bottom bracket cross compatability

marcusjenkins

I have a Person carbon frame with a SRAM Apex groupset. it's OK and has served me well over the last 10 months.
Recently I've started upgrading to a Shimano groupset. I'd really appreciate guidance with bb's. What is the degree of compatibility between manufacturers and their bottom brackets? All group sets have dedicated bb's but is there any difference except quality? Is there an industry standard? I've heard of BB30
but don't know what others standards there are. Any guidance greatly appreciated. Thanks.

marcusjenkins

I have a *Pearson* , rather than a Person frame.

nicklouse

have a read of the standards on Parktools.

you will need a shimano type one for your new shimano crankset.

BB30 is BB30 only and shimano does not do it but reducers etc are available to make it work with 24mm axled cranks.

so what type does your frame have?

marcusjenkins

Thanks for the guidance much appreciated. What type does my frame have? I'm guessing it has a SRAM Apex BB to go with the rest of the group set.
So using my knowledge of MTB stuff xt is good and I reckon I could/should go for Ultegra rather than xtr (Dura Ace). Thanks again.