FORD 2013 F-550 v.1 - Manual (Page 357)

Important: Remember to replace the wheel valve stems when the road
tires are replaced on your vehicle.
The two front tires or two rear tires should generally be replaced as a pair.
The tire pressure sensors mounted in the wheels are not designed to be
used in aftermarket wheels.
The use of wheels or tires not recommended by Ford Motor Company may
affect the operation of your tire pressure monitoring system(if equipped).
If the tire pressure monitoring system indicator is flashing, the system is
malfunctioning. Your replacement tire might be incompatible with your
tire pressure monitoring system, or some component of the system may
be damaged(if equipped).
Safety Practices
WARNING: If your vehicle is stuck in snow, mud, or sand, do not
rapidly spin the tires. Spinning the tires can tear the tire and cause
an explosion. A tire can explode in as little as three to five seconds.
WARNING: Do not spin the wheels at over 35 mph (56 km/h).
The tires may fail and injure a passenger or bystander.
Driving habits have a great deal to do with your tire mileage and safety.
• Observe posted speed limits.
• Avoid fast starts, stops and turns.
• Avoid potholes and objects on the road.
• Do not run over curbs or hit the tire against a curb when parking.
Highway Hazards
No matter how carefully you drive, there is always the possibility that
you may eventually have a flat tire on the highway. Drive slowly to the
closest safe area out of traffic. This may further damage the flat tire, but
your safety is more important.
If you feel a sudden vibration or ride disturbance while driving, or you
suspect your tire or vehicle has been damaged, immediately reduce your
speed. Drive with caution until you can safely pull off the road. Stop and
inspect the tires for damage. If a tire is under-inflated or damaged,
deflate it, remove the wheel and replace it with your spare tire and
wheel. If you cannot detect a cause, have the vehicle towed to the
nearest repair facility or tire dealer to have the vehicle inspected.
356 Wheels and Tires
2013 F-250/350/450/550 (f23)
Owners Guide gf, 1st Printing
USA (fus)