructions, or you can have the shock serviced by a professional mechanic.
Troubleshooting Common Issues
1. Shock Not Holding Air
If the shock is not holding air, the internal seals may be damaged. Inspect the air valve and seals for leaks. If necessary, replace the seals or contact Cane Creek for a professional service.
2. Poor Rebound or Compression Adjustment
If the rebound or compression adjustments are not functioning properly, it may indicate an issue with the internal damping system. In this case, a professional service or rebuild may be necessary.
3. Excessive Squeaking or Noise
Squeaking or creaking sounds can indicate that the shock’s bushings or pivots are worn or need lubrication. Clean and lubricate the shock mounts, and check for signs of wear on the bushings.
Customizing the DB Kitsuma Trunnion Rear Shock
The DB Kitsuma Trunnion can be further customized to match your specific riding preferences.
1. Custom Air Springs
The shock can be paired with Cane Creek’s custom air springs for riders seeking a more personalized ride. This allows for a finer adjustment of the shock’s spring rate, providing a better fit for different body weights and riding styles.
2. Fine-Tuning with Volume Spacers
The shock comes with volume spacers that allow you to adjust the shock’s progressiveness. Adding spacers will make the shock ramp up faster, providing more support at the end of the stroke, which is useful for aggressive riders. Removing spacers can make the shock more linear, which benefits lighter riders or those who prefer a plush feel.
3. Upgrading to the DB Kitsuma Coil
If you prefer a coil shock for more consistent damping performance, the DB Kitsuma Trunnion can be upgraded with Cane Creek’s DB Kitsuma Coil [paid link] option. This upgrade provides a more linear spring curve and better performance under heavy loads or rough terrain.
Compatibility with Other Drivetrain Components
When upgrading to the DB Kitsuma Trunnion, it’s important to ensure compatibility with your existing drivetrain components.
1. Frame Compatibility
The DB Kitsuma Trunnion is compatible with most modern mountain bike frames featuring trunnion mounts. Check the frame’s specifications to confirm that the shock’s eyelet length and mounting hardware match.
2. Suspension Geometry
The shock’s adjustments can affect your bike’s overall suspension geometry. Ensure that the frame geometry is compatible with the shock’s travel and stroke length to maintain optimal handling and ride characteristics.
3. Drivetrain Impact
While the shock primarily affects your bike’s suspension, it can indirectly impact your drivetrain performance. Proper suspension performance ensures that your drivetrain operates smoothly, as it reduces unwanted pedal bobbing and power loss on rough terrain.
Conclusion
Upgrading to the Cane Creek DB Kitsuma Trunnion rear shock is a great way to enhance your bike’s suspension performance. By following the correct installation and maintenance procedures, adjusting the shock settings to your riding style, and troubleshooting common issues, you’ll enjoy a smoother, more responsive ride. Regular maintenance will ensure that your shock remains in peak [paid link] condition, and customizations can further fine-tune your setup for specific needs. Whether you’re tackling technical descents or long climbs, the DB Kitsuma Trunnion rear shock offers the performance and reliability you need to ride confidently.