Well, it could be the way the initial installation of calcium is made. Back in 1989 I purchased a new John Deere 850 from a well known dealership about 100 miles from me. This was in R-1's. Now, I was religious about replacing the tire valve cores annual, cleaning up whatever spillage there was, and keeping the stem area covered inWD-40. Never had a bit of rust in 20 years. Then, due to weather cracking I replaced the tires at a tire place that was the only one to handle calcium. Lasted 2 years before severe rust stated on those rims.
When I replaced the tractor, I had the tires loaded with windshield washer fluid at the recommendation of the tractor dealership (Kioti).
I only replaced the tractor due to 4 back surgeries and just couldn't move snow anymore with a clutch and went hydrostatic .
However, I agree, beet juice weighs the most, and is safe, but expensive. WW fluid is cheaper and probably just as safe, if not as heavy .