The PressFit 30 bottom bracket or PF30 is also a commonly used bottom bracket. The PressFit 30 bottom bracket differs from the BB30 in that it has a larger housing diameter of 46mm. The PressFit 30 bottom bracket does not differ in diameter between road and mountain bike, but for the road bike only the PressFit 30 bottom brackets with 68 mm housing width are available and for the mountain bike the PressFit 30 bottom brackets with a housing width of 83 mm and 73 mm can be used. The actual bearing lies in a so-called bearing shell, which is then pressed into the bicycle frame together with the bearing. Just like the BB30 bottom bracket, the PressFit 30 is designed for crankshafts with an outer diameter of 30 mm.