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Old 12-22-08, 11:32 AM   #1
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Pls confirm specs for formula th21 36h low flange fixed/free hub

Hi, I'd like to use Damon Rinard's spoke calc xls and want to be sure I'm translating the data on formula brand hubs (model th21, 36h, fixed/free) properly.

th21 flange width = 54mm

** is this the same as Rinard's "W", which is "hub width from center of wheel to center of flange"

th21 P.C.D. = 45mm

** is this the same as Rinard's "d" , which is "diameter of the circle through the centers of the spoke holes"

can th21 spoke hole width be safely assumed to be 2.0mm? formula website lists 14 gauge


Last edited by Flash; 12-22-08 at 11:54 AM.
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