CHAPTER 2. CARE, MAINTENANCE, AND INSPECTION (Con't)
SECTION III. UNIT MAINTENANCE (Con't)
2-23. TIRE INSPECTION (Con't).
a. INSPECTION OF TIRE TREAD AND SHOULDERS (Con't).
(5) Tread lift and separation which is indicated by a bulge on the tread shoulder or tread face
area and may result in splits through the bottom of the tread groove or complete loss of a section
of tread. Usually localized wear in the tread above the separated area will occur.
(6) Brake skid damage that extends 2/32nd inch or more below the tread. This damage is
indicated by a localized spot of excessive wear across the tread face showing abrasion marks
from the tread sliding on the road surface.
(7) Tread chunking which is indicated by sections of the tread torn from the tire.
(8) Petroleum or chemical damage indicated by localized blistering or spongy or deteriorated
rubber in the tread area.
(9) Excessive tread wear.
2-24. TREAD DEPTH MEASUREMENT
a. TREAD WEAR BARS.
Some tires are designed with built-in wear bar indicators. These tires will show solid bars of rubber
across the tread crown area when wear is sufficient to be removed from service and turned in for
WEAR BAR INDICATORS