Ford F-250 Owner's Manual page 219

WARNING: An inflated tire and rim can be very dangerous if
improperly used, serviced or maintained. To reduce the risk of
serious injury, never attempt to re-inflate a tire which has been run flat
or seriously under-inflated without first removing the tire from the
wheel assembly for inspection. Do not attempt to add air to tires or
replace tires or wheels without first taking precautions to protect
persons and property.
WARNING: Stay out of the trajectory (1) as indicated in the
illustration.
2011 F-250/350/450/550 (f23)
Owners Guide, 3rd Printing
USA (fus)
Tires, Wheels and Loading
219