The Bomber Air Trunnion [paid link] rear shock from Marzocchi has garnered attention in the cycling world for its performance and durability. Designed for aggressive riders and those who demand high-end suspension performance, this rear shock offers superior adjustability, responsive damping, and robust construction. In this guide, we will dive deep into the installation, maintenance, customization, and troubleshooting aspects of the Bomber Air Trunnion [paid link] rear shock. Additionally, we’ll compare it with similar models to help you decide if this is the right option for your bike setup.
Installation of the Bomber Air Trunnion Rear Shock
Step 1: Prepare Your Tools and Bike
Before beginning the installation, make sure you have all necessary tools and a clean, stable work environment. Having the right tools ensures that the process is efficient and safe for your bike.
Step 2: Remove the Old Shock
If you’re replacing an old rear shock, start by removing it. Use the appropriate tool to remove the bolts securing the shock to the frame and the linkage. Make sure to carefully remove any spacers that may be present in the old shock setup.
Step 3: Install the Bomber Air Trunnion Shock
Place the Bomber Air [paid link] Trunnion rear shock into the mounting points of your bike frame. Ensure the shock’s eyelet fits correctly into the trunnion mounts. Tighten the bolts to secure the shock in place. Be sure not to overtighten, as this can damage the frame or shock.
Step 4: Reattach Any Linkages or Accessories
If your bike features additional components such as a linkage or a lower mount adapter, reattach these parts securely. Double-check that all connections are tight and aligned.
Step 5: Air Pressure Adjustment
Adjust the air pressure in the shock according to the rider’s weight and riding style. The Bomber Air [paid link] Trunnion features an air chamber that allows you to fine-tune the pressure for a more personalized feel. Use a shock pump to achieve the recommended air pressure.
Step 6: Final Inspection
Once the shock is installed and the air pressure is adjusted, give the bike a final inspection to ensure that all bolts are secure and that the shock operates smoothly.
Adjustments and Maintenance
Rebound and Compression Damping Adjustments
The Bomber Air Trunnion rear shock offers a wide range of adjustments to fine-tune your ride. It features separate controls for both rebound and compression damping, giving riders the ability to modify the shock to their exact preferences.
- Rebound Damping: Adjusting the rebound controls the speed at which the shock returns to its normal position after compression. If the rebound is too fast, the bike may feel “bouncy,” while too slow a rebound can cause the shock to feel sluggish. Set it to a level where the shock returns smoothly but quickly enough to avoid packing down.
- Compression Damping: The Bomber Air Trunnion offers low and high-speed compression adjustments. The low-speed adjustment controls the initial portion of the stroke, which is critical for controlling small bumps and maintaining stability. The high-speed adjustment influences how the shock handles larger impacts, helping to prevent bottoming out on big hits.
Air Pressure Maintenance
Regularly check and adjust the air pressure in the Bomber Air Trunnion shock. Over time, air pressure can fluctuate, especially after extended riding sessions or weather changes. It’s crucial to check the shock’s air pressure periodically to ensure the suspension is working optimally.
Cleaning and Lubrication
To keep the Bomber Air Trunnion rear shock in top shape, clean the shock’s body and seals regularly. Use a soft cloth to wipe off any dirt or debris, and apply a small amount of suspension-specific lubricant to the seals to maintain smooth performance. Avoid using harsh chemicals that could damage the shock’s components.
General Shock Maintenance
Perform a thorough check-up of your rear shock after every few rides. Inspect the shock’s body for any visible damage or wear, particularly the seals and air valve. If you notice any leaking or performance degradation, it’s best to service the shock. Marzocchi recommends having the shock serviced regularly, especially if you ride in harsh conditions.
Troubleshooting Common Set-Up Issues
Issue 1: Insufficient Rebound Control
If your shock feels overly bouncy or the rear end doesn’t settle quickly after impacts, the rebound damping might be too fast. To fix this, slowly increase the rebound setting until the shock returns at a controlled pace. Test ride the bike after each adjustment to fine-tune the performance.
Issue 2: Bottoming Out
If you experience bottoming out, where the shock compresses too much and hits its travel limit, this could be due to either too low air pressure or too little high-speed compression damping. Try increasing the air pressure first, followed by increasing the high-speed compression settings until the shock feels more supportive during big hits.
Issue 3: Unresponsive Suspension
If the shock feels too stiff or doesn’t react to smaller bumps, check the air pressure and adjust it according to your weight and riding style. Additionally, ensure that both the rebound and compression settings are properly tuned. Low air pressure combined with stiff damping can create a feeling of unresponsiveness.
Issue 4: Leaking Air
If you notice any air leaking from the shock, it may indicate a damaged seal or valve. In this case, inspect the shock’s seals and ensure the valve is properly tightened. If the problem persists, it may be necessary to take the shock to a professional for servicing or seal replacement.
Customization and Optimization for Better Performance
The Bomber Air Trunnion shock offers plenty of room for customization to suit different riding styles. Whether you’re riding downhill, trail, or enduro, adjusting the shock to your specific needs can make a noticeable difference in your bike’s performance.
- Adjust the Air Pressure: Fine-tuning the air pressure to match your body weight and the type of terrain you ride on is essential for optimal performance. Lighter riders may need lower air pressure for a more plush feel, while heavier riders may prefer higher pressure for better support.
- Tuning the Damping: Riders who frequently tackle technical terrain can benefit from a stiffer compression setting for more control during big drops and harsh impacts. Alternatively, riders looking for a smoother, more forgiving feel on cross-country trails may prefer a softer compression setting and higher rebound for better handling of smaller bumps.
By taking the time to experiment with these adjustments, you can achieve a rear shock setup that matches your riding preferences and boosts your performance.
Comparison with Similar Models
The Bomber Air Trunnion rear shock stands out in the market, but it is not the only option for serious riders. Below is a comparison with a few similar models to highlight its unique qualities.
Fox DPX2 vs. Bomber Air Trunnion
- Damping: The Fox DPX2 offers a similar dual-adjustment system (rebound and compression), but it has a more sophisticated adjuster system with three distinct compression settings (Open, Medium, and Firm). The Bomber Air Trunnion, by contrast, focuses on a more simplified adjustment system that may appeal to riders seeking fewer complexities.
- Weight: The Bomber Air Trunnion is slightly heavier than the Fox DPX2, but it compensates with excellent durability and performance in aggressive riding conditions.
RockShox Super Deluxe vs. Bomber Air Trunnion
- Air Spring: The RockShox Super Deluxe has a coil version and a more extensive air spring range, but the Bomber Air Trunnion excels in terms of responsiveness and customization of air pressure. It provides a smoother ride for riders who prefer air shocks over coil systems.
- Price: The Bomber Air Trunnion is often more affordable compared to the RockShox Super Deluxe, making it an attractive option for riders on a budget.
Understanding Compatibility with Other Drivetrain Components
The Bomber Air Trunnion rear shock is designed to work seamlessly with most modern mountain bike frames, especially those designed with a trunnion mount. However, it’s important to verify compatibility with your frame’s suspension system and ensure the shock’s travel length matches your bike’s design.
While this shock integrates well with various drivetrains, make sure to check the specifications for your specific bike to ensure the shock works effectively with your bike’s geometry, rear triangle, and suspension design. Additionally, pairing it with a compatible fork and other suspension components from Marzocchi or other high-end brands can optimize your bike’s overall performance.