Why? When you get a puncture, you get to have the joy of dismantling the tire to patch the tube, rather than just taking a few minutes to put in a plug. And with filled tires, the dismantling operation is even far more fun! Another nice thing about filled tubeless tires is that if you do have a puncture, it is really easy to find the hole.
And then you're on the look out for new rims because yours are rusted out. One of my rigs is a 58 model, still original rims. We run 6 tractors, maybe 3 flats on big rear wheels over 20 years. Lot of front flats, even moreso, but they don't sting as bad.
Both Bioballast and Rim Guard are significantly heavier than water
And significantly more expensive. We build a HD belly pan with 3x6 tubing and 3/8 plate. Covers the extra weight, plus added protection. Debated filling square tubes with lead. I don't quite have enough yet, but I'm close.
Already have the belly pan (I forget if we used 3/8" or 1/2") plus the weight of the backhoe subframe the belly pan is mounted to, a heavil built grill guard, limb risers and FOPS... and still filled reae tires with CaCl (no one was selling Rim Guard or anything like that in my area when I bought this tractor).
A 50/50 mix of antifreeze in tractor tires isn’t cheap either.
Not to mention it's toxic to animals (and the taste is highly attractive to them). Even the RV/Marine antifreeze which is often referred to as "nontoxic" is not really nontoxic - it's just less toxic than regular automotive antifreeze.
Never seen anything but water and no freeze in tires here. A few people grow beets in their gardens, but that's it. Water is plentiful though. Alcohol or anti freeze is readily available. I've always fixed my own flats. Put tires on my vehicles. I have used a tire shop when out of town and in a bind.
We put maybe two gallons in a 16.9-38 tire. It almost got down to freezing once when ize a kid. Just kidding, I've seen single digit negatives a few times here. -90 I have seen twice, but not here.
Perhaps I am wrong, bit I am not aware of many rust problems in tubeless tire and rim setups using beetjuice or windshield wiper fluid or even water. The way I understand it is that it takes O2 to cause rust inside a tubeless rim and unless you frequently change the air in your tires there is a very limited quantity of O2 available to form a dangerous amount of rust.
