Pedaling noise can be a frustrating issue for cyclists, especially when it comes to road bikes equipped with high-performance components like the Shimano FC-6700 [paid link] chainring. Understanding and diagnosing the cause of noise during pedaling is crucial not only for a smoother ride but also for maintaining the longevity and efficiency of your drivetrain. In this guide, we will delve into the common reasons behind noisy pedaling with the Shimano FC-6700 [paid link] chainring and provide step-by-step instructions on how to fix them.

Common Causes of Noisy Pedaling with the Shimano FC-6700 Chainring

Before jumping into solutions, it’s essential to identify the root cause of the noise. Shimano FC-6700 [paid link] chainrings are designed for smooth, quiet operation, but several factors can contribute to unwanted sounds during pedaling.

1. Chainring Wear and Tear

One of the most common causes of noisy pedaling is wear and tear on the chainring itself. Over time, the teeth on the chainring can become worn, which leads to poor engagement with the chain. This poor engagement often results in noise as the chain skips or fails to mesh smoothly with the teeth.

2. Incorrect Chainring Installation

If the Shimano FC-6700 chainring has been installed incorrectly, it can cause improper alignment with the chain. This misalignment can lead to rubbing, skipping, or even chain drop during pedaling, all of which can create distracting noises.

3. Chain Issues

A stretched or damaged chain is another common culprit behind noisy pedaling. If the chain is worn or not properly lubricated, it may struggle to mesh smoothly with the teeth of the chainring, leading to noise. A chain that is too long or short can also result in poor shifting and excessive noise.

4. Crankset Misalignment

When the crankset is not properly aligned or tightened, the chainring can become slightly off-center, causing the chain to rub or slip during pedaling. This misalignment can be particularly noticeable when pedaling under load or while shifting.

5. Inadequate Lubrication

If the chainring, chain, or bottom bracket lacks proper lubrication, friction can increase, leading to noise. Lubricating the moving parts of your drivetrain is essential to reduce friction and ensure smooth operation.

Step-by-Step Guide to Fix Noisy Pedaling

Once you’ve identified the possible causes of the noisy pedaling, follow these steps to diagnose and fix the issue.

Step 1: Inspect the Chainring for Wear

How to Check Chainring Wear:

• Visual Inspection: Check for any noticeable wear on the teeth of the Shimano FC-6700 chainring. If the teeth are visibly worn down, chipped, or misshapen, it might be time to replace the chainring.
• Chainring Wear Indicator: Use a chain wear indicator tool to check the engagement points on the chainring. If the teeth appear to be excessively worn and the chain doesn’t engage properly, replacing the chainring may be necessary.

Step 2: Verify Chainring Installation

How to Ensure Correct Installation:

• Check Chainring Bolts: Ensure all bolts holding the Shimano FC-6700 chainring are correctly tightened to the manufacturer’s specifications. If the bolts are loose, the chainring may move slightly during pedaling, causing noise.
• Correct Positioning: Ensure that the chainring is properly aligned with the crankset. It should sit evenly and flush with the crank arm. If it’s misaligned, it may cause friction with the chain.

Step 3: Inspect and Replace the Chain

How to Check for Chain Issues:

• Chain Wear Check: Use a chain checker tool to measure chain stretch. If the chain is significantly worn, it may not mesh correctly with the teeth of the Shimano FC-6700 chainring. Replacing a worn chain can often resolve noise issues.
• Chain Lubrication: Ensure your chain is properly lubricated with a high-quality chain lube. Dry or dirty chains are prone to friction and can produce noise. Apply lubricant evenly to the chain and wipe away any excess.
• Chain Length: If your chain is too long or too short, it may cause issues with shifting and pedaling. Ensure the chain is the correct length for your drivetrain setup.

Step 4: Examine the Crankset and Bottom Bracket

How to Inspect the Crankset and Bottom Bracket:

• Crank Arm Tightness: Check the crank arms to ensure they are properly tightened to the spindle. Loose crank arms can cause the chainring to wobble, leading to noise.
• Bottom Bracket Health: If the bottom bracket bearings are worn, it can cause the crankset to rotate unevenly, which can lead to pedal noise. Inspect the bottom bracket for any play or roughness during rotation and replace it if necessary.

Step 5: Lubricate Moving Parts

Proper lubrication is essential for smooth, quiet operation. Follow these steps to lubricate key components:

• Lubricate the Chain: Apply chain lube to the inner and outer surfaces of the chain, focusing on the links that make contact with the chainring. Avoid over-lubricating, as excess lubricant can attract dirt and cause build-up.
• Lubricate the Chainring Bolts: Apply a small amount of grease to the chainring bolts to prevent them from seizing or loosening over time.

Step 6: Perform a Test Ride

After completing the inspection and making necessary adjustments, perform a test ride to check for noise. Pay attention to the chainring area to ensure that the pedaling is smooth and quiet. Shift through the gears to confirm that the chain is engaging properly and that no noise occurs during high-load pedaling.

Conclusion

Noisy pedaling on your Shimano FC-6700 chainring can be an annoying issue, but with careful inspection and maintenance, most problems can be diagnosed and fixed. Start by inspecting the chainring for wear and checking the installation, then move on to the chain, crankset, and bottom bracket. Proper lubrication and correct chain length are also crucial to keeping your drivetrain running smoothly. By following these steps, you can restore quiet, efficient pedaling and ensure that your Shimano FC-6700 chainring performs at its best for years to come.