"
The tires are too wide for the wheels (10.5 inch wide tires on an 8inch
wide
rim). If you go with the factory recommended air pressures your front
tires
will wear on the outsides and your rear tires will wear in the center.
If
you adjust your tire pressures to 28-30 psi rear and 38-40psi front you
will
wear your tires evenly. "
-I tend to disagree with this. 8" wheel is the preferred rim width for
a 31X10.50R15. If they were too wide, the tires would normally wear
quicker in the center than the edges, not vice versa, unless they were
severely underinflated, like say maybe 10 psi under. I do not recommend
changing the air pressure up or down too much from the factory
specifications listed on the placard inside the driver's door jamb, but
if you do, it is critical to maintain the split in air pressure that the
factory has required. (re if it said 32 front and 34 rear, and you set
the front at 28, then set the rear at 30) This differential is required
to keep the truck in a straight line in panic-stop situations.
Deviating from these numbers may cause loss of control and a tailspin.
Just speaking from experience and a billion dollar companies 100
years of testing and working with auto manufacturers. 8 ^ )
Patrick
Firestone, Baltimore
ps- I never have problems with tire wear on my trucks. I average 50-60K
per set, and all I do is maintain the proper pressure, rotate them every
other oil change (every 6K miles or so) and check the alignment and
balance every second or third rotation. I think the rotation in the
most critical step out of all of these.
The tires that get neglected for the first 25K miles are the ones that
are cupped by the time they hit 30K.
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