OK Guys, with all the recent talk about the differences in materials used for ballast, here's a chart showing the [b:88d266c93c]approximate[/b:88d266c93c] volumes for various size tires with the weight shown for water only,Anti-freeze,and calium chloride at two different mixes. I personally would believe that the washer fluid being talked about earlier would weigh right about the same as water alone, although I have no hard information to back this up. Again the figures used for the volumes of each tire are [b:88d266c93c]approximate[/b:88d266c93c] and I take no responsibility for them being correct. If anyone has better figures, please let know and I'll make corrections.Enjoy , and don't beat me up too bad.