The Bomber Air Trunnion [paid link] rear shock from Marzocchi represents a high-performance, versatile [paid link] option for riders seeking exceptional suspension and ride quality. Known for its smooth feel and durable construction, it offers top-tier performance for both amateur and professional cyclists. This article will provide a detailed guide on installation, maintenance, troubleshooting, and optimization of the Bomber Air Trunnion [paid link] rear shock, ensuring you get the best performance out of your investment.
Installation of Bomber Air Trunnion Rear Shock
Installing the Bomber Air [paid link] Trunnion rear shock requires careful attention to detail to ensure optimal performance and safety. Here’s how to do it step-by-step:
- Prepare the Tools and Workspace: Make sure you have a clean, organized workspace and all necessary tools. It’s crucial to work on a stable surface to prevent damaging your bike or shock during the installation process.
- Remove the Existing Shock:
- Use a 5mm Allen wrench [paid link] to remove the bolts holding the old shock in place.
- Carefully slide the shock out of its mount, taking note of the orientation for reinstallation.
- Install the Bomber Air [paid link] Trunnion:
- Align the shock’s eyelet and trunnion mount with the frame’s shock mount.
- Insert the mounting bolts through the shock and tighten them with the correct torque, typically around 8-10 Nm.
- Check the Setup: Once installed, ensure the shock is aligned correctly with the frame, and there’s no binding or misalignment when the bike is compressed.
Adjustment of Bomber Air Trunnion Rear Shock
The Bomber Air Trunnion rear shock offers a variety of adjustable features to help riders fine-tune the suspension to their specific needs. Here’s how to adjust it for optimal performance:
Rebound Adjustment
The rebound adjustment controls how quickly the shock returns to its original position after compressing. This can significantly impact your ride’s feel and stability.
- Locate the Rebound Knob: On the Bomber Air Trunnion, the rebound knob is located at the base of the shock.
- Adjust the Rebound Speed: Turn the knob clockwise for slower rebound and counterclockwise for faster rebound. Adjusting to the correct setting will prevent the bike from feeling “bouncy” or unstable, especially on rough terrain.
Air Pressure Adjustment
Proper air pressure is essential for achieving the best balance between comfort and performance. The Bomber Air Trunnion uses an air spring that can be adjusted based on your weight and riding style.
- Use a Shock Pump: Attach a shock pump to the air valve located on the shock’s top.
- Set the Pressure: Start with a recommended pressure based on your weight (typically found in the user manual), then adjust based on personal preference or riding conditions.
- Fine-Tune for Performance: Once the air pressure is set, test ride the bike and adjust accordingly for a comfortable, controlled ride. Remember, more air pressure will make the shock stiffer, while less pressure results in a softer ride.
Maintenance of Bomber Air Trunnion Rear Shock
Regular maintenance is crucial to keep your Bomber Air Trunnion rear shock functioning at its best. Here are key maintenance tasks:
Cleaning the Shock
- Wipe Down the Shock: After each ride, wipe down the shock with a soft cloth to remove dirt and debris.
- Inspect the Seals: Check the seals for any wear or damage. If you notice any leakage or rough movement, it may be time to replace the seals.
Servicing the Air Spring
- Check the Air Pressure Regularly: Over time, air pressure can fluctuate. Ensure you check and adjust it periodically to maintain optimal performance.
- Remove and Reinstall the Shock: For a more in-depth cleaning, it’s advisable to remove the shock once every six months or after extensive use. Clean the shock body and check the air chamber for any signs of damage.
Replacing Oil and Seals
- Disassemble the Shock: If you’re familiar with shock maintenance, you can disassemble the shock to replace the oil and seals. If not, it’s best to take it to a professional.
- Use the Right Fluid: Ensure you use the manufacturer-recommended oil for reassembly to maintain proper damping characteristics.
Troubleshooting Common Setup Issues
While the Bomber Air Trunnion is a high-quality shock, riders may occasionally encounter issues. Here are solutions to common setup problems:
Leaking Air Pressure
If you notice air leaking from the shock, it’s usually due to a worn-out seal.
- Fix: Inspect the seals and replace any damaged ones. If you are not confident, take the shock to a bike shop for servicing.
Lack of Rebound Control
If the shock doesn’t rebound properly or feels too fast or slow, it could be due to improper rebound adjustments or oil contamination.
- Fix: Adjust the rebound knob and check the shock’s oil levels. If necessary, have the shock serviced to replace contaminated oil.
Poor Performance on Rough Terrain
If the shock feels harsh or unresponsive on rough trails, it might be due to incorrect air pressure or rebound settings.
- Fix: Adjust the air pressure to better suit your weight and riding style. Recheck the rebound settings to make sure they are dialed in for the type of riding you’re doing.
Customization and Optimization for Better Performance
For optimal performance, riders can further customize their Bomber Air Trunnion rear shock based on terrain, riding style, and personal preferences. Here are a few tips:
Adjusting to Different Terrain
- Softer Terrain: Lower the air pressure slightly to increase comfort and improve traction.
- Technical Trails: Increase air pressure for more support and better performance over rough obstacles.
- Downhill Riding: Consider running higher air pressure to prevent bottoming out and ensure stable handling at high speeds.
Fine-Tuning Rebound for Speed and Control
Adjusting rebound settings can drastically alter how the shock responds during high-speed sections or technical descents. Experiment with the rebound control to find a setting that enhances stability and control for your specific riding conditions.
Compatibility with Other Drivetrain Components
The Bomber Air Trunnion rear shock is designed to work with a wide range of modern mountain bike frames, though compatibility with other drivetrain components should always be checked before installation. The shock uses a standard 30mm eyelet mount, which is compatible with most suspension frames that support trunnion-mount shocks. Be sure to verify the following before installation:
- Shock Length and Stroke: Ensure the shock’s length and stroke match the specifications of your frame for optimal performance.
- Mounting Points: Double-check that the mounting points on your frame are designed for trunnion-mount shocks.
Comparison with Similar Models
When comparing the Bomber Air Trunnion to other similar shocks, the key differences lie in performance, adjustability, and overall design.
Marzocchi Bomber Air Trunnion vs Fox Float DPX2
- Performance: The Bomber Air Trunnion offers a more plush and forgiving feel, making it ideal for riders who prioritize comfort and traction. The Fox Float DPX2, however, offers a stiffer feel with better support on high-speed terrain.
- Adjustability: Both shocks offer rebound and air pressure adjustments, but the Fox Float DPX2 has more advanced compression settings, allowing for more granular tuning.
- Price: The Bomber Air Trunnion is often more affordable compared to the Fox Float DPX2, making it a great option for budget-conscious riders seeking high performance.
Conclusion
The Bomber Air Trunnion rear shock from Marzocchi provides excellent value for riders seeking a reliable, versatile [paid link], and adjustable rear shock for their mountain bike. With proper installation, regular maintenance, and a few adjustments, you can ensure this shock offers top-tier performance for a variety of riding styles and conditions. Whether you’re tackling technical descents or cruising on smoother trails, the Bomber Air Trunnion delivers the performance you need for a smooth and controlled ride.