The Monarch Plus RC3 rear shock from RockShox is a high-performance, air-sprung shock designed for aggressive trail and enduro riders. Known for its robust design, versatile adjustability, and superior damping performance, the Monarch Plus RC3 provides excellent control, comfort, and durability in challenging terrain. This guide will walk you through the installation, adjustment, maintenance, troubleshooting, customization, and compatibility of the Monarch Plus RC3 rear shock.

Tools Required

• 5mm Allen wrench [paid link]
• 10mm socket wrench
• Torque wrench [paid link]
• Shock pump
• Small brush or rag for cleaning
• Teflon tape (optional for mounting hardware)
• 2.5mm Allen wrench [paid link] (for damper adjustments)
• Isopropyl alcohol (for cleaning shock body)
• Grease (for hardware and mounts)

Installation of the Monarch Plus RC3 Rear Shock

Installing the Monarch Plus RC3 rear shock requires careful attention to detail to ensure proper fitment and optimal performance. Follow these steps:

1. Prepare the Rear Triangle
   Clean the rear triangle of your bike frame thoroughly, ensuring no debris or dirt remains on the mounting surfaces.
2. Install the Mounting Hardware
   Ensure that all mounting hardware, such as the shock eyelets and bolts, are clean and greased. Some frames may require specific adapters, so refer to your bike’s manual for the exact specifications.
3. Attach the Shock
   Position the shock in the rear triangle and align the eyelets with the mounting holes on the frame. Secure the shock in place using the bolts and tighten them to the recommended torque settings (typically 8–10Nm for most bikes).
4. Attach the Lower Shock Mount
   Similarly, install the lower shock mount. Again, use the appropriate torque settings, ensuring the bolts are securely fastened.
5. Check for Proper Clearance
   Make sure that the shock is properly seated and that there’s adequate clearance between the shock and any surrounding frame components (e.g., seat stays or chainstays). Verify that the shock has full travel without any obstruction.
6. Set Up the Air Pressure
   Using a shock pump, set the correct air pressure according to your weight and riding style. The Monarch Plus RC3 typically requires a higher air pressure for aggressive riders or riders with more weight. Refer to the RockShox guide for a baseline pressure range.
7. Check for Leaks
   After installation, check the shock for any visible air leaks. If you notice any air escaping, ensure that all air valve connections are tight.

Adjustments for Optimal Performance

The Monarch Plus RC3 offers several adjustment options that can be tailored to your riding style and trail conditions. Here’s how to adjust each feature:

Rebound Damping Adjustment

1. Locate the Rebound Knob
   The rebound knob is located at the bottom of the shock. Turning it clockwise increases rebound damping, while turning it counterclockwise decreases rebound damping.
2. Adjust for Your Riding Style
   A slower rebound (clockwise) helps with control and stability on rough terrain, while a faster rebound (counterclockwise) provides more comfort on smoother trails. Start with the knob set to the mid-point and make adjustments based on feedback during your ride.

Compression Damping Adjustment (Open/Medium/Lockout)

1. Adjust the Compression Knob
   The Monarch Plus RC3 offers a three-position compression knob located on the top of the shock. This knob controls low-speed compression damping, which affects how the shock responds to small hits and pedal-induced forces.
2. Adjust for Trail Conditions
   • Open Mode (fully counterclockwise): Ideal for aggressive descents and technical trails.
   • Medium Mode: Provides a balance between comfort and efficiency on rolling terrain.
   • Lockout Mode (fully clockwise): Prevents any suspension movement, ideal for climbing or smooth terrain.

Air Pressure Adjustment

1. Set the Proper Air Pressure
   The Monarch Plus RC3 is an air-sprung shock, and adjusting the air pressure is crucial to achieving proper sag and bottom-out resistance. Use a shock pump to adjust the air pressure to your weight and riding style.
2. Check for Sag
   Aim for 25-30% of sag for trail riding. If you experience bottoming out or an overly harsh ride, adjust the air pressure accordingly.

