Ford F-650 2008 User Manual page 206

Maintenance and Specifications
Loads
Loading tires beyond their rated capacity decreases tire life
requiring more frequent replacement of tires. Overloading
creates an unsafe condition that may result in sudden air loss from a
tire failure resulting in an accident that could cause property damage,
personal injury or death.
Note: Your GAW/GVW rating is correct at the time of your vehicle
production, and reflects the exact rating of the tires specified. When
replacing tires be sure that the replacement tire load rating (listed in
pounds and kilograms on the tire sidewall) is the same or higher than
the tire that is removed. Failure to do so will adversely affect maximum
load carrying capacity. Tires with the same size specification do not
always have the same load specification.
Matching
Dual Tires: Dual tires should be matched using tires of equivalent size.
Tires which differ more than
(19 mm) in circumference should not be mounted on the same dual
wheel assembly.
Mixing: Never mix bias and radial tires on this vehicle. Never mix
different tire sizes or constructions on the same axle. Note: Never mix
bias and radial tires on this vehicle.
Rotation:
Rotation is always advisable:
1. If front (steering) axle tires become irregularly worn, move to rear
position.
2. In a dual assembly, reverse the position of the tires if one tire wears
much faster than its mate.
3. On the drive axle, if heel and toe wear or alternate lug wear occurs,
rotating the tires from one end of the axle to the other end of the axle
may help even out this wear.
Rotation may not advisable:
1. Front (Steering) Axle: Tires must be removed when tread is worn
to 4/32 inch (3 mm) or less. Retread or rotate worn tires to drive
position. Retreaded tires are not recommended to be used on steering
axles.
2. Rear Axles: Tires must be removed when tread is worn to 2/32 inch
(2 mm).
206
2008 F-650/750 (f67)
Supplement
1 ⁄ inch (6 mm) in diameter or
4
3 ⁄ inch
4