The Shimano CN-6701 [paid link] is a high-performance, 10-speed chain designed for road cycling enthusiasts who demand smooth shifting and durability. As part of the Shimano Ultegra 6700-series drivetrain, it features Hollow Pin Technology for reduced weight and optimized ramped inner plates for improved shifting precision. However, incorrect installation or poor maintenance can lead to rapid wear, noisy shifting, and performance issues.
This guide covers the complete installation, adjustment, and maintenance process for the Shimano CN-6701 [paid link] chain. Whether you’re replacing an old chain or setting up a new drivetrain, following these steps will ensure optimal performance and longevity.
Tools Required [paid links]
- Chain tool (compatible with 10-speed chains)
- Quick-link pliers (if using a quick-link)
- Chain wear checker
- Allen wrenches
- Torque wrench (for precise tightening)
- Chain lubricant (wet or dry, depending on riding conditions)
- Clean rag and degreaser
Shimano CN-6701 Chain Installation Guide
Step 1: Determine the Correct Chain Length
Before installing a new Shimano CN-6701 [paid link] chain, ensure it’s cut to the correct length. Using an incorrect length can result in shifting problems and increased drivetrain wear.
- Method 1: Largest Cog + Largest Chainring (No Rear Derailleur Tension Method)
- Shift to the largest chainring and largest rear cog.
- Wrap the new chain around both but do not pass through the derailleur.
- Add two additional links to this length and cut the chain.
- Method 2: Match the Old Chain
- If your previous chain was properly sized, lay it next to the new CN-6701 chain.
- Count the links and ensure the new chain is the same length before cutting.
Step 2: Connecting the Chain (Pin vs. Quick-Link)
The Shimano CN-6701 chain can be connected using a Shimano connecting pin or a 10-speed quick-link.
- Shimano Connecting Pin Method
- Insert the special Shimano 10-speed connecting pin into the chain link.
- Use a chain tool to push the pin through until it sits flush.
- Break off the excess pin tip using pliers.
- Quick-Link Method
- Insert each end of the chain into the quick-link.
- Snap the link into place by pedaling forward under slight resistance.
- Confirm the link is fully locked by pulling it apart gently.
Step 3: Proper Chain Tension & Drivetrain Adjustment
Once the CN-6701 chain is installed, check derailleur tension and shifting alignment to avoid premature wear or shifting issues.
- Rear Derailleur Adjustment
- Shift through all gears to check for smoothness.
- If the chain struggles to shift, adjust the barrel adjuster in small increments.
- Front Derailleur Alignment
- Ensure the chain moves smoothly between chainrings without rubbing.
- Adjust the front derailleur limit screws if needed.
Shimano CN-6701 Chain Maintenance Guide
Cleaning & Lubrication Routine
Regular cleaning prevents contaminants from wearing down the chain prematurely.
- Every 100-150 miles: Wipe down the chain with a dry cloth.
- Every 300-400 miles: Perform a full degrease and re-lube.
- After wet rides: Dry the chain and apply fresh lube.
Best Lubrication Practices
- Wet lube [paid link]: Best for rainy conditions but attracts dirt.
- Dry lube [paid link]: Ideal for dry weather but requires more frequent reapplication.
Checking for Chain Wear & When to Replace
A worn-out chain reduces shifting accuracy and damages other drivetrain components.
- Use a chain wear checker:
- If the tool drops in at 0.5% wear, replace soon.
- If at 0.75% wear, replace immediately.
Common Shimano CN-6701 Chain Issues & Troubleshooting
1. Noisy Shifting or Skipping Gears
- Possible causes: Chain wear, improper tension, or misaligned derailleur.
- Solution: Check chain length, re-lubricate, and fine-tune derailleur adjustments.
2. Chain Drops When Shifting
- Possible causes: Incorrect front derailleur limit screws or worn chainrings.
- Solution: Adjust limit screws and inspect chainring wear.
3. Chain Sucks or Sticks to Chainrings
- Possible causes: Excessive grime, lack of lubrication, or worn cassette.
- Solution: Clean the chain, reapply lube, and check for cassette wear.