starting point is the Centerline through the bicycle .

60mm of a 120 wide rear drop-out, 34mm of that 68mm wide BB shell , 50mm of the 100mm wide fork tip spread. as if to cut the bike in half right down the middle .


so as is original parts how far is the chainring from the centerline .. It needs replicating with the New (totally Unknown combination of) parts..

Nothing I can say sight unseen Hence the go to a bike shop suggestion.. Good Luck .. It may not be as Cheap as you Desire..

At least square taper cranks as a Type offer a variety of BB spindle length choices .