this was my other thought.

I didn't count teeth yet, had to run after the first post and won't be back till late. so as of now I have to assume anything bc i'm not with the bike. but again, I was basically making sure fsa didn't do something weird and somehow use 2 different sizes. that's a pretty bad **** up on their part either way because one of those is wrong (the inner I'm sure, I know I'm spinning a 53/11 by power/computer). I didn't think that big of a mistake could happen. but I suppose if it were a whole batch it'd be easiest to throw them on oem bikes.