ITA bottom bracket
ITA is a threaded standard: the bottom bracket shell has an internal thread, so the bottom bracket screws straight into the frame. You recognise an ITA frame by a shell 70 mm wide with an inner diameter of 36 mm (ITA thread).
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Sizes of a ITA bottom bracket shell
70 mm
Shell width
36 mm (ITA thread)
Inner diameter
threaded
Inside of the shell
Frequently asked questions
CEMA has ITA bottom brackets for Shimano, SRAM DUB, SRAM GXP, FSA386/Rotor/Raceface 30mm and PRAXIS M30 cranksets.
Measure the bottom bracket shell: on ITA it is 70 mm wide, with an inner diameter of 36 mm (ITA thread).
An ITA shell is 70 mm wide, with an inner diameter of 36 mm (ITA thread). A BSA shell is 68 or 73 mm wide, with an inner diameter of 33 mm (BSA thread). More about BSA →
Still not sure?
The bottom bracket finder takes you to the bottom bracket that fits your frame in a few questions.
Go to the bottom bracket finder