Why Riders Trust the Monarch RT3 Rear Shock

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The RockShox Monarch RT3 rear shock is a popular choice for riders seeking a high-performance, versatile shock absorber for their mountain bikes. Known for its excellent shock absorption, ease of use, and tunability, the Monarch RT3 is a key component for optimizing a rider’s performance on various terrains. This guide will cover the installation, adjustment, maintenance, troubleshooting, and optimization of the Monarch RT3 rear shock. Additionally, it will help you understand its compatibility with other drivetrain components, enabling you to make informed decisions regarding your bike’s setup.

Tools Required

  • 8mm Allen wrench [paid link]
  • 5mm Allen wrench [paid link]
  • Torque wrench [paid link]
  • Shock pump
  • Isopropyl alcohol
  • Cleaning rags
  • 2mm Allen wrench (for adjusting rebound)
  • Grease
  • Protective gloves

Installation of the Monarch RT3 Rear Shock

The installation process of the RockShox Monarch RT3 rear shock is straightforward but requires attention to detail to ensure proper function. Follow the steps below to install the shock correctly.

  1. Remove the Existing Shock (if applicable):
    • Use an 8mm Allen wrench to remove the bolts securing the old shock to the frame.
    • Gently slide the shock out of the rear triangle.
  2. Prepare the New Shock:
    • Before installing the Monarch RT3, check the shock for any shipping debris or oil residue. Clean the shock body using isopropyl alcohol and a soft rag.
    • Apply a thin layer of grease to the mounting hardware on both the top and bottom shock eyes.
  3. Install the Shock:
    • Position the Monarch RT3 shock into the frame’s rear triangle. Ensure the shock is oriented correctly according to the shock mount on your bike.
    • Insert the bolts through the shock mounts and tighten them to the specified torque using a torque wrench [paid link] (usually around 150-175 inch-pounds, depending on the bike frame).
  4. Set the Sag:
    • Inflate the shock to the recommended air pressure (this depends on your weight and riding style).
    • Check the sag by sitting on your bike in a normal riding position. The ideal sag for the Monarch RT3 is typically around 25-30% of the shock’s total travel.

Adjustment of the Monarch RT3 Rear Shock

The Monarch RT3 offers three main adjustments that help riders fine-tune their ride: Rebound, Compression, and Air Pressure. These adjustments help you tailor the shock’s behavior to match your riding style and the conditions.

Rebound Adjustment

The rebound adjustment controls how quickly the shock returns to its original position after being compressed. A proper rebound setting is critical for maintaining control, especially when riding over uneven terrain.

  1. Locate the Rebound Dial: The rebound adjustment knob is located at the bottom of the shock.
  2. Turn the Dial:
    • Turn the dial clockwise for slower rebound (less movement).
    • Turn it counterclockwise for faster rebound (more movement).
  3. Test and Fine-Tune: After adjusting, ride the bike on different terrain to find the ideal rebound setting.

Compression Adjustment

The Monarch RT3 rear shock features a three-position compression adjustment: Open, Medium, and Firm. This allows riders to adjust how much resistance the shock provides during compression.

  1. Set the Desired Compression:
    • Open: Best for maximum comfort and traction, ideal for technical trails.
    • Medium: Balanced for general use and moderate trail conditions.
    • Firm: Best for smooth, fast terrain or when climbing, reducing unnecessary movement.
  2. Adjust for Ride Conditions: Adjust the compression setting depending on the terrain you plan to ride on.

Air Pressure Adjustment

The air pressure is one of the most crucial aspects of shock setup and is directly linked to sag. The Monarch RT3 is an air-sprung shock, and correct air pressure ensures optimal performance.

  1. Determine Ideal Air Pressure: Refer to RockShox’s air pressure chart based on your weight and riding style.
  2. Use a Shock Pump: Use a shock pump to set the correct air pressure. Be cautious to not exceed the maximum pressure rating listed on the shock.

Maintenance of the Monarch RT3 Rear Shock

Proper maintenance ensures the longevity and optimal performance of your Monarch RT3 rear shock. Regular checks and servicing are essential for a smooth ride.

Cleaning and Lubrication

  • Clean the Shock Regularly: Use isopropyl alcohol and a clean rag to wipe down the shock body. Pay attention to the seals and eyelets to remove dirt and grime.
  • Lubricate the Mounting Hardware: Apply grease to the shock eyelets and bolts during each installation to prevent wear and tear.

Air Can Service

Over time, air can seals can wear out, causing air loss and reduced performance. Servicing the air can is essential for maintaining proper air pressure and shock responsiveness.

  1. Remove the Shock from the Frame: Carefully remove the shock from the bike frame.
  2. Disassemble the Shock: Follow the manufacturer’s guidelines for disassembling the air can from the shock body.
  3. Inspect and Replace Seals: Check for any worn seals and replace them as necessary. RockShox offers a seal kit for this purpose.
  4. Reassemble and Test: After replacing seals, reassemble the shock, set the correct air pressure, and test its performance on the bike.

Troubleshooting Common Setup Issues

Even with careful installation and setup, some common issues may arise with the Monarch RT3 rear shock. Here are a few troubleshooting tips.

Loss of Air Pressure

If you notice a drop in air pressure, check for any visible leaks around the seals or valves. Over time, small leaks can develop, especially in older shocks. If a seal appears damaged, it’s best to replace it with a new one.

Inconsistent Rebound

If the rebound is inconsistent or too slow, check that the rebound dial is not set too aggressively. Make sure the shock is properly lubricated and that no dirt has accumulated around the rebound adjuster.

Noise from the Shock

If you hear squeaks or creaks, ensure that all mounting hardware is tightened to the manufacturer’s recommended torque setting. Noises can also occur if the shock has not been properly lubricated or if there is dirt in the bushings.

Customization and Optimization for Better Performance

To optimize the Monarch RT3 for your specific riding needs, you can customize its settings and consider upgrading certain components.

Volume Spacers

The Monarch RT3 features volume spacers, which control the progression of the shock’s travel. Adding or removing spacers can adjust how the shock behaves at the end of its stroke, allowing for more or less bottom-out resistance.

  1. Add Spacers: If you prefer a more progressive feel, add spacers to reduce bottom-out and increase control during high-impact drops.
  2. Remove Spacers: For a more linear feel, removing spacers allows the shock to compress more freely through its travel.

Spring Rate Adjustments

For riders who prefer a more customized feel, adjusting the spring rate is another option. This involves either changing the air pressure or swapping out the shock’s air can for one with a different volume.

Compatibility with Other Drivetrain Components

The Monarch RT3 rear shock is designed to work seamlessly with a variety of drivetrain components. However, it’s important to check for compatibility between the shock and other suspension parts, especially when upgrading or swapping components.

  1. Frame Compatibility: The Monarch RT3 is compatible with most modern mountain bike frames that use a standard rear shock mount. Always verify the shock’s dimensions and the bike’s shock mount specifications before purchasing.
  2. Drivetrain Integration: The shock’s performance is influenced by the overall suspension setup, including the front fork and linkage. For optimal performance, ensure your front fork and rear shock are of similar quality and setup.

Conclusion

The RockShox Monarch RT3 rear shock is an excellent choice for riders seeking a reliable, adjustable shock absorber that performs well on a variety of terrains. With its easy setup, customizable adjustments, and durability, the Monarch RT3 offers riders the ability to fine-tune their ride for maximum comfort and performance. Whether you’re installing it on a new bike or maintaining an existing setup, the Monarch RT3 is a dependable component that delivers an enhanced riding experience.