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					Originally Posted by Hanno Spoelstra  Lynn posted this link also, upon actually reading Kurt Laughlin's article I found an interesting drawing.
 The US 16" rim was 15.965" in diameter and had  5 deg. bead angle.
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 Worth a read if you want to turn down your rims to fit new tyres currently available. 
The 16” divided rim has plenty of thickness to allow machining 0.125” off:
