Full compatibility with all threaded and PressFit standards (BSA, ITA, BB86, BB30, BB30A, BB386, PF30, BB Right, T47). ProTech system: Patented dual-sealing ProTech technology securely connects the two semi-axles inside the bottom bracket, and protects the BB bearings from ingress of water and mud, providing longevity of high performance, even in the worst riding conditions.