Originally Posted by
TrojanHorse
...(for example, Shimano doesn't make any BB30 equipment as far as I know, so you may see a bike with all shimano drive train and a FSA crank)
Bikes with all Shimano and FSA cranks are actually very common. But incidentally - SRAM
does make BB30 equipment, and it's common to see Force cranks on bikes that are otherwise all-Shimano.