The Marzocchi Bomber Air [paid link] rear shock is an exceptional piece of equipment for riders seeking both performance and durability. To get the most out of your Bomber Air [paid link], one of the most important steps is setting up the sag correctly. Sag plays a crucial role in ensuring that your bike feels balanced, responsive, and capable of handling various terrain types. This guide will walk you through the steps of setting up the sag on your Marzocchi Bomber Air, troubleshooting common issues, and understanding how to optimize it for maximum performance.

Tools Required

• Shock pump (compatible with Marzocchi Bomber Air)
• Ruler or sag measuring device
• Cable ties or Velcro strap
• Allen wrenches [paid link] (if needed for adjustments)

Importance of Correct Sag Setup

Sag is the amount the shock compresses under your body weight when you’re sitting on the bike in a riding position. Proper sag ensures that your suspension operates within its optimal range, which enhances traction, comfort, and control. Incorrect sag can result in a rough ride, poor handling, or reduced suspension performance. Setting the right sag for your Marzocchi Bomber Air ensures the shock performs as intended across various trail conditions.

How to Set Up Sag for the Marzocchi Bomber Air

Step 1: Measure Your Rider Weight and Select the Correct Spring Rate

Before you begin setting the sag, make sure the spring rate (air pressure) of your Bomber Air is appropriate for your body weight. Refer to Marzocchi’s guidelines for suggested air pressure based on weight, or use a shock pump to adjust the air pressure in your rear shock. The Bomber Air typically offers a large air spring range, so finding the right air pressure will be crucial.

• Light Riders (under 150 lbs / 68 kg): Set your air pressure on the lower end of the recommended range.
• Average Riders (150-200 lbs / 68-90 kg): Use a middle range air pressure.
• Heavier Riders (over 200 lbs / 90 kg): Opt for higher air pressures for added support.

Step 2: Prepare the Shock for Sag Measurement

1. Attach a cable tie or Velcro strap to the stanchion of the rear shock. This will act as a reference point to measure the amount of shock compression.
2. Set the bike on a level surface and get into your typical riding position while holding the handlebars and sitting firmly on the saddle.
3. Wear your full riding gear (helmet, backpack, etc.) to simulate your riding weight.

Step 3: Measure the Sag

1. With the cable tie in place, bounce gently on the saddle a few times to ensure the suspension settles.
2. Stand up and carefully remove the bike from your riding position.
3. Measure the distance between the cable tie or Velcro strap and the shock’s top seal or collar. This will give you the amount of sag.
4. For the Marzocchi Bomber Air, the ideal sag is typically between 25% and 30% of the shock’s total travel. If you find that the sag is too low or too high, adjust the air pressure in the shock accordingly.

Step 4: Adjust the Air Pressure for Correct Sag

• To decrease sag (less travel compression): Add air to the shock using a shock pump.
• To increase sag (more travel compression): Release air from the shock slowly using the shock pump’s valve.

Re-check the sag after each adjustment to ensure you’ve reached the desired percentage of travel.

Troubleshooting Common Setup Issues

Issue 1: Too Much Sag (Over-compression)

If the sag is too deep, meaning the shock compresses more than the desired 25-30% range, this can result in a sluggish, less responsive ride. Over-compression can cause the shock to bottom out too quickly, especially on jumps or drops.

Solution:

• Increase the air pressure in the shock. This will raise the spring rate and reduce the amount of compression when you sit on the bike.
• If the problem persists, check for any air leaks or damage to the shock’s seals.

Issue 2: Too Little Sag (Under-compression)

If the sag is too shallow, meaning the shock doesn’t compress enough, you may experience a harsh ride with less traction on uneven terrain. This can lead to discomfort and a bouncy feel when riding.

Solution:

• Decrease the air pressure in the shock to make the suspension more supple and responsive.
• If you’ve already reduced air pressure and the sag still feels too shallow, check that you’re following the correct weight range for your shock’s air spring.

Issue 3: Shock Not Settling Properly

Sometimes, you might find that your shock isn’t settling into the correct position after a bounce or compression test. This could be due to improper air pressure or other internal issues.

Solution:

• Double-check the air pressure settings, as incorrect values can prevent the shock from fully settling.
• If the shock still doesn’t settle correctly, inspect it for any mechanical issues, such as damaged seals or air leaks.

Customizing the Bomber Air for Performance

Once you have the correct sag setup, you can further optimize your Marzocchi Bomber Air by adjusting the rebound and compression settings. These adjustments control how quickly the shock rebounds after compressing and how much resistance it offers during compression. Tuning these settings allows you to fine-tune your ride for specific trail conditions.

• Rebound Adjustment: Controls how quickly the shock returns after compression. If it’s too fast, you’ll feel like you’re bouncing after every hit. If it’s too slow, the bike may feel sluggish and unresponsive. Adjust it to match your riding style and terrain.
• Compression Adjustment: Controls how much resistance the shock provides when compressing under pressure. A stiffer compression setting is great for aggressive riders or rough trails, while a softer setting works well for smoother, flowing trails.

Comparison with Similar Rear Shocks

When choosing a rear shock, riders often compare the Marzocchi Bomber Air with other models like the RockShox Super Deluxe or Fox Float DPS. The Bomber Air stands out due to its durability, simple setup, and performance consistency, making it an excellent choice for aggressive trail riders who want a straightforward yet high-performing shock.

• Marzocchi Bomber Air: Known for its robustness, reliability, and ease of use. Perfect for riders who prioritize durability and prefer a less complicated setup.
• RockShox Super Deluxe: Offers more fine-tuned adjustments, making it ideal for riders who want a high level of customization. However, it may require more technical knowledge.
• Fox Float DPS: Provides excellent damping performance and more tuning options but may not be as user-friendly as the Bomber Air.

Compatibility with Other Drivetrain Components

The Marzocchi Bomber Air is designed to be compatible with a variety of drivetrains. It features a wide range of air pressure adjustments and travel settings, making it suitable for different bikes and rider preferences. Whether you’re running a 1x or 2x drivetrain, the shock’s compatibility with different setups ensures you can focus on optimizing your ride without worrying about component mismatches.

Before making any modifications, however, always check the overall geometry of your bike to ensure that the shock’s travel and mounting specifications align with your frame.