The Monarch RT3 rear shock from RockShox is a popular choice among cyclists for its impressive performance and reliability. However, like all high-performance components, it requires regular maintenance to ensure it operates at its best for years. This guide will walk you through the key aspects of preventative maintenance for the Monarch RT3 rear shock, including installation, adjustment, troubleshooting, customization, and ensuring compatibility with other drivetrain components.

Tools Required

• Shock pump
• 8mm hex wrench
• Torque wrench [paid link]
• Phillips screwdriver
• Isopropyl alcohol or cleaning solvent
• Soft cloth or rag
• Lubricant (appropriate for shock components)
• 5mm hex wrench (for linkage and mounting hardware)

Installation of the Monarch RT3 Rear Shock

Installing the RockShox Monarch RT3 rear shock requires a precise approach to ensure correct fitment and optimal performance. Below are the key steps for a successful installation:

1. Remove the Old Shock: Before installing the Monarch RT3, ensure that your bike’s rear triangle is supported to prevent any damage while removing the old shock. Use the appropriate wrenches to undo the mounting bolts at both ends of the shock.
2. Install the New Shock: Align the Monarch RT3 with the bike’s frame and install it into the rear triangle. Make sure the shock is correctly aligned with the mounting hardware. Tighten the bolts with the recommended torque settings using a torque wrench [paid link] to avoid over-tightening.
3. Set the Air Pressure: Use a shock pump to set the air pressure in the Monarch RT3. The recommended air pressure varies depending on the rider’s weight, so refer to the manufacturer’s guidelines or use a rider weight calculator for accurate pressure settings.
4. Check for Proper Movement: Once installed, check the shock for proper movement. Compress it and ensure that it smoothly rebounds. The shock should not bind or make any strange noises during operation.

Adjustment of the Monarch RT3 Rear Shock

The Monarch RT3 features the renowned Rapid Recovery rebound system and the adjustable three-position compression damper. To optimize the performance of your shock, you’ll need to make the following adjustments based on your riding style and terrain:

Compression Adjustment

1. Open Mode: Ideal for downhill and aggressive riding, this setting provides maximum suspension travel and a soft feel.
2. Pedal Mode: Best for cross-country riding, where efficiency is key. It firms up the shock to prevent excessive sag during pedaling.
3. Lockout Mode: This mode is for climbing or road riding, where you need to minimize suspension movement for maximum pedaling efficiency.

Rebound Adjustment

Adjusting the rebound controls how quickly the shock returns to its normal position after compression. Turn the rebound knob clockwise to slow down the rebound, and counterclockwise to speed it up. Fine-tune the rebound setting to match the terrain, ensuring the shock returns at an appropriate speed to maintain control and comfort.

Preventative Maintenance Tasks

Regular maintenance is crucial to keep your Monarch RT3 rear shock in top condition. Here’s a schedule of tasks you should perform:

Cleaning

• Frequency: Clean your shock after every ride, particularly if you’ve been riding in muddy or wet conditions.
• Method: Use a soft cloth soaked in isopropyl alcohol or cleaning solvent to gently wipe down the shock. Avoid abrasive materials that could scratch the surface.
• Seals: Inspect the shock’s seals for any dirt or debris. If necessary, clean around the seals to prevent contamination that could damage the shock over time.

Air Spring Pressure Checks

• Frequency: Check the air spring pressure at least once a month or before long rides.
• Why: As air naturally escapes from the shock over time, maintaining the correct air pressure ensures the shock performs as designed.
• Adjustment: If you notice any loss in performance or sag, use a shock pump to adjust the air pressure to match your weight and riding style.

Lubrication of Components

• Frequency: Lubricate the Monarch RT3’s air sleeve and internal components at least once every 50 hours of riding or annually.
• Why: Proper lubrication keeps the internal moving parts running smoothly, preventing wear and tear.
• Method: Remove the air sleeve and lightly lubricate the shaft and piston. Use a lubricant specifically designed for suspension systems to ensure compatibility and long-lasting performance.

Seal Replacement

• Frequency: Inspect the shock’s seals every 100 hours of riding or every season. Replace seals if you notice any degradation, such as leaking oil or air loss.
• Why: Seals prevent dirt and moisture from entering the shock, keeping the internals clean and free of contaminants that could impair performance.
• Method: Carefully remove and replace seals as needed using the appropriate tools. Follow the manufacturer’s instructions for the correct seal replacement procedure.

Troubleshooting Common Issues

Air Leaks

• Symptom: If you notice that the shock is losing air pressure, it may indicate a problem with the seals or air valve.
• Solution: Inspect the air valve and seals for signs of damage. If there are no obvious issues, try a different shock pump to rule out the possibility of an issue with the pump itself. If air loss persists, contact a professional mechanic for seal replacement.

Loss of Rebound Control

• Symptom: If the shock does not rebound correctly or too quickly, it may indicate a problem with the rebound circuit or the internal damper.
• Solution: Check the rebound setting and adjust it according to the riding conditions. If the issue continues, it may be necessary to service the shock to address internal issues with the damper or rebound components.

Lack of Compression Damping

• Symptom: If you experience too much suspension movement under pedaling or braking, it might be due to insufficient compression damping.
• Solution: Adjust the compression settings to a firmer setting to reduce excessive travel. If the issue persists even after adjustment, check for air pressure problems or internal damage to the compression damper.

Customization and Optimization for Performance

To get the best performance from your Monarch RT3 rear shock, consider these optimization tips:

Fine-Tuning Suspension Settings

• Air Pressure: Adjust the air pressure based on your weight and the type of terrain you ride. Lower pressures offer more comfort, while higher pressures provide a firmer, more efficient feel.
• Rebound and Compression: Customize the rebound and compression settings to suit your preferred riding style. For instance, a slower rebound setting might be preferred for downhill trails, while faster rebound could be ideal for cross-country riding.

Upgrade Parts for Better Performance

If you’re looking to improve the performance of your Monarch RT3, consider upgrading parts such as the air sleeve, seals, or even the damper. Some riders choose to upgrade to a more advanced damper cartridge for enhanced performance on technical terrain.

Compatibility with Other Drivetrain Components

The Monarch RT3 rear shock is compatible with a wide range of bikes, but it is essential to ensure that it is properly matched with the rest of your drivetrain components. It’s crucial to confirm that the shock’s length, stroke, and mounting type are suitable for your bike’s rear triangle. A shock that is too long or short can result in poor performance or damage to your frame.

When pairing the Monarch RT3 with other drivetrain components such as the rear derailleur or cassette, always verify that the shock does not interfere with these parts’ operation, especially when adjusting the suspension for different riding conditions.

By following this guide, you can maintain and optimize your Monarch RT3 rear shock for peak performance. Proper installation, regular maintenance, and careful adjustments will ensure that your shock remains reliable and delivers the best riding experience.