Hi Raoul, Thanks for the Info on this Tyreing, I have seen the USA version of our solid tyreing we have here in England, This is fitted the same as you are descibing, with a wire through it. I actually have about 10 coils of the English version here in variuous diametre's, which i sell and fit to high bicycles and pre 1890 machines, The English solid tyeing has a cork screw wire through it, It is easier to fit and you dont need a machine to fit it. I could fit this to the rims, but the 1" dia red I have is very heavy and would hammer the rim to bits. The Stuff you are talking about sounds like the solid US stuff, but hollow. ?
This might just do the trick?
Yours Tim Gunn,
Near London, (Raining), England