Put antifreeze in them too maybe just an idea. We also had water in them rear tires in 460 IH farmall and i dont see any problems with them.
I had CaCl that was installed in the tires of my 800 at the dealer (back in 1963). Over the course of 40 years, the rims disintegrated from the inside out. As a result, I'm a bit leery of filling tires with anything.
The weights are made out of 5-sections of 2x3 steel tube that are filled with lead.
How does one go about filling a steel tube with lead? I have a weight box that I'd like to fill with something heavier than concrete. These would be perfect, but I'm not sure where to get lead, and how to get it hot enough to pour in the mold.