Hope Shimano MicroSpline Aluminium, 12 Speed Freehub, Inc 12mm Spacer
This is a Hope Pro 4 Rear hub Microspline Freehub Bodies - Supplied with Drive Side spacer
This will allow upgrade of a Hope Pro 4 hub to 12 speed Shimano Microspline
Note:If you are running an e-bike its recommended to use a steel instead of aluminium free hub due to the extra torque created by the motor