BBright46 bottom bracket
BBright46 is a press-fit standard: the bottom bracket shell is smooth on the inside. You recognise a BBright46 frame by a shell 79 mm wide with an inner diameter of 46 mm and an asymmetric shell design. BBright is used mainly on road bikes and certain gravel bikes.
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Sizes of a BBright46 bottom bracket shell
79 mm
Shell width
46 mm
Inner diameter
smooth, no thread
Inside of the shell
Frequently asked questions
CEMA has BBright46 bottom brackets for Shimano, SRAM GXP, BB30/PF30, FSA386/Rotor/Raceface 30mm, SRAM DUB and PRAXIS M30 cranksets.
Measure the bottom bracket shell: on BBright46 it is 79 mm wide, with an inner diameter of 46 mm.
Both frame types are BBright models and asymmetric on the non-drive side of the frame. A BBright46 shell is 79 mm wide, with an inner diameter of 46 mm. A BBright42 shell is 79 mm wide, with an inner diameter of 42 mm. More about BBright42 →
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