murgs_l made a great rim for some cheap tires and i had the same problem,my cheap tires keep falling of my g-made nr02 beadlock rims so i thought of making my own but then i found these and printed one , only to find that it have too much negative offset to be used on the front of a twin hammers and probably other buggy type cars.So i gave the rim some more offset(+4.5mm) and that did it.It is done in thinker cad so it is a bit crude but it works.
Original on the left and my new rim on the right.
I have reduced the center hole to 4mm

Yes

Yes

0.2

20%

printed on Rs idearwerk 3d+pro
material is black PETG and the lock ring is done in green PLA on solid setting