How to identify bottom bracket type

[Lumberjackd]

Hi, I'm looking to get a left side crank power meter, but I can't figure out this whole bottom bracket type thing (GXP or BB30). How do I tell which I have?
I have a specialized allez elite (2018 or 2019, can't remember).
Thanks for any help

[Nikko]

Hi.
It has to be a threaded bottom bracket, and I am pretty sure that it is Praxis M30 (like this one)