Originally Posted by operator
BB sizes are referred to like this
1.37" 68x126 Square taper.
That is all the pertinent information you need to know. First item is the 1.37 which refers to the threading, second is BB shell length, third spindle length then finally the type of interface.
True in the world of symmetrical axles. For asymmetrical axles you also need the offset. And a calculator.
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