Have you ever found yourself struggling to install a Shimano SIS rear derailleur? If so, you’re in the right place! In this blog article, we will guide you through the step-by-step process of installing a Shimano SIS rear derailleur, making it easier for you to get your bike up and running smoothly.
Installing a rear derailleur may seem like a daunting task, especially if you’re new to bike maintenance. However, with the right instructions and a bit of patience, it can be a straightforward process. So, if you’re ready to learn how to install a Shimano SIS rear derailleur like a pro, let’s dive right in!
Easy Guide: Install Shimano Sis Rear Derailleur
Installing a Shimano SIS rear derailleur may seem like a complex task at first, but with the right instructions and a bit of patience, it can be accomplished by anyone with basic mechanical skills.
Gather the tools and supplies
Before you begin, make sure you have the following tools and supplies ready:
- Shimano SIS rear derailleur
- Allen wrench set or a multi-tool with Allen wrenches
- Philips head screwdriver
- Bike stand or a secure way to elevate your bike
- Clean cloth or towel
- Chain lubricant
- Cable cutter or sharp pliers
- Replacement gear cables (if needed)
- Replacement cable housing (if needed)
Prepare your bike
1. Start by elevating your bike using a bike stand or any other secure method. This will make it easier to access and work on the rear derailleur.
2. Shift the chain onto the smallest chainring and the smallest rear cog. This relieves tension on the derailleur, making it easier to remove and install.
Remove the old derailleur
1. Identify the rear derailleur on your bike. It is usually located at the rear dropout, just above the rear cassette.
2. Using an Allen wrench or a multi-tool, remove the bolt or bolts securing the derailleur to the derailleur hanger. Set the bolts aside in a safe place.
3. Gently slide the derailleur out of the derailleur hanger and set it aside. Take note of how the derailleur was positioned before removal, as this will help with the installation of the new derailleur.
4. Inspect the derailleur hanger for any damage or alignment issues. If necessary, consult a bike mechanic or use a derailleur hanger alignment tool to ensure proper alignment.
Install the new derailleur
1. Begin by aligning the new Shimano SIS rear derailleur with the derailleur hanger. Make sure the derailleur is positioned correctly, matching the previous orientation if possible.
2. Insert the derailleur bolt(s) through the derailleur and into the derailleur hanger. Tighten the bolt(s) securely using an Allen wrench or a multi-tool.
Adjust the derailleur position
1. With the new derailleur installed, it’s important to fine-tune its position for optimal shifting performance.
2. Shift the chain onto the largest chainring and the smallest rear cog. This will create tension on the derailleur, allowing you to make the necessary adjustments.
3. Locate the high limit screw on the derailleur. It is often labeled “H” and is used to limit the movement of the derailleur towards the wheel. Turn the screw clockwise to move the derailleur away from the wheel, ensuring it doesn’t contact the cassette.
4. Shift the chain onto the smallest chainring and the largest rear cog. Now, locate the low limit screw on the derailleur, often labeled “L”. Turn the screw clockwise to move the derailleur towards the wheel, ensuring the jockey pulley aligns perfectly with the largest rear cog.
5. Once both the high and low limit screws are adjusted, shift through the gears to test the shifting performance. Ensure the chain smoothly moves from one gear to another without hesitation or excessive noise.
Install new gear cables and housing (if needed)
1. If your derailleur’s shifting performance is still not optimal, it might be time to replace the gear cables and housing.
2. Start by removing the old cables and housing. If you’re unfamiliar with this process, it’s a good idea to consult a bike mechanic or refer to your bike’s user manual.
3. Cut the new gear cables to the appropriate length, leaving a bit of extra length for adjustments. Install them by threading them through the shifters, cable housing, and derailleur.
4. Secure the cables using the appropriate cable housing ferrules or end caps, making sure they are seated properly to prevent any future issues.
Final adjustments and maintenance
1. Once the new cables and housing are installed, make any necessary adjustments to ensure smooth shifting. Use barrel adjusters on the shifters or the derailleur to fine-tune the cable tension.
2. Apply some chain lubricant to your chain to keep it running smoothly. Wipe off any excess lubricant to prevent attracting dirt and grime.
3. Take your bike for a short test ride, shifting through all gears and paying attention to how the rear derailleur performs. If you notice any issues, revisit the cable tension adjustments or consider seeking professional help.
Installing a Shimano SIS rear derailleur requires attention to detail, but once you’ve done it successfully, you’ll have a smooth-shifting bike ready for your next adventure. With the right tools, a bit of patience, and these step-by-step instructions, you can confidently install a new rear derailleur and enjoy optimal performance on your bike.
Frequently Asked Questions
1. How do I attach a Shimano SIS rear derailleur to my bike?
To attach a Shimano SIS rear derailleur, start by positioning it over the derailleur hanger. Align the bolt holes and insert the mounting bolt. Tighten the bolt securely using a wrench.
2. What is the correct positioning for the Shimano SIS rear derailleur?
Position the Shimano SIS rear derailleur so that the jockey wheel aligns directly under the smallest rear cog. Make necessary adjustments to ensure proper alignment and tension of the derailleur.
3. How do I adjust the cable tension for the Shimano SIS rear derailleur?
Begin by shifting the chain to the smallest front chainring and rear cog. Loosen the cable anchor bolt and pull the cable taut. Retighten the anchor bolt and use the barrel adjuster to fine-tune the tension for smooth shifting.
4. How do I set the limits on the Shimano SIS rear derailleur?
To set the limits, shift the chain to the smallest and largest rear cogs. Use the high and low limit screws to align the derailleur vertically with each cog, ensuring precise shifting without overshifts or chain rub.
5. How can I fine-tune the shifting performance of my Shimano SIS rear derailleur?
If shifting isn’t smooth, use the barrel adjuster to make minor adjustments to the cable tension. Check for proper alignment and tension of the derailleur hanger, as well as wear on the chain and cogs, which could affect shifting performance.
Final Thoughts
In conclusion, installing a Shimano SIS rear derailleur is a straightforward process that can greatly improve your cycling experience. By following the step-by-step guide outlined in this article, you can easily install the derailleur and ensure smooth shifting on your bike. Remember to carefully read the instructions provided by Shimano and gather all the necessary tools before beginning the installation.
To install the Shimano SIS rear derailleur, start by removing the old derailleur and attaching the new one using the appropriate bolts. Then, adjust the high and low limit screws to ensure the smooth movement of the chain across the cassette. Finally, fine-tune the indexing by aligning the guide pulley with each gear on the cassette.
By following these installation steps, you can confidently install the Shimano SIS rear derailleur on your bike, enhancing your cycling performance. Remember to take your time and double-check each step to ensure proper installation. Enjoy your newly installed derailleur and experience improved shifting on your rides.
