The RockShox Bluto RL is one of the most popular suspension forks for fat bikes, offering a blend of durability, performance, and adjustability that riders appreciate. With its precision engineering, smooth performance, and versatility, it stands out as a top choice for those tackling rough terrain or deep snow. In this guide, we will cover the installation, maintenance, and optimization of the Bluto RL, along with troubleshooting tips and compatibility considerations.

Installation of the RockShox Bluto RL Suspension Fork

Installing the Bluto RL suspension fork requires careful attention to detail to ensure it is properly mounted and functions as intended. Below are the key steps to follow during installation:

1. Remove the Old Fork

Before installing the Bluto RL, you need to remove the existing fork from the bike:

• Loosen the headset bolts.
• Remove the front wheel and brake caliper.
• Disconnect any cables or hoses attached to the fork (e.g., brake or suspension lockout cables).
• Loosen and remove the stem and headset components.
• Slide the old fork out of the head tube.

2. Prepare the Bluto RL Fork

Before installing the Bluto RL, make sure the fork is properly prepped:

• Verify the fork length and steerer tube are compatible with your bike’s frame.
• Install the proper headset spacers on the steerer tube if necessary.
• Ensure that the damper and air spring are properly adjusted for your riding style.

3. Install the Bluto RL Fork

Now, it’s time to mount the Bluto RL suspension fork:

• Insert the fork’s steerer tube into the head tube of your bike frame.
• Align the fork with the head tube and insert the stem, tightening it securely to the steerer tube.
• Reinstall the headset components and tighten them to manufacturer specifications.
• Attach the front wheel, ensuring proper axle installation.
• Connect the brake caliper, ensuring the brake rotor is correctly aligned with the caliper.

4. Adjust Air Pressure

The Bluto RL fork is equipped with an air spring that requires adjustment based on your weight and riding style. Use a shock pump to adjust the air pressure to the recommended levels, which can be found in the user manual. Start with the baseline recommended setting and fine-tune based on personal preference.

5. Test the Fork

Once everything is installed, take the bike for a test ride to ensure the fork is functioning properly. Pay attention to any unusual sounds or excessive stiffness, which could indicate improper installation.

Adjusting the Bluto RL Suspension Fork

The Bluto RL fork offers several adjustable features that can be customized for different riding conditions. Here’s how to fine-tune these settings for the best performance.

Compression and Rebound Damping

• Compression Adjustment: The Bluto RL features a low-speed compression adjustment dial. This dial controls the rate at which the fork compresses when encountering bumps or obstacles. To adjust the compression, turn the dial clockwise to stiffen the fork and counterclockwise to soften it. Start with a neutral setting and adjust based on the trail conditions.
• Rebound Adjustment: The rebound dial controls how quickly the fork returns to its original position after compression. Turn the dial clockwise for slower rebound and counterclockwise for faster rebound. Set it to the manufacturer’s recommended setting as a baseline, then fine-tune it for optimal performance.

Air Spring Pressure

The Bluto RL fork uses an air spring, which can be adjusted for different rider weights. Use a shock pump to adjust the air pressure in the fork’s positive chamber. The recommended pressure will depend on your weight, and you can find these figures in the user manual. Proper air pressure will ensure the fork reacts correctly to the terrain.

Lockout Mechanism

The Bluto RL includes a lockout feature that prevents the fork from compressing, providing a more efficient ride on flat or paved surfaces. To activate the lockout, simply use the lever on the top of the right fork leg. This feature is useful for climbing or long, smooth rides.

Maintenance of the Bluto RL Suspension Fork

Proper maintenance is essential for keeping your Bluto RL fork performing at its best. Follow these steps for routine maintenance:

Regular Cleaning

After each ride, clean the fork legs with a soft cloth to remove any dirt or debris. This helps prevent dirt from entering the seals and damaging the fork. Apply a small amount of silicone-based lubricant to the fork stanchions to maintain smooth movement.

Air Spring Service

Over time, the air spring can lose air pressure or accumulate contaminants. To maintain optimal performance, check the air pressure regularly and service the air spring every 50-100 hours of riding.

Replacing the Seals

The fork’s seals prevent dirt and moisture from entering the internal components. Over time, seals can wear out or become damaged. Inspect the seals periodically and replace them if necessary. This can be done by removing the fork’s lowers and installing new seals.

Damper Maintenance

The damper inside the Bluto RL requires occasional servicing to maintain its performance. If you notice reduced damping or unusual behavior, it may be time to send the fork in for a full service. A full damper service includes oil replacement and internal cleaning.

Troubleshooting Common Issues

Despite its quality construction, the Bluto RL fork can experience some common issues. Here’s how to address them:

Fork Not Rebounding Properly

If the fork is not rebounding as expected, check the rebound adjustment dial. Ensure it’s set to the correct setting for your weight and riding style. If the issue persists, inspect the fork’s seals and internal components for wear or damage.

Fork Feeling Too Stiff or Too Soft

If the fork feels too stiff or too soft, adjust the air spring pressure. Ensure the correct air pressure is set based on your weight. If the fork remains inconsistent in its travel, it may require a seal replacement or damper servicing.

Noisy Fork

If your Bluto RL fork starts making unusual noises, such as squeaking or clunking, check for dirt buildup or lack of lubrication on the stanchions. Clean the fork and reapply lubrication. If the noise persists, check the internal components for damage.

Customization and Optimization for Better Performance

The Bluto RL suspension fork can be fine-tuned for different riding styles and conditions. Here are a few tips for optimizing its performance:

Tuning for Aggressive Riding

If you plan to ride aggressively on rough, technical trails, consider increasing the compression damping to provide more control and reduce fork dive. You can also increase the air pressure for a firmer ride, which can help prevent bottoming out.

Tuning for Endurance Riding

For long-distance or endurance rides, you may want a softer fork feel. Lower the compression and adjust the rebound to ensure maximum comfort over long hours of riding. A moderate air pressure setting will offer a more plush, forgiving ride.

Compatibility with Other Drivetrain Components

The Bluto RL suspension fork is designed to work with a variety of fat bike drivetrains. It uses a 15mm quick-release or thru-axle, depending on the specific model, and is compatible with a wide range of front derailleurs and disc brake systems.

When installing the fork, it’s important to check for proper axle compatibility with your frame and wheelset. The fork’s air spring can also be adjusted to accommodate different rider weights and suspension preferences, ensuring it works harmoniously with your other components.

By following the proper maintenance and adjustment procedures, you can keep the Bluto RL fork performing at its peak, providing smooth and reliable performance in all conditions.