Striking an object, such as a curb, can cause internal
tire damage. If an object is struck, remove and in-
spect both the inside and outside of the tire. A dam-
aged tire can adversely affect stability and handling,
which could result in death or serious injury.
TIRE REPLACEMENT
Inspection
Tread wear indicator bars will appear on tire tread
surfaces when 1/16th in. (1.6 mm) or less of tire tread
remains. Always replace tires before the tread wear
indicator bars appear on the surface of the tire.
See Figure 58. The location of tread wear indicator bars
are identified by „TWI‟ markings on the tire sidewalls.
When to Replace Tires
New tires are needed if any of the following conditions
exist:
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1. Tread wear indicator bars become visible on the
tread surfaces.
2. Tire cords or fabric become visible through
cracked sidewalls, snags, or deep cuts.
3. A bump, bulge, or split in the tire.
4. Puncture, cut, or other damage to the tire that
cannot be repaired.
Wear
Bar
"TWI"
Figure 58