12-69
2 Checking tread depth
Check that the tread is sufficiently deep around its
entire circumference.
Tire tread depth should be checked with a gauge.
However, tread wear indicators on the tires also
enable the tread depth to be checked.
When the tread wears down, wear indicator
(interrupted sections of the grooves) appear across
the tire at the locations corresponding to the
marks.
Replace the tire as soon as the wear indicator show
up as continued use is dangerous.
NOTE:
Hydroplaning can occur when driving on a wet
roads at high speeds. When a vehicle hydroplanes,
tires ride up on and slide over a film of water, caus-
ing the driver to lose control of both steering and
braking.
3 Checking for cracks, damage, and
objects embedded in tread
Check both the tread and the sides of each tire for
cracks, damage, and excessive or unusual wear.
Check also for metal pieces, nails, and stones that
might be embedded in the tread or caught between
the tires of dual wheels.
Tire groove
depth
Normal roads: 1.6 mm (2/32 in.)
Freeways: 3.2 mm (4/32 in.)
WARNING
Tires with insufficient tread depth can skid
on slippery road surfaces and can hydro-
plane when used on wet road surfaces at
high speeds. Worn tires should be replaced
as soon as possible.
WARNING
Severely damaged or worn tires are suscepti-
ble to puncture during use and should be
replaced as soon as possible.
Z12126
<Rib-type tread>
<Traction-type
tread>
Z12127
FKFM.book Page 69 Wednesday, January 28, 2009 9:21 AM
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