columbus is above 531 and is the same as current 753 i'm told, but u also get columbus s, sx and slx in ascending order
columbus didnt make anything to better 753 at that time thats why eddy merckx used it !
@dogsballs started
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columbus is above 531 and is the same as current 753 i'm told, but u also get columbus s, sx and slx in ascending order