How to Service Your Monarch R Rear Shock Without a Mechanic

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Servicing your Monarch R rear shock is essential for maintaining optimal performance and prolonging the life of your suspension. Whether you’re a seasoned rider or a beginner, performing basic maintenance tasks yourself can save you time and money, and ensure that your bike rides smoothly. This guide will take you through the steps of servicing your Monarch R rear shock, including installation, adjustment, maintenance, and troubleshooting. By the end of this article, you’ll have the knowledge to take care of your rear shock without needing to visit a mechanic.

Tools Required

  • Torque wrench [paid link]
  • 5mm and 8mm Allen wrenches [paid link]
  • Shock pump
  • Cleaning supplies (rags, brushes)
  • 2.5mm hex key [paid link]
  • Suspension fluid (RockShox recommended)
  • Shock-specific seals or rebuild kit (if needed)
  • 8mm or 10mm spanner for the air canister
  • Latex or nitrile gloves (to avoid contamination)
  • Soft surface (workbench or clean towel)

Understanding the Monarch R Rear Shock

The RockShox Monarch R is a versatile, air-sprung rear shock that delivers an efficient and smooth performance for cross-country and trail riders. It features a solo air spring system, which means that both positive and negative air chambers are controlled by a single Schrader valve. The Monarch R also uses an external rebound adjustment to fine-tune the shock’s performance based on the rider’s preferences. Regular servicing of this shock ensures it continues to perform at its best and extends its lifespan.

Step-by-Step Guide to Servicing Your Monarch R Rear Shock

1. Preparation and Removal

Before beginning the service, ensure that your bike is stable, either by using a workstand or laying it on a clean surface. You’ll need to remove the rear shock from the bike before you can service it.

  • Use the appropriate tools to remove the shock from the bike frame. Typically, this will involve loosening the bolts that secure the shock at the top and bottom eyelets using a 5mm or 8mm Allen wrench [paid link].
  • Set the shock aside in a clean, soft area to prevent any damage.

2. Cleaning the Shock

Before you begin any work on the rear shock, cleaning it thoroughly is essential. Dirt and debris can enter the shock’s internal components and cause excessive wear.

  • Using a rag or soft brush, clean the external surfaces of the shock. Focus on removing dirt and grime around the shock’s body, seals, and eyelets.
  • Be sure not to use any harsh chemicals or cleaners, as they can damage the shock’s seals. A gentle degreaser or water-based cleaner works best.
  • Check the seals for visible damage, such as tears or cracks. If you notice any damage, you will need to replace the seals.

3. Rebound Adjustment

The Monarch R rear shock comes equipped with a rebound adjustment, allowing you to control how quickly the shock returns after compression. Adjusting the rebound can drastically affect the ride feel and control of the bike.

  • Set the rebound to its slowest position (turn the knob fully clockwise) before beginning your service.
  • After the service, you can adjust it to your preference by turning the knob counterclockwise. A good starting point is typically to turn it about 10 clicks counterclockwise from the fully clockwise position.

4. Air Pressure Adjustment

The Monarch R uses a solo air system, meaning both the positive and negative air chambers share a single Schrader valve. Proper air pressure is crucial for achieving the desired ride characteristics.

  • Use a shock pump to set the air pressure in the Monarch R rear shock. Refer to the manufacturer’s recommendations for your rider weight and style.
  • First, unscrew the air valve cap and attach the shock pump. The air pressure should be adjusted to match your body weight, ensuring the proper sag for optimal suspension performance.
  • A typical starting point is 30-35% of your total travel, but adjustments should be made based on personal preferences and riding style.
  • After adjusting, check the air pressure again to ensure it is accurate.

5. Service the Air Canister

Once you have cleaned the shock and adjusted the air pressure, it’s time to service the air canister. Over time, the air canister seals can wear out, leading to air leakage and decreased performance. Replacing these seals periodically will keep your shock in optimal condition.

  • Use a spanner to carefully remove the air canister from the shock body. Be sure to do this gently, as too much force can damage the shock’s body.
  • Inspect the seals for any wear or damage. If the seals appear worn, you will need to replace them using a seal kit specific to the Monarch R.
  • Apply a small amount of suspension fluid to the new seals before reassembly to ensure smooth movement and proper sealing.

6. Reassembly

Once you’ve serviced the air canister and seals, it’s time to reassemble the shock.

  • Carefully reinstall the air canister onto the shock body, ensuring the new seals are correctly positioned.
  • Tighten the air canister to the shock body using the spanner, being cautious not to overtighten. Follow the torque specifications outlined by RockShox to prevent any damage.

7. Final Check and Reinstallation

Before reinstalling the rear shock onto your bike, perform a final check of the shock’s function.

  • Check the air pressure again, ensuring that it is set according to your preferences.
  • Press on the shock to check for smooth compression and rebound. If there is any binding or unusual resistance, you may need to disassemble the shock again to inspect for issues.

Once satisfied with the shock’s condition, reinstall it onto your bike frame. Tighten the eyelet bolts to the manufacturer’s torque specifications.

Troubleshooting Common Issues

Despite regular maintenance, you might encounter some common issues with your Monarch R rear shock. Here are a few things to check if you’re experiencing problems.

1. Loss of Air Pressure

  • Possible Cause: Damaged seals or valve.
  • Solution: Inspect the air canister seals and replace them if they’re damaged. Ensure the Schrader valve is properly seated and not leaking.

2. Poor Rebound Control

  • Possible Cause: Incorrect rebound setting or oil contamination.
  • Solution: Check that the rebound knob is set correctly. If it still feels off, the shock might need to be completely disassembled and cleaned internally, especially if dirt or debris has entered.

3. Suspension Sag

  • Possible Cause: Incorrect air pressure or worn-out seals.
  • Solution: Recheck the air pressure and adjust it based on your weight and riding style. If the sag remains incorrect, inspect the seals and replace if necessary.

Customization and Optimization for Better Performance

The Monarch R rear shock allows for some customization to suit different riding styles and conditions. By tweaking air pressure and rebound settings, you can adjust the shock to optimize performance for specific trails, weights, and riding techniques.

Air Pressure Customization

Adjusting the air pressure can drastically affect the ride. For cross-country riders, a higher pressure may be preferred to reduce sag and provide more efficient pedaling. Trail riders may prefer a slightly lower pressure to allow for more sensitive suspension on technical terrain.

Rebound Adjustments

Fine-tuning the rebound can help with better control on varied terrain. A slower rebound is typically more stable for rough descents, while faster rebound helps with control on smoother trails.

Compatibility with Other Drivetrain Components

The Monarch R rear shock is designed to integrate well with most modern mountain bike drivetrains. However, it is important to ensure compatibility with your bike frame. The shock’s length, travel, and eyelet specifications must match your bike’s suspension design to ensure optimal performance.

When replacing your Monarch R, it’s critical to check the shock’s specifications against your bike’s requirements. Consult the manufacturer’s documentation or a bike shop to confirm that the shock is compatible with your specific setup.

By following this guide, you can service your RockShox Monarch R rear shock independently and confidently. Regular maintenance will ensure that your suspension stays smooth, responsive, and ready for any ride.