+ 1 on hands on is the proper way to find out..
the Frame remains, get the BB & crank from the same vendor at the same time
..
Crank designs vary , Aka profile, it's whether the crank comes in to meet a shorter spindle,
or the spindle has to be longer to reach the crank arm.. as it is.
older crank were pretty symmetrical , arms similar, Other than the spider, [Old Campag/TA]
so BB has to be longer on drive side because of space needed for mounting the chainrings.
....
Last edited by fietsbob; 03-23-17 at 08:56 AM.