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You can see in the right hand diagram that, if Ch is the hub center and Cf is the fork center: Ch = L + H/2 Cf = F/2 And looking at the diagram, it's also obvious that: D = Cf - Ch So, substituting for Ch and Cf: D = F/2 - L - H/2 The diagram also clearly shows that: F = L + H + R So you can substitute the above expression for F into the expression for D: D = (L+H+R)/2 - L - H/2 |
If you like this wheelbuilding document, you'll love my books. See the entire list at http://www.troubleshooters.com/bookstore. |