Avoid These Costly Shimano FC-6700 Chainring Mistakes That Can Wreck Your Drivetrain

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The Shimano FC-6700 [paid link] chainring, part of the 105 series, is designed to provide cyclists with reliable, smooth, and efficient performance. However, improper installation, maintenance, or adjustments can cause significant damage to your drivetrain, leading to costly repairs and suboptimal performance. In this guide, we will highlight the most common mistakes when working with the Shimano FC-6700 [paid link] chainring and provide expert advice on how to avoid them.

1. Improper Installation of the Chainring

One of the most critical steps in ensuring the longevity and optimal performance of your Shimano FC-6700 [paid link] chainring is correct installation. Unfortunately, many cyclists overlook the fine details, leading to major drivetrain issues down the line.

Common Mistakes:

  • Misaligning the Chainring: The chainring should be perfectly aligned with the crankset. Misalignment can cause inconsistent chain engagement, poor shifting performance, and excessive wear on the chainring and chain.
  • Not Torquing the Bolts Properly: Over-tightening or under-tightening the chainring bolts can lead to shifting issues or, worse, cracked bolts or chainring damage.
  • Using Incorrect Bolts: Ensure you’re using the correct bolts for the FC-6700 model. Mismatched bolts can cause improper attachment and lead to instability during rides.

How to Avoid These Mistakes:

  • Always align the chainring properly with the crankset and ensure that it sits flush. You can use a straight edge or a tool designed for alignment if you’re unsure.
  • Use a torque wrench [paid link] to tighten the bolts to Shimano’s recommended specifications (typically 5-7Nm).
  • Double-check that you’re using the correct chainring bolts specified for the FC-6700.

2. Neglecting Proper Lubrication

Lubrication is vital to prevent premature wear and reduce friction between the chainring, chain, and other drivetrain components. Neglecting this task can accelerate wear on your Shimano FC-6700 chainring and lead to costly replacements.

Common Mistakes:

  • Using the Wrong Lubricant: Some cyclists use household oils or greases, which are not suitable for bike components. These can attract dirt and debris, accelerating wear and clogging up the drivetrain.
  • Forgetting to Lubricate the Bolts: Failing to lubricate the chainring bolts can cause them to seize, making future removal difficult or damaging the crankset threads.

How to Avoid These Mistakes:

  • Always use a bike-specific lubricant, such as a high-quality chain lube or grease designed for use with drivetrains.
  • Apply a thin layer of lubricant to the chainring bolts to ensure smooth installation and removal, preventing seizing or corrosion.

3. Ignoring Chain Compatibility

The Shimano FC-6700 chainring is designed to work with a specific range of chains, and using incompatible chains can significantly reduce performance and increase wear.

Common Mistakes:

  • Using an Old or Worn Chain: A worn-out chain will not mesh properly with the FC-6700 chainring, resulting in poor shifting performance and excessive wear on both the chain and chainring.
  • Choosing the Wrong Chain for the Drivetrain: The FC-6700 chainring is compatible with 10-speed drivetrains. Using an 11-speed chain, for instance, may cause compatibility issues and suboptimal performance.

How to Avoid These Mistakes:

  • Ensure your chain is compatible with the FC-6700 chainring and the 10-speed drivetrain. Regularly inspect the chain for signs of wear and replace it when necessary.
  • Use a chain checker tool to assess wear and replace chains at the first sign of elongation.

4. Failure to Inspect and Maintain Regularly

Chainrings, including the Shimano FC-6700, undergo significant stress during each ride. Regular inspection and maintenance are crucial to catch any potential issues before they cause serious damage to the drivetrain.

Common Mistakes:

  • Skipping Regular Inspections: Not inspecting the chainring for wear, cracks, or damage can result in sudden failures during rides.
  • Overlooking the Condition of the Chainring Teeth: Worn-out teeth can cause poor shifting performance and chain slippage, which may eventually lead to a damaged chain or derailleur.

How to Avoid These Mistakes:

  • Periodically inspect your chainring for visible signs of damage, such as cracks or severe wear on the teeth.
  • Pay close attention to the condition of the teeth. If they are worn down, replace the chainring before it causes further drivetrain damage.

5. Using Incorrect Chainring Sizes

Choosing the wrong chainring size can affect the performance of your bike and the longevity of your drivetrain. The Shimano FC-6700 chainring comes in various sizes, and using an incorrect size can result in uncomfortable gearing ratios and increased wear.

Common Mistakes:

  • Incorrect Gear Ratios: A chainring that is too large or small for your riding style or terrain can lead to inefficient pedaling and unnecessary strain on your drivetrain.
  • Compatibility Issues with Other Components: If your FC-6700 chainring is not compatible with your current cassette or rear derailleur, shifting performance can suffer.

How to Avoid These Mistakes:

  • Choose a chainring size that suits your riding style, fitness level [paid link], and the terrain you’ll be riding on. Consult with a bike shop or use online gear calculators to determine the best gearing setup.
  • Ensure that the selected chainring size is compatible with your rear cassette and derailleur.

6. Improper Chainring Maintenance Schedule

Like all components on your bike, the Shimano FC-6700 chainring requires regular maintenance to keep it performing at its best. Ignoring a maintenance schedule can lead to a buildup of dirt, grime, and rust, which accelerates wear and reduces performance.

Common Mistakes:

  • Neglecting Cleaning and Degreasing: Dirt and grease buildup on the chainring can cause shifting issues and accelerate wear on the teeth.
  • Forgetting to Check for Damage After Riding in Harsh Conditions: After riding in wet or muddy conditions, it’s easy to forget to clean the chainring, leading to rust or corrosion.

How to Avoid These Mistakes:

  • Clean the chainring regularly with a degreaser designed for bike components, particularly after riding in wet or muddy conditions.
  • Inspect the chainring for damage after each ride, especially if you’ve been riding in harsh conditions.

Conclusion

Taking care of your Shimano FC-6700 chainring is essential to maintain the performance and longevity of your drivetrain. By avoiding these common mistakes, you can ensure smoother shifts, better efficiency, and a longer lifespan for your chainring. Proper installation, maintenance, and regular inspections will help you maximize the performance of your bike and avoid costly repairs down the road.