The Marzocchi Bomber 58 suspension fork is a popular choice among serious mountain bikers and riders who demand high-performance suspension for challenging terrain. Its robust design and reliable functionality make it stand out in the world of off-road cycling. In this guide, we will cover the installation, adjustment, maintenance, troubleshooting, and optimization of the Bomber 58 suspension fork, providing expert-level insights that will enhance your riding experience.

Installation of the Marzocchi Bomber 58 Suspension Fork

Installing the Bomber 58 suspension fork requires careful attention to detail to ensure safety and performance. Here’s how to go about it:

1. Remove the Old Fork (if replacing):
   • Loosen the stem bolts and remove the handlebars.
   • Disconnect the brake caliper from the fork.
   • Remove the axle or wheel from the front hub.
   • Loosen the headset and remove the existing fork.
2. Prepare the Bomber 58 Fork:
   • Unbox the Bomber 58 and ensure all components are intact, including the fork, axle, and headset bearings.
   • Verify that the correct steerer tube length is compatible with your frame.
3. Install the Fork:
   • Insert the Bomber 58’s steerer tube into the head tube of the frame.
   • Reinstall the headset components (upper and lower bearings, headset cap, and spacers).
   • Tighten the headset to the manufacturer’s specifications.
   • Reattach the stem and handlebars, ensuring proper alignment.
4. Attach the Wheel:
   • Install the front wheel into the fork dropouts.
   • Tighten the axle or quick release.
5. Reinstall the Brake Caliper:
   • Attach the brake caliper to the fork’s brake mount and ensure proper alignment with the rotor.
6. Final Check:
   • Make sure all bolts are properly torqued.
   • Check the suspension fork for any play or misalignment before riding.

Adjustment of the Bomber 58 Suspension Fork

Adjusting the Bomber 58 fork is crucial for optimizing performance based on your riding style, weight, and terrain. Below are the key adjustments you can make:

Air Pressure Setup

The Bomber 58 features an air spring system that requires proper air pressure for the best performance. The correct air pressure will depend on your weight and riding style.

1. Check the recommended air pressure range: Marzocchi provides a recommended air pressure range in the user manual. Use a shock pump to adjust the pressure.
2. Adjust based on your riding weight: Heavier riders will need higher air pressure, while lighter riders should use lower air pressure.
3. Fine-tune for comfort: Test ride the bike and adjust the air pressure in small increments to find the ideal balance between comfort and performance.

Rebound Damping Adjustment

The rebound damping control affects how quickly the suspension returns after compressing. The Bomber 58 features an external rebound adjuster, which is typically located on the lower part of the fork.

1. Set the rebound to a slow position if you prefer a more controlled return, ideal for aggressive descents.
2. Set the rebound to a faster position if you want quicker fork movement for smoother, technical trails.
3. Test and tweak: Ride the bike and adjust the rebound to suit your needs. If the fork feels too harsh, slow it down; if it feels sluggish, speed it up.

Compression Damping Adjustment

The Bomber 58’s compression damping control can help you fine-tune how the fork absorbs impacts from rough terrain.

1. Adjust to firm up the fork for smoother trails or cross-country riding.
2. Soften the compression for more challenging trails or downhill riding.
3. Test different settings to find the best balance of comfort and performance for your ride.

Maintenance of the Bomber 58 Suspension Fork

Regular maintenance of your Bomber 58 suspension fork will extend its lifespan and ensure it continues to perform at its best. Here are the key steps to keep your fork in top shape:

Clean the Fork Regularly

1. Wipe down the fork legs after every ride to remove dirt, grime, and debris.
2. Use a soft cloth and mild detergent to clean the fork. Avoid using harsh chemicals that could damage the seals.

Lubricate the Fork Seals

1. Apply lubrication to the fork seals periodically to maintain smooth operation and prevent wear.
2. Use a high-quality suspension lubricant and apply it to the upper tubes where the seals make contact.

