Hawk Racing BB30 bearings fit directly into the frame.
Launched in 2000, BB30 standard has been progressively substituted with newer standards like PressFit 30. But for long, It was widely used on Cannondale frames (SuperSix Evo, SystemSix, Synapse, Slate, Slice) and by other brands like Look or Time.
Reviewed on aerogeeks
NOTE : If you experienced some unpleasant creaking on your BB30 bottom bracket shell in the past, instead of grease, you may consider applying some retaining compound like Loctite 609 on your bearings prior to mounting.