I’ve managed to get a hold of a few Suntour Bottom brackets and thought others might be interested in them and the various ones. These are all english thread but the application extends to italian thread as well.
For other pics you can view the set here
I haven’t had time to figure out the actual angle of the taper so that there’s a definitive answer to that question but in fitting my superbe pro cranks to both ISO and JIS, each were fine but the engagement wasn’t 100% and you could wiggle the cranks on the spindle a bit prior to tightening the bolts. However when I slipped the superbe pro cranks onto the superbe tapered spindles they fit like a glove with no wiggle at all.
This doesn’t mean you can’t use ISO with Superbe, it’s just better when you use superbe with superbe. For all those who are out there looking for BB’s there’s a few on ebay at the moment so I’d recommend getting them if you have Superbe cranks.
Regarding using a 113mm spindle for track frames, you can flip it an use the short side and things might work (I didn’t try this) or if your chain line is out that much then the road spindle is for you. Hope this helps those who aren’t sure what goes with what, and to clear up any misnomers from ebay sellers stating the wrong spindles.