Joined: Jan 2010
Posts: 9,831
Likes: 1,809
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Roadrunner, I'm sorry, but that chart is complete BS.
I measure a 7400, 112mm bb spindle right here, and it is 100% JIS
The confusion persists with different brands simply because so few tech's have knowledge of a consistently reliable standard method of reference.
If someone substituted an ISO or Campy bb spindle for the proper Dura-Ace part, it would effectively shorten each end of the spindle by at least 2mm (between 2 and 3 mm each end).
The question I have is who wrote your chart?