As Breeze3t stated, I believe to be true. However the diameter of the lower legs for the axle is different(larger). There may be your problem. I haven't seen any shim reducer for that, they may exist though. Do you have a set of earlier legs?
tourbox
Have changed front/rear wheels on my '02 FLHT from 16" to 18" and the front wheel on my Deuce from the OEM wheel to a Breakout wheel. The Deuce front is a 3/4" axle and there are no 3/4" bore bearings available that are the same width of the 3/4" bearing; same OD but not width. Looked at several options and final solution was using the 1" bore bearings with axle reducers and trimming the axle spacers to allow for the thickness of the reducer flange.