How to Install, Adjust, and Maintain the RD-4700 Rear Derailleur

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in Rear Derailleur, Shimano, Tiagra

The Shimano RD-4700 [paid link] rear derailleur, part of the Tiagra 4700 groupset, offers smooth and precise shifting with a design influenced by Shimano’s higher-end groupsets. It uses the same cable pull ratio as 10-speed Shimano road derailleurs but is optimized for 11-speed shifters, making it a unique choice for riders looking to upgrade or maintain their drivetrain.

This guide covers the installation, adjustment, and maintenance of the RD-4700 [paid link], ensuring that you achieve flawless shifting and extend the life of your components. We’ll also highlight common setup issues and provide solutions to keep your bike running at peak performance.

Tools Required

Before starting, gather the following tools:

  • 5mm Allen wrench [paid link]
  • Phillips-head screwdriver
  • Torque wrench [paid link] (for precise adjustments)
  • Chain breaker tool
  • Cable cutters
  • Ruler (for derailleur alignment)
  • Lubricant and degreaser
  • Clean rag

Step 1: Installing the RD-4700 Rear Derailleur

1.1. Preparing the Frame and Hanger

The derailleur hanger is a critical component that affects shifting accuracy. Before installation:

  • Ensure the hanger is straight using a derailleur alignment gauge.
  • Clean the hanger threads to remove any dirt or debris.
  • Apply a small amount of grease to the hanger threads to prevent corrosion.

1.2. Attaching the Rear Derailleur

  • Align the B-link plate (if applicable) with the hanger.
  • Use a 5mm Allen wrench [paid link] to tighten the derailleur to the hanger. Torque spec: 8-10Nm.
  • Verify that the derailleur moves freely without resistance.

Step 2: Installing and Adjusting the Chain

2.1. Determining Chain Length

Proper chain length is crucial for smooth shifting. To determine the correct length:

  • Wrap the chain around the largest front chainring and the largest rear cog, bypassing the derailleur.
  • Add two full links to accommodate derailleur movement.
  • Use a chain breaker tool to remove excess links.

2.2. Routing the Chain

  • Thread the chain through the jockey wheels, ensuring it follows the correct path.
  • Use a quick link or chain pin to reconnect the chain securely.

Step 3: Cable Installation and Adjustment

3.1. Attaching the Shifter Cable

  • Shift the derailleur to the smallest rear cog.
  • Insert the cable through the shifter and into the derailleur’s cable anchor bolt.
  • Pull the cable taut and tighten the anchor bolt securely.

3.2. Setting the High and Low Limit Screws

The limit screws prevent the derailleur from shifting past the first and last cogs.

  • High Limit Screw (H): Adjust so the jockey wheel aligns with the smallest cog.
  • Low Limit Screw (L): Adjust so the jockey wheel aligns with the largest cog.

Step 4: Fine-Tuning the Shifting Performance

4.1. Indexing the Gears

  • Shift to the smallest rear cog and pedal while clicking the shifter up one gear at a time.
  • If shifting is slow, turn the barrel adjuster counterclockwise to add tension.
  • If the chain skips or hesitates, turn the barrel adjuster clockwise to reduce tension.

4.2. B-Tension Adjustment

  • The B-tension screw controls the gap between the upper jockey wheel and the cassette.
  • For optimal shifting, set this gap to 5-6mm on a road bike cassette.

Step 5: Common Setup Issues and Fixes

5.1. Chain Skipping on Gears

  • Check for cable stretch and adjust tension using the barrel adjuster.
  • Ensure the cassette and chain are in good condition.

5.2. Slow or Inconsistent Shifting

  • Verify that the derailleur hanger is aligned.
  • Check that the limit screws are not over-tightened.

Step 6: Maintenance Tips for Longevity

6.1. Cleaning and Lubrication

  • Wipe down the derailleur after every ride to remove dirt.
  • Apply light lubrication to the jockey wheels and pivot points.
  • Use a degreaser every few weeks to keep it free of grime.

6.2. Regular Cable and Housing Inspection

  • Replace cables every 6–12 months to prevent fraying.
  • Inspect housing for cracks or wear that may cause friction.

Step 7: Compatibility and Upgrades

The RD-4700 [paid link] rear derailleur is designed for 10-speed Tiagra 4700 shifters but uses the same cable pull ratio as Shimano’s 11-speed road derailleurs. It is not compatible with older 10-speed Shimano road shifters (e.g., 4600, 5700).

Final Thoughts

Proper installation and maintenance of the Shimano RD-4700 rear derailleur will ensure precise shifting and long-lasting performance. By following this guide, you’ll avoid common mistakes and keep your drivetrain running smoothly.