Hello, I know this question has probably been asked a million times but here it goes. I have a Giant Anthem with a GXP push press and I believe it is a BB92. I am thinking of getting an X7 crank. will it fit the bottom bracket i have? What confuses me is that the X7 i want to get says the BB shell width 68mm, 73mm. Do i need to worry about that? Any help is appreciated.