FORD 2010 E-450 v.2 - Manual (Page 140)

Note: Some spare tires operate at a higher inflation pressure than the
other tires. For T-type/mini-spare tires (see Dissimilar Spare
Tire/Wheel Information section for description): Store and maintain at
60 psi (4.15 bar). For Full Size and Dissimilar spare tires (see
Dissimilar Spare Tire/Wheel Information section for description):
Store and maintain at the higher of the front and rear inflation pressure
as shown on the Safety Compliance Certification Label or the Tire Label.
6. Visually inspect the tires to make sure there are no nails or other
objects embedded that could poke a hole in the tire and cause an air
leak.
7. Check the sidewalls to make sure there are no gouges, cuts or bulges.
Tires, Wheels and Loading
140
2010 Econoline (eco)
Owners Guide, 2nd Printing
USA (fus)