On most derailleurs, your “B-Gap” adjustment is critical. With 12-speed drivetrains like
SRAM’s Eagle system, it’s even more important…Enough so that SRAM makes a tool to set the proper adjustment. We found an easy and simple way to create an indicator on your derailleur so you won’t need to use the tool moving forward.
Link to SRAM’s how to video on adjusting your B-Gap properly using their tool:
https://www.youtube.com/watch?v=YjgBt…