Maintenance and Care

Maintaining your Monarch Plus RC3 is crucial to keeping it in top condition and extending its lifespan. Here are some essential maintenance tasks:

Cleaning

1. Wipe Down the Shock
   After each ride, clean the shock using a soft rag to remove dirt and debris. Avoid using abrasive materials that could scratch the shock body.
2. Check the Air Valve
   Inspect the air valve for any damage or leakage. If you notice any issues, replace the valve cap or seal before using the shock again.

Lubrication

1. Grease Mounting Hardware
   Apply a thin layer of grease to the mounting hardware to prevent seizing and ensure smooth performance during compression and rebound cycles.
2. Check for Dirt Buildup
   Regularly inspect the shock eyelets and the shock body for any dirt buildup, especially around the seals. Use a small brush to clean these areas.

Full Suspension Service

1. Annually Servicing the Shock
   Depending on your riding frequency and conditions, servicing the Monarch Plus RC3 shock once a year is recommended. This includes replacing the oil, seals, and performing an internal inspection for wear and tear.
2. Shock Specialist
   If you notice any performance issues that can’t be addressed through basic maintenance, such as a loss of damping, it’s best to take the shock to a certified RockShox service center.

Troubleshooting Common Issues

Despite its robust design, you may encounter some common issues with the Monarch Plus RC3. Here’s how to troubleshoot:

Lack of Rebound Control

• Possible Cause: The rebound knob might not be set correctly or the damper could be under-serviced.
• Solution: Adjust the rebound knob to find the correct setting. If this doesn’t resolve the issue, the damper may need to be serviced or replaced.

Bottoming Out Frequently

• Possible Cause: Insufficient air pressure or the shock not providing enough support.
• Solution: Check and adjust the air pressure according to your weight and riding style. Increase the pressure slightly if necessary.

Leakage from the Air Valve

• Possible Cause: A damaged or loose air valve.
• Solution: Tighten the valve cap or replace the valve if damaged.

Customization for Better Performance

The Monarch Plus RC3 can be customized for a more personalized ride experience. These changes are typically aimed at improving performance based on terrain and individual preferences:

• Custom Air Spring Tuning: Adjusting the air spring can help you fine-tune the shock’s feel. Consider experimenting with different air pressures to achieve the ideal balance between comfort and support.
• Damping Tuning: You can further adjust the compression and rebound damping to fit your specific riding needs. This is especially important if you plan to ride different types of trails (e.g., technical, fast, or rocky).
• Mounting Configuration: Depending on your bike’s frame and geometry, experimenting with different mounting options can alter the suspension dynamics to better suit your riding style.

Compatibility with Other Drivetrain Components

The Monarch Plus RC3 is designed to work seamlessly with most modern mountain bike drivetrains. However, compatibility can vary depending on the specific frame and suspension design. Always check the specifications of your frame and rear triangle before installation.

• Frame Compatibility: The shock works well with most standard bike frames with an eyelet size that matches the Monarch Plus RC3 specifications. Ensure the shock’s eyelet size and stroke length match your frame requirements.
• Drivetrain Compatibility: The shock will not directly interfere with your bike’s drivetrain but ensure there is adequate clearance for your cassette, chain, and derailleur.

Comparison with Similar Models

When compared to other rear shocks, the Monarch Plus RC3 stands out due to its versatile damping options and robust air spring design. Here’s a brief comparison:

• Monarch Plus RC3 vs. RockShox Super Deluxe: The Super Deluxe features a more advanced damper system, offering better performance on aggressive descents, but at a higher price point.
• Monarch Plus RC3 vs. Fox DPX2: Both shocks are highly adjustable, but the Fox DPX2 offers slightly more customization options for damping, while the Monarch Plus RC3 excels in ease of use and reliability for general trail and enduro riding.

The Monarch Plus RC3 is an excellent choice for riders seeking a reliable, adjustable rear shock with great performance on rough trails, providing a good balance between performance and value.