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