PF30: the 46 mm press-fit bottom bracket
PF30 is the press-fit version of BB30 that uses cups. The frame shell is 46 mm (not 42 like BB30) and holds a 30 mm spindle. The cup absorbs the carbon frame's imperfections, so it creaks less than a direct BB30. It fits 30 mm, SRAM DUB and 24 mm spindles with the right cup.
PF30 was born to fix BB30's headache: the same 30 mm stiffness, but with cups that forgive the frame's tolerances.
What is it?
PF30 is the evolution of BB30. Instead of pressing the bearing straight into the frame, it sits inside a composite cup that presses in. That cup absorbs small carbon imperfections, eases manufacturing and reduces creaking versus a direct BB30.
Specification
What fits
It fits 30 mm spindles, SRAM DUB (28.99 mm) and Shimano 24 mm, by choosing the right PF30 cup. A PF30 frame can also be converted to threaded with a two-piece thread-together bottom bracket that removes play. It is not the same as BB30 (46 vs 42 mm).
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Frequently asked questions
Is PF30 the same as BB30?
No. PF30 has a 46 mm shell with bearings in cups; BB30 has a 42 mm shell with a direct bearing.
Can a PF30 be converted to threaded?
Yes, with a 'thread-together' two-piece bottom bracket whose halves screw into each other inside the shell, removing play and noise.
Does it accept Shimano 24 mm cranks?
Yes, with a PF30 reducer cup for a 24 mm spindle.