Shimano 12-speed cassette

12-speed, 10-45 or 10-51 - Hyperglide+ technology

10-51 teeth - Micro Spline freewheel body

11-30 and 11-34 223g to 253g

12-speed, 11/30 and 11/34, from 291 to 345g

10-45, 10-51

12-speed drivetrain - 11/34 teeth

9-45 or 10-51 teeth