VISUAL GUIDE FOR INSPECTION AND CLASSIFICATION OF TIRES
2-49. TREAD CROWN CONDITIONS (Con't).
b. Ozone Cracking or Weatherchecking on Tread. The cracks
in this tire extend down into the tread. If the cracks do not extend to far
or down onto the sidewall the tire may be retreaded. Tires which are
weatherchecked in the tread only, may be retained in service provided
the cracks do not extend to the tread lug base or are not 2/32 inch deeper
or deeper in the tread groove area. In most cases if the tread is
weatherchecked so are the sidewalls. Because of the extent of
weatherchecking , this tire would be classified CRC H.
c. Tread Area Tears and Penetrations of Foreign objects. The
tire below and to the left is torn in the tread area close to the tire crown.
The insert shows what the tear looks like inside the tire. The tire on the
right has a nail stuck in a tread groove. Both examples are probably
repairable with a section repair and probably can be retreaded later.
Both tires should be examined more carefully by checking the inner
liner and the extent of cord or ply damage. If the injuries fall within repairable standards the correct
classification would be CRC F.
d. Heel and Toe Wear. The damage shown is the result of
vehicle mechanical deficiencies. If these conditions had been
corrected and the tire rotated in time, premature removal could have
been avoided. If the irregular wear did not cause damage to the
casing, the tire is retreadable. Correct classification is CRC F.