Adapts frames with a non-threaded BB30 or PressFit 30 (PF30) bottom bracket shell to accept traditional, English-threaded bottom bracket & crank applications. BB30: 68/73mm shell width with 42mm ID (and c-clip bearing retention grooves). PF30: 68/73mm shell width with 46mm ID (smooth bore / no c-clip grooves). Includes installation adapters for headset press (Park HHP-2 style) and cylindrical-formula Loctite (Green 609) for a "permanent" installation.