The Disc bolt patterns are different, (not that it would make much difference to how the disc is held onto the hub), your RMZ will have four bolts on the front disc and an RM will have 6. Pretty sure the RMZ axle diameters and hub widths will be different also.
The front uses different axle diameter. I've run a rm smoker wheel on the rmz with a shim for the axle clamp
Post a reply to: Rm and rmz wheel compatibility