I am moving dirt in my backyard, and with the heavy load, I got
four flat tires on my wheelbarrow. No puncture, just air escaping
at the junction of tire and wheel. I can not pump it and I have to
take it to the tire shop where they are usually able to inflate it
with compressed air. I don't want to buy another
wheelbarrow so I can get a spare wheel for quick substitutions,
but where can I get a spare wheel? Home Depot does not have it.