Aren’t Italian shells a different width?
Edit: yup, Italian shells are 70mm wide.
this is the really odd think. MY bottom bracket shell is only really 65/66mm wide. Look like I'll have to go with Italian bottom bracket though just to get the threads to hold....
Sounds like a bsa shell that's been over enthusiastically faced and chased. Italian threads are different diameter and direction, you won't just be able to pop an italian bb into a bsa shell.
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