How to Replace Rear Derailleur

Replacing your rear derailleur is a relatively simple process that can be completed in about an hour. The first thing you’ll need to do is remove the old derailleur by removing the two bolts that hold it in place. Once the old derailleur is removed, you’ll need to take off the chain from the bike.

To do this, simply shift the bike into its highest gear and then use a chain tool to remove one of the pins from the chain. With the chain removed, you can now install the new derailleur. Start by attaching it to the frame using the two bolts and then threading the chain through it.

Finally, use the chain tool to reattach one of the pins to secure the chain.

  • Park your bike in a comfortable and safe location where you can work on it without interruption
  • Remove the rear wheel from the bike frame
  • You will need to disconnect the chain first before you can remove the wheel
  • Inspect the derailleur for any damage or wear and tear
  • If it is damaged, you will need to replace it with a new one
  • Disconnect the old derailleur from the frame by removing the bolts that hold it in place
  • Connect the new derailleur to the frame and secure it with bolts
  • Make sure that it is properly aligned before tightening the bolts completely
  • Reconnect the chain to the derailleur and reattach the rear wheel to the frame

How to Replace Rear Derailleur

How to Remove Rear Derailleur

If you’re a cyclist, sooner or later you’ll need to remove your rear derailleur. This is a relatively simple process that can be done at home with just a few tools. Here’s how to do it:

1. First, shift your bike into the smallest gear on the cassette. This will make removing the derailleur easier. 2. Next, locate the rear derailleur hanger bolt and unscrew it with a wrench or Allen key.

3. Now you can pull the rear derailleur off of the hanger. Be careful not to damage the cables as you do this. 4. Once the derailleur is off, you can clean it and inspect it for any damage.

If everything looks good, you can re-install it by following these same steps in reverse order.

Is It Easy to Replace a Rear Derailleur?

No, it is not easy to replace a rear derailleur. Depending on the make and model of your bike, you may need specialized tools to remove and install the new derailleur. You will also need to adjust the derailleur once it is installed, which can be tricky.

How Much Does It Cost to Replace a Rear Derailleur?

A rear derailleur is a device that helps to change gears on a bicycle. It is located at the back of the bike and consists of a series of cogs, or sprockets, that are connected to each other by a chain. The rear derailleur helps to move the chain from one cog to another, which in turn changes the gear ratio and makes pedaling easier or harder.

The cost of replacing a rear derailleur can vary depending on the type of bike you have and the quality of the replacement part. Generally speaking, however, you can expect to pay anywhere from $20 to $200 for a new rear derailleur.

Can You Remove Derailleur Without Breaking Chain?

If you need to remove your derailleur for any reason, you can do so without breaking the chain. This is a useful skill to know if, for example, you need to clean or replace your derailleur. To remove the derailleur, first shift your bike into the smallest cog at the back and the largest cog at the front.

This will take some of the tension off of the chain and make it easier to work with. Next, locate the two screws that hold the derailleur in place (one at the top and one at the bottom). Unscrew these two screws until they are loose enough to allow you to remove the derailleur.

With the screws loosened, gently pull on the derailleur until it comes free from its mount. You may need to wiggle it a bit to get it unstuck. Once it is free, you can set it aside and proceed with whatever maintenance you needed to do.

When you are ready to put the derailleur back on, simply reverse these steps. Start by aligning the derailleur with its mount and then screwing in both of the retaining screws until they are tight. Again, be careful not to move the derailleurs out of position when doing this – if you do, just realign it before tightening the screws all the way down.

After the retaining screws have been tightened down securely, give your chain a quick test by pedaling forward to see if you’ve done everything right – if everything looks and feels normal(i.e., no chain rubbing),then you should be good to go!

Can Rear Derailleurs Swap?

Rear derailleurs come in different sizes and shapes, but they all serve the same purpose: to move the chain from one sprocket to another. Because of this, rear derailleurs are not interchangeable between bikes. The size and shape of the derailleur is determined by the frame of the bike, as well as the number of gears in the drivetrain.

How Do I Know If My Rear Derailleur is Worn Out?

If you’re unsure whether or not your rear derailleur is worn out, there are a few things you can check for. First, inspect the pulleys for wear. If they’re excessively worn, it’s likely time to replace your derailleur.

Next, check the cage for any bent or broken parts. Finally, take a close look at the chain and see if it’s excessively stretched or damaged. If any of these things are present, it’s probably time for a new rear derailleur.

How To Replace Your Rear Derailleur | GCN Tech Monday Maintenance


If your bike’s rear derailleur is damaged or not working properly, you’ll need to replace it. This process is actually quite simple, and can be done at home with a few tools. First, remove the old derailleur by unscrewing the bolts that hold it in place.

Next, take off the chain from the bike. Once the chain is off, you can install the new derailleur. Be sure to line up the screws so that they’re in the same position as on the old one.

Then, just screw in the new derailleur and reattach the chain. You’re now ready to hit the road!