SRAM X-SYNC 2 12 Speed Chainring - 34T - 104mm BCDSRAM X SYNC 2 12 Speed Chainring Four bolt SRAM X Sync 2 12 Speed Aluminium Chainring with a 104 BCD, essential for keeping your drivetrain running smoothly and ensuring chain retention. X SYNC 2 is a completely new design, which results from the research findings of SRAM engineers after the wear behavior and performance of thousands of X SYNC chainrings were studied. The focus is on durability. Thus, the new tooth profile reduces friction in the