To properly adjust the Shimano 105 rear derailleur for optimal performance, follow these steps:
- Begin by shifting the chain onto the smallest rear cog and the smallest front chainring.
- Use the barrel adjuster on the derailleur to align the jockey wheel with the smallest cog.
- Check the alignment by shifting through the gears. If the chain hesitates or makes noise, make small adjustments to the barrel adjuster until the shifting is smooth.
- Next, shift the chain onto the largest rear cog and the largest front chainring.
- Adjust the B-tension screw to ensure the jockey wheel is properly aligned with the largest cog.
- Test the shifting again and make any necessary fine-tuning adjustments.
By following these steps, you can ensure that your Shimano 105 rear derailleur is properly adjusted for optimal performance.
