Sram xx1 eagle rear mech type 30this sram xx1 eagle rear mech benefits from srams redesigned type 30 roller bearing clutch feature which has a smoother curve than the previous model for an even more consistent and quieter running drivetrain and excellent chain retention the xx1 eagle rear mech has been completely redesigned and is equipped with the very best of srams drivetrain features these include the race winning x actuation and x horizon technologies which ensure ghost shifting an