PF30 bottom bracket
PF30 is a press-fit standard: the bottom bracket shell is smooth on the inside. You recognise a PF30 frame by a shell 68 or 73 mm wide with an inner diameter of 46 mm.
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Sizes of a PF30 bottom bracket shell
68 or 73 mm
Shell width
46 mm
Inner diameter
smooth, no thread
Inside of the shell
Frequently asked questions
CEMA has PF30 bottom brackets for Shimano, SRAM DUB, SRAM GXP, FSA386/Rotor/Raceface 30mm, BB30/PF30, CAMPA UT and PRAXIS M30 cranksets.
Measure the bottom bracket shell: on PF30 it is 68 or 73 mm wide, with an inner diameter of 46 mm.
A PF30 shell is 68 or 73 mm wide, with an inner diameter of 46 mm. A PF30A shell is 73 mm wide, with an inner diameter of 46 mm, and is asymmetric on the non-drive side. Although 73 mm is usually associated with MTB frames, PF30A is used mainly on road bikes and certain gravel bikes. More about PF30A →
A PF30 shell is 68 or 73 mm wide, with an inner diameter of 46 mm. A BB30 shell is 68 or 73 mm wide, with an inner diameter of 42 mm. More about BB30 →
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