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  • inside measures 34.81mm (1.37 inch) from threading to threading. 69.87mm (2.75 inch) from left to right.

  • inside measures 34.81mm (1.37 inch) from threading to threading. 69.87mm (2.75 inch) from left to right.

    If it's 34.8 inside the threads and 70mm wide, there's a good chance that what you have is an Italian frame. Check before ordering! All of the above external cup BBs are available with Italian thread 36mm×24tpi right hand thread on both sides for 70mm shell width as well as British 1.37"×24tpi right hand thread on non drive side and left hand thread on drive side for 68mm shell width.

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