do somebody here know or have dimensions standards on steel-rims for 12.00 R 20 tire
What do you want to know? It's pretty basic really. The 20 is the diameter of the bead (hole) and the 12.00 is the width. It would most likely be mounted on a 10 to 12 inch wide rim.
that I do know, but It´s the bead itself i need dimension and type on.
Separate names with a comma.