Not the cups. The BB was in the wrong way round. Groove on the wrong side. Apparently. I put it in so that you could read what's on the bb from sitting on the bike. But that didn't go in so I turned it around.
I thought that was correct?
Eh... I might go have a look with some vernier calipers later, but I'm pretty sure the main BB body is the same diameter all the way along. And I reckon the RHS cup is a little looser than the LHS, so it must have been machined out 0.0000001mm more ;-)
Glad you didn't strip the threads on your frame though, that would be a sad moment.
I thought that was correct?
Eh... I might go have a look with some vernier calipers later, but I'm pretty sure the main BB body is the same diameter all the way along. And I reckon the RHS cup is a little looser than the LHS, so it must have been machined out 0.0000001mm more ;-)
Glad you didn't strip the threads on your frame though, that would be a sad moment.