The Monarch RT3 rear shock from RockShox offers a blend of comfort, performance, and adjustability that makes it a popular choice for riders seeking optimal control over their mountain biking experience. Designed for all-mountain and cross-country riders, the Monarch RT3 rear shock provides efficient suspension with three separate adjustable damping settings: Open, Pedal, and Lock. In this guide, we will explore the installation, adjustment, and maintenance of the Monarch RT3 rear shock, as well as troubleshooting tips, customization options, and compatibility with other drivetrain components.

Installation of the Monarch RT3 Rear Shock

Step-by-step Installation Process

Installing the Monarch RT3 rear shock is a relatively straightforward process, but it requires precision to ensure maximum performance and safety. Below are the general steps for installing this shock:

1. Prepare the bike: Begin by removing the rear wheel for better access to the shock mount. Depending on the bike model, this may involve removing the rear triangle or disconnecting the rear derailleur.
2. Remove the old shock: Use the appropriate tools to remove the old rear shock if replacing it. Typically, this involves unscrewing the shock’s mounting bolts. Make sure to keep the hardware as it may be reused.
3. Install the Monarch RT3 shock: Align the shock’s mounting eyelets with the frame’s shock mount points. Insert the shock and secure it using the appropriate bolts. Torque the bolts according to the manufacturer’s recommendations to avoid over-tightening, which could damage the frame or shock.
4. Check the air pressure: Use a shock pump to set the air pressure according to your body weight and riding style. The correct air pressure will ensure proper sag and provide the right support during riding.
5. Reassemble the bike: After installing the shock, reassemble any parts of the bike that were removed during the process, such as the rear wheel or rear derailleur. Double-check all bolts for tightness.

Tools Required

• 5mm Allen wrench [paid link]
• Shock pump
• Torque wrench [paid link]
• Bike stand [paid link] (optional but recommended)
• Grease (optional, for hardware installation)

Adjusting the Monarch RT3 Rear Shock

The Monarch RT3 rear shock is equipped with three distinct compression damping settings that allow riders to tailor their suspension to different trail conditions and riding styles.

Understanding the Three Modes

1. Open Mode: This setting provides the maximum amount of suspension travel, ideal for rough terrain. It allows the shock to absorb impacts and provide excellent comfort during descents.
2. Pedal Mode: In this mode, the shock reduces unwanted bobbing during pedaling, improving efficiency on smoother terrain while still offering some cushioning.
3. Lockout Mode: The lockout mode completely stiffens the shock, providing a firm suspension that’s ideal for smooth trails or climbing.

Setting the Compression

The Monarch RT3 features an adjustable rebound and compression system. For compression settings, follow these steps:

1. Set the rebound: Adjust the rebound damping first, ensuring that the shock returns slowly enough to keep your wheel in contact with the ground.
2. Adjust compression damping: Use the compression adjuster knob to fine-tune the amount of damping in each mode. Rotate the knob to increase or decrease resistance based on your preferences.

Fine-tuning for Performance

For riders who want to further optimize their suspension performance, consider adjusting the air pressure to match your weight and riding style. A higher air pressure results in a firmer shock, while a lower pressure offers more plushness. To determine the best air pressure, perform a “sag” test to ensure proper suspension setup.

Maintenance of the Monarch RT3 Rear Shock

Regular Maintenance Tips

To keep your Monarch RT3 rear shock in peak condition, follow these maintenance guidelines:

• Air pressure checks: Regularly check the air pressure and adjust it to maintain optimal performance. The Monarch RT3 is sensitive to changes in air pressure, so ensure it is set according to your weight and riding conditions.
• Clean after rides: Clean the shock with a soft cloth to remove dirt and debris. Avoid using harsh chemicals or high-pressure water, as these can damage the shock’s seals.
• Lubricate the shock: Apply a small amount of suspension fluid to the shock’s moving parts to keep it lubricated. This helps maintain smooth performance, especially during long rides.
• Inspect for leaks: Check the shock’s seals regularly for signs of wear or leaks. If you notice any fluid leakage, it may be time to service the shock.

Service Intervals

While the Monarch RT3 rear shock is designed for durability, periodic servicing is required to ensure long-lasting performance. It’s recommended to service the shock once a year, or more frequently if riding in harsh conditions. Regular maintenance includes inspecting internal seals, replacing worn parts, and refreshing the oil for smooth damping action.

Troubleshooting Common Setup Issues

Poor Shock Performance

If your Monarch RT3 rear shock is not performing as expected, here are some common causes and solutions:

• Incorrect air pressure: If the shock feels too firm or too soft, adjust the air pressure to suit your body weight and riding style.
• Inadequate rebound damping: If the shock feels too slow or too fast when returning, adjust the rebound knob to the correct setting.
• Shock not locking out properly: If the shock does not lock out effectively, check for any debris in the lockout mechanism or low oil levels.

Noisy Shock

A noisy rear shock can be a sign of dirt or lack of lubrication. To address this, clean the shock thoroughly and apply suspension grease to the stanchion to prevent friction and noise.

Customization and Optimization for Better Performance

The Monarch RT3 offers several opportunities for customization to enhance ride quality:

• Adjusting air pressure: Customizing air pressure allows you to tune the shock for your preferred feel. Heavier riders may benefit from higher air pressures for firmer support, while lighter riders may prefer lower pressures for increased comfort.
• Rebound settings: Fine-tuning rebound can significantly impact how your bike handles rough terrain. A faster rebound is ideal for smoother trails, while a slower rebound is more suitable for aggressive descents.
• Compression adjustments: Riders can adjust the compression settings to reduce pedal bob or improve suspension performance on downhill runs. Switching between open, pedal, and lockout modes gives flexibility for various conditions.

Comparison with Similar Models

When comparing the Monarch RT3 to other rear shock models, there are a few key differences:

• Monarch RT3 vs. Monarch Plus: The Monarch Plus features a larger air volume and more travel options, making it more suitable for aggressive riders. The RT3 is lighter and provides a more efficient ride for cross-country and all-mountain riders.
• Monarch RT3 vs. Fox Float DPS: The Fox Float DPS offers similar adjustability, but the Monarch RT3 is often considered more durable for riders who prioritize reliability over weight savings.

Compatibility with Other Drivetrain Components

The Monarch RT3 rear shock is compatible with most mountain bike frames that support a standard shock size. It can be paired with a wide range of drivetrain components, including Shimano and SRAM systems. However, when upgrading or installing this shock, ensure the shock mount size and frame clearance are compatible with your bike’s geometry and suspension setup.