Just read "Flat Free Tires" in Countryside Mag, Vol 94, No 4. These tires (by Marathon, Carefree Tires, andTricam) are made of light polyurethane and are easy to change. They will save lots of energy that the average tire might require of you being patched.
Today you are you, that is truer than true. There is no one alive who is youer than you! - Seuss. Tiny ad:
Switching from electric heat to a rocket mass heater reduces your carbon footprint as much as parking 7 cars