Originally Posted by myke
Thanks for the calculator! I will study it a bit more, but at first glance it would appear that this hub is not in that database, it says SRAM spectro on one side and it has a number 5004 engraved on the inside of the upright/anchor.
I believe the Sram Hub is the old Sturmy Archer. The dimemsions that you need from the hub are the Flange Dia measured from ctoc of two spoke holes 180 degrees from each other, and the center to flange distance which on your front hub should be half the distance between the two flanges. If your hub is the same as the Sturmy the Flange dia should be 90mm and the center to flange should be 27mm.