| I have an 1887 G & J 52" Challenge, with markings and components that match up (rim, forks, spine...). During restoration, I noticed that the hub (radial) is marked: C. 54 (with the C. above the 54). "Presuming" that the "54" stands for 54", I'm wondering if there might have been different hubs for different sizes? I don't know why the other sizes might take a different hub unless maybe a different spoke count somewhere between the smallest and largest sizes (my 52" rim takes 56 spokes, same as the hub). Would be interested in any thoughts.