BB30 Different sizes?

Discuss light weight issues concerning road bikes & parts.
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by gogo419

Hi everyone.

Long time reader of WW finally signed up as i need some help. I have been searching google bit can't seem to find what i need. I have a 2011 Felt DA with di2 (BB30) and have recently purchased a Campagnolo SRM. Looking to buy the BB30 cups for the cranks i am faced with two options!?

68X42 or 68X46

Does anyone know which one i need to use on the frame so that i can install the SRM?



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by elviento

If BB30, then should be 68X42. But sometimes people use PF30 and BB30 interchangeably, so you better double check the ID of your BB shell. If 42mm, then BB30. If 46mm, then PF30.
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