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@Bikebuilder
Ron, thanks for raising the potential problem of crank clearance.
I’ve studied the White Industries instruction and taken some measures. The instructions say that ”… measure from the center of the BB shell back along the chainstay 180mm. At that point, measure across the stays. Your measurement should be from the outside of the stay to the opposing outside stay. If the measurement is 135mm or less, use a 113mm BB.”
Given that the measure on my frame is 104 mm, I guess that a 103 mm BB shouldn’t cause clearance problems. Is my reasoning correct?