The widest part of a 650x38B tire is located 320mm from the axle center
https://www.bikeman.com/bikeman-blogs/650blog/1771-650b-conversion-guidlines
this was my effort:
https://www.lfgss.com/conversations/301620/
@russmeyer started
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https://www.bikeman.com/bikeman-blogs/650blog/1771-650b-conversion-guidlines
this was my effort:
https://www.lfgss.com/conversations/301620/