Hi all - questions about three vintage cup and cone BBs that I might convert to CartridgeBB, standard Shimano-isms, keeping the square taper cranks.
The simple question, without all the background: Is the spindle length of a CartridgeBB, say Shimano UN54 or similar, equal length on drive side (DS) and non-drive side (NDS)?
The background. I have three spindles I'm working with, a 3S, a 3T and a 3RR-B.
Compliments of Sheldon Brown, an image at the bottomof the thread;
The 3S is 121.5mm, 'A' the NDSide is 32mm, 'C' the DSide is 37mm - the symmetrical equivalent is 127mm.
The 3T is 123mm, NDS is 32mm, DS is 39mm, SymmEq is 130mm.
The 3RR is 136mm, NDS 42mm, DS 42mm, SymmEq is 136mm......
The big problem is that few if any CartridgeBB spindles exceed 128mm, and if the A and C are equal lengths in the Cartridge BB, then I have to look at spindle lengths of a minimum of 127mm and longer, which is probably not happening...
So to start - are Cartridge BB spindle lengths equal on each side?
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