SRAM XD driver replacement or Shimano driver replacement.
If you are unsure of the Generation for the driver you need, please see the list below for the specific generation dates on Borealis Fat Bikes.
2nd Gen – Late 2014 to mid 2016
3rd Gen – Mid 2016 to 2018
4th Gen - Fall 2018 to present
Note: Driver and pawls only, endcaps must be purchased separately.