Top Reasons to Choose the Bomber CR Trunnion Rear Shock

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The Marzocchi Bomber CR Trunnion [paid link] Rear Shock is a high-performance component designed for mountain bikers who demand exceptional durability, responsiveness, and adjustability. Whether you’re an experienced rider or a beginner looking to enhance your bike’s performance, the Bomber CR Trunnion [paid link] delivers top-tier performance that ensures smooth, controlled rides across various terrains. This comprehensive guide covers all aspects of the Bomber CR Trunnion, from installation and maintenance to troubleshooting and compatibility with other drivetrain components.

Installation of the Bomber CR Trunnion Rear Shock

Installing the Bomber CR Trunnion Rear Shock on your bike requires careful attention to detail and proper tools. The installation process is relatively straightforward, provided you follow the correct steps to ensure a secure fit and optimal performance.

Tools Required

  • 8mm Allen wrench [paid link]
  • Torque wrench [paid link] (with a range of 5-25Nm)
  • Grease
  • Adjustable spanner (if necessary)
  • Rags for cleaning

Steps for Installation:

  1. Remove the Old Shock: Begin by detaching your current rear shock. Loosen the bolts using an 8mm Allen wrench [paid link], ensuring that you release the shock from both the upper and lower mount points.
  2. Clean the Mounting Points: Before installing the Bomber CR, thoroughly clean the mounting points to remove any dirt or debris that could compromise the installation.
  3. Apply Grease: Lightly grease the mounting surfaces to prevent squeaking and ensure smooth movement.
  4. Attach the Bomber CR Trunnion: Place the Bomber CR Trunnion shock into the mounting points. Ensure that the shock is aligned correctly with the mounts. Insert the bolts and tighten them with an Allen wrench.
  5. Torque the Bolts: Use a torque wrench [paid link] to tighten the mounting bolts to the manufacturer’s specified torque (usually around 10-15Nm). This ensures that the shock is securely in place without over-tightening.
  6. Check the Suspension Linkage: Before finalizing, ensure the shock’s linkage moves freely without any restrictions. This is crucial for proper suspension function.

After installation, ensure that you perform a test ride to confirm proper fit and performance. Adjustments may be necessary based on your specific riding preferences.

Adjustment and Fine-Tuning

Once the Bomber CR Trunnion is installed, adjusting it to suit your riding style is essential. The Bomber CR offers a variety of settings to customize its performance.

Rebound Damping:

The Bomber CR Trunnion comes with a rebound adjustment knob that controls how quickly the shock returns after compression. Adjust the rebound to suit your riding style:

  • Faster Rebound: Ideal for aggressive riding and rapid terrain changes.
  • Slower Rebound: Best for smoother terrain and controlled descents.

Compression Damping:

Compression damping controls how the shock responds to compression from impacts. The Bomber CR features an adjustable compression knob for fine-tuning:

  • High-Speed Compression: Controls the shock’s response to larger impacts at higher speeds. Use this setting for rough, technical terrain.
  • Low-Speed Compression: Adjusts how the shock handles slower compressions such as pedaling forces or small bumps.

Air Pressure:

The air spring pressure determines the overall stiffness of the shock. Adjust the air pressure to match your body weight and riding style. Higher pressure is suited for heavier riders or aggressive riding, while lower pressure is better for lighter riders or a plush, comfortable ride.

Sag Setup:

Proper sag is vital for suspension performance. For the Bomber CR Trunnion, set the sag to around 25-30% of the shock’s total travel. This ensures the shock provides enough support without bottoming out on bigger hits.

Maintenance and Care

Regular maintenance is crucial to ensure the Bomber CR Trunnion continues to perform at its best over time. The shock requires periodic servicing, including cleaning and lubrication, to keep it running smoothly.

