T45 bottom bracket
T45 is a threaded standard: the bottom bracket shell has an internal thread, so the bottom bracket screws straight into the frame. You recognise a T45 frame by a shell 82.5 mm wide with an inner diameter of 44 mm (T45 thread).
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Sizes of a T45 bottom bracket shell
82.5 mm
Shell width
44 mm (T45 thread)
Inner diameter
threaded
Inside of the shell
Frequently asked questions
CEMA has T45 bottom brackets for Shimano and SRAM GXP cranksets.
Measure the bottom bracket shell: on T45 it is 82.5 mm wide, with an inner diameter of 44 mm (T45 thread).
A T45 shell is 82.5 mm wide, with an inner diameter of 44 mm (T45 thread). A T47 Outboard shell is 68 or 73 mm wide, with an inner diameter of 46 mm (T47 thread). More about T47 Outboard →
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