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Can anyone help me with bb size ?(2 posts)

Can anyone help me with bb size ?AC55
Jul 15, 2002 9:10 PM
I've got a new colnago mxl and i'm buying a dura ace build kit my question is can anyone tell me what the correct size bb is. Also I believe I was told it was italian thrd's. Thanks in advance.
re: Can anyone help me with bb size ?boneman
Jul 16, 2002 1:12 AM
All you need to do, I assume it's 7700 DA, is specify Italian threads and that it's not (or is) a triple. The cups work in the DA (and Ultegra which is sealed) are made so that the BB's of varying widths can be accomodated.
Typically Italian bikes used to have 70mm width bb shells and the majority of the other countries used 68mm. No hard fast rules but general.

You might want to look into using an Ultegra BB as they're a sealed cartridge unit and are probably lower maintenance than the DA.