You can add to your data table some of my info. MTB clamp area outside diameter 25.4 or 31.8. Road clamp area outside diameter 26.0 or 31.8. Road bar outside diameters away from the clamp area 24.0. Most clamp on aerobars 22.5 (not Vision). I don't have the OD for MTB bars away from the clamp area but it is not the same as a road bar and thus the controls do not mix and match well.