Your brand loyalty is admirable; your acute knowledge of so-called standards gets tested every time you add a new bike to the stable. In a perfect world, you'd be able to easily swap out parts based on what kind of riding you feel like doing that day. But guess what? In a less-than-perfect world, ROTOR designed both the BB 4224 and the BB30 bearing kit for your 30mm BB shell. The BB 4224 and BB30 bearing kit are the "yes" components to "Is this compatible with my 30mm bottom bracket?"