When your Shimano FC-6700 [paid link] chainring starts feeling off, it can have a significant impact on your overall riding experience. Issues such as poor shifting, irregular pedal feel, or inconsistent power transfer are often linked to performance problems with the chainring. Understanding the root causes of these issues and how to address them can help you restore smooth and reliable performance to your drivetrain.
Identifying Common Performance Issues with the FC-6700 Chainring
Before diving into the fixes, it’s important to understand the common performance problems that riders experience with the Shimano FC-6700 [paid link] chainring. These issues can stem from wear and tear, improper installation, or poor maintenance practices. Here’s a look at some of the most common performance problems:
1. Poor Shifting Performance
One of the most noticeable symptoms of a performance issue with your FC-6700 [paid link] chainring is poor shifting performance. This can manifest as sluggish or inaccurate shifts, especially under load. You may experience delays when shifting between gears, or your chain may even skip or drop entirely.
2. Noisy Pedaling
Another common problem is noisy pedaling, which can be a sign of chainring misalignment, wear, or dirt buildup. If your chainring teeth are worn down, they may fail to engage the chain properly, leading to clicking or grinding noises during pedaling.
3. Pedal Feel and Power Transfer Issues
When the chainring is not functioning optimally, you may feel uneven or inconsistent resistance when pedaling. This can feel like a “dead spot” or hesitation as you transfer power from your legs to the drivetrain. A poorly aligned or worn chainring can lead to inefficient power transfer, reducing your overall efficiency and ride quality.
Why These Problems Occur
The reasons behind these performance issues are often linked to either the chainring itself or other components in the drivetrain system. Understanding the root causes is essential for troubleshooting and fixing the problem effectively.
1. Chainring Wear
Over time, the teeth on your Shimano FC-6700 chainring will wear down, especially if you frequently ride in wet, muddy, or gritty conditions. Chainring wear causes irregular tooth profiles, which leads to poor chain engagement and can result in slipping or rough shifting. Worn chainrings can also cause noise and poor pedal feel.
2. Misalignment
Chainring misalignment can occur during installation or as a result of a crash. If the chainring is slightly bent or not seated properly on the crankset, it can affect shifting performance and lead to uneven power transfer. Misalignment can also cause the chain to derail or slip, creating a hazardous situation while riding.
3. Chain and Chainring Compatibility
Another potential issue lies in the compatibility between the chain and the FC-6700 chainring. If your chain is too old or worn, it may not mesh properly with the teeth of the chainring, causing poor performance. Additionally, a mismatched chainring size or type can create shifting issues and affect pedal feel.
4. Dirt and Debris Buildup
Dirt, debris, and chain lubricant buildup can also compromise chainring performance. When debris accumulates on the teeth or in the gaps between the chainring and crankset, it can create friction, preventing the chain from smoothly engaging the teeth. This can lead to poor shifting, noisy pedaling, and an overall unpleasant ride.
How to Fix These Performance Issues
Now that we’ve identified the causes of the most common performance problems with the Shimano FC-6700 chainring, let’s look at how to fix them and get your bike back to optimal performance.
1. Inspect and Replace Worn Chainring Teeth
The first step in addressing poor shifting and noisy pedaling is to inspect the chainring teeth for wear. Use a magnifying glass or feeler gauges to check for any signs of significant wear or damage. If the teeth are worn down, it’s time to replace the chainring.
To replace the chainring:
- Remove the crankset from the bike.
- Use a chainring tool to remove the bolts securing the chainring to the crankset.
- Install the new FC-6700 chainring and tighten the bolts to the manufacturer’s recommended torque setting.
- Reinstall the crankset and make any necessary adjustments to the front derailleur.
2. Check for Chainring Misalignment
To check for misalignment, visually inspect the chainring while pedaling. Look for any wobbling or noticeable gaps between the chainring and crankset. You can also use a crank arm alignment tool to ensure that the chainring is properly aligned. If you find any misalignment, you’ll need to adjust the position or replace the crankset if it’s bent.
3. Replace the Chain if Necessary
If your chain is worn or stretched, it may not mesh well with the teeth on the FC-6700 chainring. A worn chain can lead to poor shifting, noisy pedaling, and inconsistent power transfer. To check the chain for wear, use a chain checker tool to measure its elongation.
If the chain is worn beyond the recommended limit, replace it with a compatible chain. When replacing the chain, it’s often a good idea to replace the chainring as well to ensure compatibility.
4. Clean and Lubricate the Chainring
Regular cleaning and lubrication can prevent debris buildup and ensure smooth operation. To clean the FC-6700 chainring:
- Remove any dirt or debris from the chainring teeth using a stiff brush or chainring tool.
- Use a degreaser to clean any buildup of chain lube or grime from the teeth.
- After cleaning, apply a small amount of lubricant to the chainring teeth to reduce friction and improve shifting.
5. Verify Chainring and Drivetrain Compatibility
If you are using a non-original or mismatched chainring with your FC-6700 crankset, it’s crucial to ensure that the components are compatible. Shimano provides clear compatibility guidelines for their chainrings, so make sure the chainring is designed to work with your specific model.
Preventing Future Performance Issues
Once you’ve resolved the immediate performance issues, it’s important to implement regular maintenance practices to avoid future problems. Here are a few tips to keep your FC-6700 chainring in top condition:
- Regular Cleaning: Clean your chainring regularly to prevent dirt and debris buildup.
- Periodic Inspections: Inspect the chainring for signs of wear every few months, especially if you ride in harsh conditions.
- Lubrication: Keep the chain and chainring properly lubricated to reduce friction and improve shifting performance.
- Replace Worn Components: Replace the chainring and chain when they show signs of excessive wear.
By staying on top of your maintenance routine, you can keep your Shimano FC-6700 chainring running smoothly for years to come.