Inspect for Wear and Tear

1. Regularly inspect the fork for any visible damage, such as cracks, dents, or worn seals.
2. Check the air pressure regularly to ensure it remains within the recommended range.

Service the Fork Internals

1. Every 100 hours of riding or once a year, service the fork internals to ensure proper function.
2. This involves disassembling the fork, cleaning and lubricating the internal parts, and replacing any worn-out seals or bushings.

Troubleshooting Common Issues with the Bomber 58 Suspension Fork

While the Bomber 58 is a highly reliable fork, it’s essential to be aware of common issues and how to resolve them:

Fork Not Rebounding Properly

If the fork does not rebound correctly, it could be due to improper rebound damping settings or low air pressure.

• Solution: Adjust the rebound setting and ensure the air pressure is within the recommended range. If the issue persists, check for a leak in the air spring or the damping system.

Fork Sticking or Not Moving Smoothly

If the fork feels sticky or doesn’t compress smoothly, it may be due to dirty seals or lack of lubrication.

• Solution: Clean the fork and apply fresh lubrication to the seals. If the issue continues, consider replacing the seals or servicing the fork internals.

Air Pressure Loss

If you notice a loss of air pressure over time, it could indicate a problem with the air spring or the seals.

• Solution: Check the fork for leaks and replace any damaged seals. Use a shock pump to check air pressure regularly to ensure it is holding steady.

Customization and Optimization for Better Performance

To extract the best performance from your Bomber 58, consider these customization options:

Adjust Spring Rate for Different Terrain

For riders who frequently ride on different terrains, it might be beneficial to adjust the spring rate by swapping out the air spring or tuning the pressure. A firmer spring setup will perform better on smooth, fast trails, while a softer spring setup is more suited for aggressive downhill riding.

Upgrade Damping Cartridge

If you find that the factory damping settings do not meet your preferences, consider upgrading to a high-performance damping cartridge. This will provide more precise control over compression and rebound, giving you a more responsive and customized ride.

Adjust Fork Geometry with Travel Changes

The Bomber 58 features adjustable travel, allowing you to fine-tune the fork’s geometry. Increasing or decreasing travel can have a significant impact on your bike’s handling, stability, and comfort. Riders who prefer steep, technical descents may benefit from increased travel, while those who ride cross-country may want a shorter travel setting for faster handling.

Comparison with Similar Models

When compared to other suspension forks in its class, the Bomber 58 stands out for its durability and adjustable features. Here’s how it compares to some of its competitors:

• RockShox Lyrik: While the RockShox Lyrik offers similar performance, the Bomber 58’s air spring system is known for its smoother feel and less maintenance. The Lyrik is often regarded for its slightly more refined rebound control.
• Fox 36: The Fox 36 is a close competitor, offering a lightweight feel and precision in adjustment. However, the Bomber 58’s price point often makes it a more budget-friendly choice without sacrificing performance.
• DVO Diamond: The DVO Diamond is known for its top-tier adjustability and plush ride. While it may outperform the Bomber 58 in some areas of smoothness, the Bomber 58 provides excellent value for riders who want a balance of performance and affordability.

Understanding Compatibility with Other Drivetrain Components

The Bomber 58 suspension fork is designed to integrate seamlessly with a wide range of bike setups. However, it’s essential to consider a few factors when pairing it with your drivetrain components:

• Hub Compatibility: Ensure that the fork’s dropout is compatible with your wheel hub type, whether quick release or thru-axle.
• Brake Mount Compatibility: The Bomber 58 is equipped with a post-mount brake system, so make sure your brake calipers are compatible with this mounting standard.
• Frame Compatibility: Verify that your bike’s head tube and fork steerer tube dimensions match, as well as the travel range and wheel size that the fork supports.

By understanding the compatibility of the Bomber 58 with other drivetrain components, you can ensure smooth integration and optimal performance.