I can tell you that my pair of bike tires is now 13 000km old, still going strong, and weighs about 790g each. It may loose maybe 100 or 200g over it's lifetime

I can tell you that my pair of bike tires is now 13 000km old, still going strong, and weighs about 790g each. It may loose maybe 100 or 200g over it's lifetime, but unlikely that it's even that much. Worst case estimate so far would be 790g/13 000km, or 0.061g/km per wheel - under the assumption that the whole tire is consumed.