Old 02-29-16, 12:48 AM
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thanks people.
I'll remeasure the shell but I'm pretty sure it reads > 69mm. But that's what got me feeling like I couldn't believe my eyes.
As for the spindle, the B measurement must correspond in some way to the combination of the shell, cup and bearing widths - if the spindle is too long by a few mm, the adjustable cup might still allow a fit, but if the spindle is too short (B measurement) the bearings won't sit on the spindle races AND the cup races.

The crankset is made by Sugino - and from what I've read, in the old days, some Japanese models were ISO, with JIS introduced in the mid-80s or so. Hard to tell.

In any case, thanks for all the input. If someone owns an 81 Royale with the original BB spindle, I'd love to know it's markings/measurements. Thanks!
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