calcium cloride in a 11 x 28 tire

Well, I'll actually answer your question :o). Here's a chart that will give you the volume for each tire. For the 11.2x28 that is about 27 gallons per tire. For the concentration, here's a pdf file from DOW (see page 2) that provides for various concentrations in lb/gal. I use 2 lb/gal. That will prevent freezing down to +10 deg F. Below +10, ice crystals will begin to form a slush but the solution will not freeze solid even at much colder temperatures. I have never had a problem in forty years at tempertures getting down to -20 deg F. Some will say to use 3 or 3.5 lb/gal. You be the judge. I just think it is not necessary for anything warmer than -20 deg F. By the way, that concentration is when using 77% flake CaCl. I will add also that I always use tubes and monitor and replace valve cores when necessary (that's not often). I have never had any rust problem at all using CaCl in, as I say, some 40 years in two tractors, one of which has it in the front tires also. Misuse and/or abuse though and rusted rims can be the result but I suspect you already know that.

Rod

the tractor from bouncing like a rubber ball

when tire has only air.

george