Originally Posted by baxtefer

guys, he's trying to do it with the new Campy Ultra-Torque cranks. He can't change out his BB spindle to futz with chainline.

install the cranks then measure the position of both rings.
the inner ring will likely be the closest one to 42mm. if it's within ~2mm then use it.

if neither is close to 42mm then get a different crank.

though another option would be to get hubs that have a non-standard chainline. like pauls' (44mm)