Fixing Chain Drops on Gravel Bikes with Advent RD-M6195M Rear Derailleurs

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Chain drops on gravel bikes can be a frustrating issue for riders, especially during intense riding sessions on rough terrain. One of the key components that can influence chain retention is the rear derailleur, and the Advent RD-M6195M [paid link] from microSHIFT offers several solutions to mitigate these problems. This guide will explore how to install, adjust, and maintain the Advent RD-M6195M derailleur, troubleshoot common issues, optimize its performance, and ensure compatibility with other drivetrain components.

Tools Required

  • 5mm Allen wrench
  • Chain checker tool
  • Screwdrivers (flathead and Phillips)
  • Torque wrench
  • Chain whip
  • Freewheel tool
  • 10mm and 12mm wrenches
  • Chain tool
  • Lubricant

Installation of Advent RD-M6195M Rear Derailleur

Step 1: Remove the Old Rear Derailleur

Before installing the Advent RD-M6195M, you must first remove the existing rear derailleur. Use a 5mm Allen wrench to disconnect the derailleur from the derailleur hanger, and then remove the chain from the bike. If the derailleur is still attached to the chain, use a chain tool to break the chain.

Step 2: Install the New Rear Derailleur

Attach the Advent RD-M6195M to the derailleur hanger using the 5mm Allen wrench. Ensure the derailleur hanger is properly aligned to avoid stress on the derailleur. After securing it, attach the chain to the derailleur, ensuring the chain follows the correct path through the jockey wheels. Tighten the derailleur bolts to the manufacturer’s recommended torque setting using a torque wrench.

Step 3: Set the Chain Length

Measure the chain length to match the largest cog and chainring. Adjust the chain length as needed by either removing or adding links. A chain that is too long or too short can lead to chain drops, so ensure that it is properly sized.

Step 4: Install the Rear Wheel and Test the Movement

Once the derailleur is installed, insert the rear wheel and check that the derailleur moves smoothly across all the gears. Pay particular attention to the chain’s movement on the largest and smallest cogs. The Advent RD-M6195M is designed to accommodate wide-range cassettes, making it suitable for gravel bikes with large gear ranges.

Adjusting the Advent RD-M6195M Derailleur for Optimal Performance

Step 1: Set the High and Low Limit Screws

The high and low limit screws control how far the derailleur can travel on the cassette. Adjust these screws to prevent the derailleur from overshooting and dropping the chain off the cassette. Turn the high limit screw (marked H) to adjust the derailleur’s position when it’s in the smallest cog, and adjust the low limit screw (marked L) to set the position when the chain is in the largest cog.

Step 2: Adjust the B-Tension Screw

The B-tension screw adjusts the angle of the derailleur in relation to the cassette. Set it so that the derailleur’s jockey wheels maintain an appropriate gap from the largest cog. If the gap is too wide, the chain may drop off the cogs, while a gap that is too narrow can lead to excessive wear.

Step 3: Fine-tune the Cable Tension

Ensure the rear derailleur moves crisply between gears by fine-tuning the cable tension. Use the barrel adjuster to make small adjustments in the cable tension. Tightening the barrel adjuster increases the tension, while loosening it decreases the tension. A properly tensioned cable ensures smoother shifting and reduces the likelihood of chain drops.

Troubleshooting Common Chain Drop Issues

Issue 1: Chain Drops on the Largest Cog

If your chain drops off the largest cog, it could indicate that the high limit screw is not set correctly. Adjust the high limit screw by turning it clockwise to limit the derailleur’s range, preventing it from overshooting the cassette.

Issue 2: Chain Drops on the Smallest Cog

A common issue is the derailleur overshooting the smallest cog, causing the chain to drop. This could be due to an incorrect setting of the low limit screw. Check that the low limit screw is set so the derailleur does not move past the smallest cog.

Issue 3: Poor Shifting Performance

If the shifting is sluggish or not precise, it may be due to incorrect cable tension or a misaligned derailleur hanger. Double-check the cable tension using the barrel adjuster and ensure that the derailleur hanger is perfectly aligned to avoid shifting issues that can lead to chain drops.

Issue 4: Chain Slapping or Dropping in Bumpy Terrain

Chain slapping or dropping can occur when riding on rough terrain if the derailleur’s jockey wheels are misaligned or too far from the cassette. Adjust the B-tension screw to ensure the derailleur is in the optimal position to handle gravel or rough paths without causing the chain to slip off.

Customization and Optimization for Better Performance

Wide-Range Cassettes and Chain Compatibility

The Advent RD-M6195M is compatible with wide-range cassettes, which are essential for gravel bikes that demand versatility in shifting over rough and varied terrain. It is recommended to use a 10-speed chain that is specifically designed for wider ranges. Additionally, choosing a cassette with a larger largest cog will ensure that the derailleur performs efficiently over long climbs or rough stretches.

Chain Retention Upgrades

To further reduce the risk of chain drops, consider installing a chain retention device such as a clutch-equipped derailleur hanger. The Advent RD-M6195M already includes a clutch mechanism that helps hold the chain in place, but adding a chain guide can further enhance chain retention during aggressive riding.

Shifting Performance Enhancements

For even smoother shifting, you can upgrade the derailleur pulleys to higher-quality ceramic options. These reduce friction and improve the overall responsiveness of the derailleur, allowing for quicker and more accurate shifts, especially under load.

Compatibility with Other Drivetrain Components

The Advent RD-M6195M rear derailleur is designed to work seamlessly with microSHIFT’s 10-speed drivetrain components. It is also compatible with other 10-speed drivetrains from different brands, but it’s important to ensure that the shifter, cassette, and chain are all designed for 10-speed operation to avoid shifting issues or chain compatibility problems.

Additionally, if you’re upgrading from a different model or brand, make sure that the derailleur hanger is compatible with the RD-M6195M. The derailleur hanger must be correctly aligned and strong enough to support the additional torque that may be experienced during off-road riding.

Conclusion

By properly installing, adjusting, and maintaining the Advent RD-M6195M rear derailleur, riders can significantly reduce chain drops and enhance overall shifting performance on gravel bikes. Troubleshooting common issues such as poor shifting or chain drops can be easily addressed by fine-tuning the derailleur settings. Customizing the setup with chain retention devices and ensuring compatibility with other components further optimizes the performance of this durable and versatile derailleur.