How to Install, Adjust, and Maintain the PC-GX Chain

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in Chains, SRAM

The PC-GX [paid link] chain is a crucial component of SRAM’s GX Eagle drivetrain, offering durability, precision shifting, and excellent power transfer. Whether you’re upgrading or replacing your chain, proper installation and maintenance are essential to ensure longevity and smooth performance.

This guide will take you through step-by-step installation, adjustment techniques, and essential maintenance tips for your PC-GX [paid link] chain. You’ll also learn how to troubleshoot common issues, optimize performance, and prevent premature wear.

Tools Required

Before starting, gather the necessary tools:

  • Chain breaker tool
  • Master link pliers (for quick link removal and installation)
  • Chain wear indicator
  • Torque wrench [paid link]
  • Degreaser and chain cleaning brush
  • Dry or wet chain lubricant (depending on riding conditions)
  • Clean rag

Understanding the PC-GX Chain

The PC-GX [paid link] chain is designed for SRAM’s 12-speed Eagle drivetrain. It features solid-pin construction for strength and Flow Link technology, which minimizes friction and improves shifting performance. The chain comes with a PowerLock master link, allowing for easy installation without special tools.

Key specifications:

  • Speed: 12-speed
  • Material: Nickel-plated outer plates for corrosion resistance
  • Pin type: Solid pins for durability
  • Compatibility: SRAM Eagle 12-speed drivetrains

Step-by-Step Installation of the PC-GX Chain

1. Measure and Size the Chain

A new chain needs to be cut to the correct length before installation. Follow these steps:

  • Shift to the smallest chainring and smallest rear cog to get a clear view of chain sizing.
  • Route the chain around the largest cassette cog and chainring, bypassing the derailleur.
  • Add two full links (one inner and one outer link) beyond the point where the chain meets.
  • Mark the correct length and use a chain breaker tool to remove excess links.

2. Install the Chain on the Drivetrain

  • Carefully thread the chain through the derailleur pulleys, ensuring correct routing.
  • Align the two ends and connect them using the PowerLock master link.

3. Secure the PowerLock Master Link

  • Align the quick link and pull both ends of the chain together.
  • Rotate the pedals backward until the master link is positioned on the top of the chainring.
  • Apply downward force on the pedal to fully seat the quick link.

Adjusting the PC-GX Chain for Optimal Performance

1. Check Chain Tension and Alignment

  • Shift through the gears to ensure smooth engagement with the cassette.
  • Inspect chain tension—there should be minimal slack but not excessive tightness.
  • If the chain feels too tight or too loose, adjust B-screw tension on the derailleur.

2. Fine-Tune Rear Derailleur Position

A misaligned derailleur can cause skipping, poor shifting, and chain noise. Adjust:

  • High and low limit screws to prevent chain overshifting.
  • B-screw tension to control chain gap over the largest cog.
  • Cable tension for precise indexing with the shifter.

Essential Maintenance Tips for the PC-GX Chain

1. Regular Cleaning to Extend Chain Life

Dirt and debris can wear down your chain prematurely. To clean your PC-GX chain:

  • Use a degreaser and chain cleaning brush to remove grime.
  • Wipe the chain with a clean, dry rag to remove excess cleaner.
  • Allow the chain to dry completely before applying lubricant.

2. Proper Lubrication for Smooth Operation

Choose wet lube [paid link] for muddy or wet conditions and dry lube [paid link] for dry and dusty trails. Apply lubricant by:

  • Rotating the crank backward while applying a thin layer of lubricant.
  • Letting the lube sit for a few minutes, then wiping off excess with a rag.

3. Checking for Wear and Stretch

A worn-out chain can damage your cassette and chainrings. Use a chain wear indicator every few weeks:

  • If wear is at 0.5%, consider replacing the chain soon.
  • At 0.75% or higher, replace immediately to prevent drivetrain wear.

Troubleshooting Common PC-GX Chain Issues

1. Chain Skipping or Slipping Under Load

  • Ensure the cassette and chainring teeth aren’t excessively worn.
  • Check for proper chain length—an overly long chain can cause skipping.
  • Inspect rear derailleur hanger alignment for any bends.

2. Noisy or Rough Shifting

  • Clean and lubricate the chain properly.
  • Check derailleur indexing—it may need fine-tuning.
  • Ensure PowerLock master link is fully seated.

Conclusion

The PC-GX chain is a high-performance component designed for SRAM’s 12-speed Eagle drivetrain. Proper installation, adjustment, and maintenance ensure smooth shifting, increased durability, and optimized performance.

By following the right cleaning and lubrication routines, checking for chain wear, and troubleshooting common issues, you’ll keep your drivetrain running efficiently for thousands of miles.