Replacing your Shimano FC-6700 [paid link] chainring is an essential part of bike maintenance that can dramatically enhance your bike’s performance and overall drivetrain efficiency. Over time, chainrings wear down due to regular use, causing poor shifting, inefficient pedaling, and uneven chain wear. Replacing a worn chainring can restore smooth shifting and optimize pedaling efficiency. In this guide, we will walk you through the necessary steps to replace your Shimano FC-6700 [paid link] chainring, ensuring you maximize its potential and maintain a high-performing drivetrain.
Tools Required
Before you begin, make sure you have the following tools:
- Shimano chainring bolts tool
- Torque wrench [paid link]
- 5mm Allen key
- 8mm Allen key (if needed)
- Chainring removal tool
- Bike stand [paid link] (optional but helpful)
- Rags for cleaning
- Chain whip (if you need to remove the cassette)
Step 1: Prepare Your Bike
To start, position your bike in a stable work area. A bike stand [paid link] is ideal, but if you don’t have one, you can flip your bike upside down or secure it against a sturdy surface. Shift your bike into the smallest cog on the cassette to relieve tension on the chain. This will make removing the chain and chainring easier.
If necessary, remove the rear wheel to give yourself more space to work. You may also want to clean the area around the chainring before proceeding.
Step 2: Remove the Chain
To remove the chain, you’ll need to either break it using a chain tool or remove it entirely if it has a quick link. It is recommended to use a quick link remover tool if your chain has this feature. Once the chain is removed, set it aside safely, ensuring it doesn’t get tangled.
Step 3: Remove the Crankset
Next, you’ll need to remove the crankset to access the chainring. Start by loosening the bolts holding the crank arm to the bottom bracket. This step will require a 5mm Allen key, but make sure to check whether your crankset uses a different bolt size (some require an 8mm Allen key). Once the bolts are loose, remove the crankset from the bike.
Step 4: Remove the Old Chainring
Now that the crankset is off, you can access the chainring. The Shimano FC-6700 [paid link] uses a 4-bolt pattern to attach the chainring to the crankset. Use the Shimano chainring bolts tool to carefully remove the chainring bolts.
After removing the bolts, take off the old chainring and set it aside. It’s essential to inspect the crankset for any wear, dirt, or damage at this stage.
Step 5: Install the New Shimano FC-6700 Chainring
Take your new Shimano FC-6700 chainring and align it with the crankset. Ensure that the bolt holes match up properly. Place the chainring onto the crankset and insert the bolts.
Tighten the bolts using the 5mm Allen key. Ensure that the bolts are evenly tightened in a criss-cross pattern to maintain even pressure. Refer to the manufacturer’s specifications for the recommended torque setting for these bolts, which is typically between 10-12Nm. Use a torque wrench [paid link] to ensure you do not overtighten the bolts, as this could damage the crankset or chainring.
Step 6: Reinstall the Crankset
With the new chainring securely attached, reinstall the crankset back onto the bike. Align the crankset with the bottom bracket and tighten the bolts. Again, use your 5mm Allen key (or 8mm if required) and tighten to the manufacturer’s recommended torque setting, typically around 35-45Nm.
Check that the crank arms are properly aligned, and that there is no excessive play once the bolts are tight.
Step 7: Reinstall the Chain
Reinstall the chain by feeding it through the chainring and the cassette. If you removed the chain entirely, now is the time to reconnect it. Ensure the chain is properly routed through the derailleur and adjust its tension if necessary.
Step 8: Test the Setup
After everything is reinstalled, spin the pedals by hand to check that the new chainring is functioning correctly. Ensure the chain runs smoothly over the chainring and that there is no rubbing or excessive friction. Shift through all gears to test the drivetrain and ensure that shifting is smooth and responsive. If shifting feels sluggish or there is resistance, check the alignment of the chainring and adjust accordingly.
Step 9: Fine-Tuning the Derailleur
If you experience issues with shifting after installing the new chainring, you may need to adjust your front derailleur. Fine-tuning the derailleur ensures it shifts precisely between chainrings. Check the position of the derailleur cage, ensuring it clears the new chainring without making contact. Adjust the limit screws and cable tension as needed to ensure smooth shifting.
Step 10: Final Checks and Maintenance
Once the new Shimano FC-6700 chainring is properly installed and functioning, make sure everything is in order. Check the crankset for any wobble or looseness, and verify that the chain is correctly tensioned. Regularly maintain the chainring by cleaning it after every ride and inspecting it for wear over time. Lubricate the chainring and chain as needed to prevent rust and wear.
Tips for Long-Term Performance
- Regular Inspection: Even with a new chainring, regular inspection is key. Check for any signs of wear or damage every few rides to ensure the chainring remains in top condition.
- Keep Your Chain Clean: A clean chain puts less stress on the chainring, preventing premature wear. Make sure to clean your chain frequently, especially after muddy or wet rides.
- Avoid Cross-Chaining: Cross-chaining, or riding in extreme gear combinations, puts unnecessary stress on both your chainring and chain, accelerating wear.
Replacing your Shimano FC-6700 chainring is a straightforward process, but it requires careful attention to detail. By following the steps outlined in this guide, you’ll ensure that your drivetrain operates smoothly, improving performance and efficiency for every ride.