When I was changing my crankset awhile back and considering whether to cheap-out by keeping my old bottom bracket, I searched all over this place before deciding to get the correct ISO BB to go with my cranks. But something that stuck with me from discussions I found on the subject was that in at least one instance, someone pretty well thought of around here supported interchangeability of ISO/JIS:
Originally Posted by
Scrodzilla
Originally Posted by markaitch
fwiw, if you do decide to go the longer spindle route there are plenty of iso bbs available with them so please resist the calls to go with a jis bb.
As expected, you obviously know much more than Sheldon Brown on the matter of
ISO/JIS interchangeability.
Originally Posted by
Scrodzilla
You must have missed the last sentence:
Originally Posted by Sheldon Brown
I generally avoid mixing sizes on customers' bikes, but I have a lot of experience mixing ISO/J.I.S. in both directions on my own personal bikes, and it as never given me a lick of trouble.