The original failed intermediate bearings are from Japan. The replacements are from Poland. (same part#) The original output shaft bearings are from England, the replacements are also from Poland. (updated part#) All the bearings new and old measure the exact same thickness with the exception of the failed bearing that is .001" bigger. EDIT-After a more accurate measurement with a dial gauge, The bearings were indeed the same size. The caliper is sensitive to hand pressure and I'm sure that's the .001 difference). If you recall , this is the same bearing that did not want to come out of the housing during disassembly. I believe the 100+ miles the bike was ridden with the failed bearing may have distorted it somehow. The bottom line is all the bearings seem to be made to very tight tolerances. To my thinking, this means I am replacing apples with apples and their should be no reason to re shim the shafts, right?