If you’re an avid cyclist, chances are you’ve had to deal with a bent derailleur. Derailleurs are the mechanisms responsible for shifting the gears on a bike, and a bent derailleur can cause issues like difficulty shifting, or an inability to shift at all. This can be a major problem, as a bent derailleur can reduce the efficiency of your ride. Fortunately, there are some simple steps you can take to fix a bent derailleur. Here’s how you can do it.
What Causes a Bent Derailleur?
A bent derailleur can be caused by a variety of different factors. The most common culprits are impact damage, such as hitting a rock or curb while riding, or a collision with another bike or vehicle. Other causes can include a poor installation, an incorrect adjustment of the cable tension, or a worn out clutch or pulley wheel.
How Can You Tell if Your Derailleur is Bent?
If your derailleur is bent, you’ll likely notice some issues with how it functions. You may find that it’s difficult or impossible to shift, or that your chain is skipping gears. You may also hear a grinding or clicking noise when you’re pedaling. If you notice any of these symptoms, it’s likely that your derailleur is bent.
Tools You'll Need to Fix a Bent Derailleur
Before you can fix your bent derailleur, you’ll need to have the right tools. You’ll need a set of Allen wrenches, a Phillips screwdriver, and pliers. You may also want to have a hammer and a pair of needlenose pliers on hand. It’s also a good idea to have a few spare parts on hand, just in case you need to replace something.
Steps to Fix a Bent Derailleur
Once you’ve gathered the tools and supplies you need, it’s time to start the repair process. Here are the steps to follow:
Step 1: Remove the Derailleur
The first step is to remove the derailleur from the bike. Start by removing the chain from the rear cog, then unscrew the mounting bolt from the derailleur. You may need to use a wrench or screwdriver to do this. Once the derailleur is free, you can remove it from the bike.
Step 2: Inspect the Derailleur
Now that the derailleur is removed, you’ll need to inspect it for damage. Look for any bent or broken parts, or any other signs of wear and tear. If you find any damage, you’ll need to replace the part before proceeding. If the derailleur looks okay, you can proceed to the next step.
Step 3: Straighten the Derailleur
At this point, you’ll need to straighten the derailleur if it’s bent. You can do this by carefully bending it back into shape with your hands, or by using a hammer and a pair of needlenose pliers. Be sure to take your time, and don’t force the derailleur too much, as this could cause further damage.
Step 4: Reinstall the Derailleur
Now that you’ve straightened the derailleur, it’s time to reinstall it on the bike. Start by mounting the derailleur onto the frame using the mounting bolt. Then, thread the chain through the pulleys and back onto the cog. Make sure you’ve threaded the chain correctly before tightening the mounting bolt.
Step 5: Adjust the Cable Tension
The final step is to adjust the cable tension. This will help ensure that the derailleur shifts properly. Start by loosening the cable stop bolt. Then, turn the barrel adjuster clockwise until the chain shifts smoothly and without hesitation. Once the chain is shifting properly, you can tighten the cable stop bolt.
Frequently Asked Questions
Q: What causes a bent derailleur?
A: A bent derailleur can be caused by impact damage, such as hitting a rock or curb while riding, or a collision with another bike or vehicle. Other possible causes can include a poor installation, an incorrect adjustment of the cable tension, or a worn out clutch or pulley wheel.
Q: How can I tell if my derailleur is bent?
A: If your derailleur is bent, you’ll likely notice some issues with how it functions. You may find that it’s difficult or impossible to shift, or that your chain is skipping gears. You may also hear a grinding or clicking noise when you’re pedaling. If you notice any of these symptoms, it’s likely that your derailleur is bent.
Q: What tools do I need to fix a bent derailleur?
A: To fix a bent derailleur, you’ll need to have a set of Allen wrenches, a Phillips screwdriver, and pliers. You may also want to have a hammer and a pair of needlenose pliers on hand. It’s also a good idea to have a few spare parts on hand, just in case you need to replace something.
Q: What are the steps to fix a bent derailleur?
A: The steps to fix a bent derailleur are as follows: 1) remove the derailleur from the bike; 2) inspect the derailleur for damage; 3) straighten the derailleur if it’s bent; 4) reinstall the derailleur on the bike; and 5) adjust the cable tension.
Q: What can happen if I don't fix a bent derailleur?
A: If you don’t fix a bent derailleur, you may find that it’s difficult or impossible to shift, or that your chain is skipping gears. You may also hear a grinding or clicking noise when you’re pedaling. This can be a major problem, as a bent derailleur can reduce the efficiency of your ride.
Q: Can I fix a bent derailleur myself?
A: Yes, you can fix a bent derailleur yourself. You’ll need to have the right tools, such as a set of Allen wrenches, a Phillips screwdriver, and pliers. You may also want to have a hammer and a pair of needlenose pliers on hand. Once you have the tools, you can follow the steps outlined above to fix the derailleur.