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  1. #1
    Are you with me Flash's Avatar
    Join Date
    May 2002
    Washington D.C.
    My Bikes
    Giant TCR Advanced SL, Blue T-14 TT bike
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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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