Cleaning:

  • After every ride, clean the shock’s body with a damp cloth to remove dirt, mud, and grime. Avoid using harsh chemicals that could damage the shock’s finish.
  • Inspect the shock’s seals regularly for signs of wear. If the seals are damaged, they may need to be replaced to maintain optimal performance.

Lubrication:

  • Apply a small amount of lubricant to the shock’s pivot points and mounting areas to reduce friction and wear.
  • Regularly check the air spring pressure, especially if you notice changes in performance.

Annual Servicing:

Even with proper care, the Bomber CR Trunnion will require professional servicing once a year. This service should include a full rebuild to ensure the shock continues to function optimally. During this service, the internal components are cleaned, lubricated, and inspected for damage or wear.

Troubleshooting Common Issues

While the Bomber CR Trunnion is a reliable shock, you may encounter some common issues during use. Here are a few troubleshooting tips to resolve typical problems:

Issue: The Shock Feels Too Stiff or Too Soft

  • Solution: Check the air pressure and adjust it according to your body weight and riding style. If the shock feels too soft, add air pressure. If it’s too stiff, reduce the pressure.
  • Solution: Adjust the compression and rebound damping settings to ensure they match your riding conditions.

Issue: The Shock is No Longer Rebounding Properly

  • Solution: If the rebound is too slow, check the rebound knob and adjust it. If the shock feels sluggish or is not rebounding at all, it may require servicing to address internal issues such as low oil levels or a damaged damper.

Issue: Leaking Oil or Air

  • Solution: Inspect the seals and wiper seals for any signs of wear or damage. If oil or air is leaking, the seals may need replacement. Professional servicing will be necessary to replace damaged seals.

Customization and Optimization for Better Performance

The Bomber CR Trunnion is highly customizable to optimize performance for specific riding conditions. Riders can adjust the shock to perform better in various disciplines such as trail riding, enduro, or downhill.

Tailoring for Trail Riding:

  • Set the air pressure and rebound damping for a plush, comfortable ride while maintaining stability over technical terrain. A mid-range compression setting will help maintain control over rough sections.

Tailoring for Downhill Riding:

  • Increase the air pressure to prevent bottoming out during aggressive descents. Use a higher compression damping setting to handle high-speed impacts. A slower rebound setting is often preferred to provide more control on fast descents.

Tailoring for Enduro Riding:

  • Set the shock to offer a balance between plushness and control, with a focus on stability for long, grueling descents and technical sections. A medium air pressure combined with mid-range rebound and compression settings will provide a versatile [paid link] setup.

Comparison with Similar Models

When comparing the Bomber CR Trunnion to other rear shocks in the market, it stands out for its rugged [paid link] construction, easy adjustability, and excellent performance in challenging conditions. Here’s a quick comparison with a few similar models:

  • Fox Float X2: While the Fox Float X2 is known for its advanced performance features, the Bomber CR Trunnion is often favored by riders looking for a more straightforward, user-friendly shock without compromising on performance.
  • RockShox Super Deluxe: The RockShox Super Deluxe offers great customization but is generally more complex and may require more maintenance. The Bomber CR Trunnion, on the other hand, is known for being more durable and easier to service.

Compatibility with Other Drivetrain Components

The Bomber CR Trunnion is compatible with a wide range of bike frames, but it’s important to ensure compatibility with your bike’s drivetrain components before installation. Since the shock features a trunnion mount, it pairs well with modern enduro and downhill frames that are designed to support trunnion-based rear shocks. Always check the specifications of your frame to ensure proper mounting.

Additionally, the shock’s settings can be fine-tuned to work seamlessly with different drivetrain setups. Whether you have a 1x or 2x drivetrain, the Bomber CR Trunnion will complement your system and enhance the overall suspension performance.

In conclusion, the Marzocchi Bomber CR Trunnion Rear Shock is a high-quality, durable, and customizable component that caters to serious mountain bikers. Its easy installation, adjustability, and solid performance across various terrains make it a top choice for riders looking to optimize their suspension system.