I been trying to draw this up in SketchUp, but the drawing you gave me doesn't seem to add up ...

So I want to confirm that 14" ( 355.6 mm ) is the diameter of 'seat' for tyre, width of spoke is 63.7 mm and that center hole is 93.1 mm ... ?

Add : Ok - I think I have worked out what's going on - the copy has made the join @ spoke edge with a continuous ring - where as the original is just welded strait on it ... :/
The ring would make it stronger - but changes the look a bit ( which was throwing me until I figured it out ) Do you still want this ring ?
Cheers, Bantum ...