</font><font color="blue" class="small">( How much should it cost to fill tires? )</font>
about $5 for an adapter between your air chuck and your garden hose, for those who live where plain water won't freeze in the tires. See attached.
To use the adapter:
Jack the tire an inch off the ground, and air down to 9 psi. (Lower might unseat the bead).
Clamp the chuck on the tire and install water. The garden hose has more than 9 psi so it will fill easily. Leave the tire valve installed.
After filling about 1/4 rotate the valve to the top, and bleed for a moment to clear water out of the stem so your air gauge won't be damaged.
Check air pressure and make sure you haven't exceeded the maximum stated on the sidewall. Bleed air back down to 9 psi before adding more water.
Repeat fill/check/bleed maybe 4 times until water is nearly up to valve at 12:00 position. Find the water level by rotating the tire to 10:00, 11:00 etc while bleeding off air. I filled mine only to 11:00 so when I check pressure in the future, water won't come out and damage my gauge.
Replace Schrader valves (tire stem valves) with new ones. Mine didn't seal well after this water was put through them.
In the future check air pressure with the valve at the top. First bleed off a little air to avoid damaging the gauge.
The
Goodyear Farm Tire Handbook has charts showing the weight of loaded tires.