not cold in pa? really? just put windshield washer fluid in tires, easy to get, cheap, easy to put in tire.Beet juice is all the rage but it's expensive. Salt is cheap but corrosive. Why not sugar? I doubt there's anything unique about beets that makes their juice "special", more likely it's just the high sugar content. You can dissolve more sugar per gallon than salt so you'd get more weight per tire. Sugar is a little more money than salt but still cheap. Freezing point may not be as good as salt water but it doesn't cold enough in PA to worry about that.
Thanks
Dave