APPENDIX E: GLOSSARY
A chemical that affects the rate of vulcanization of the tread rubber
A bond between materials.
Inspection to determine the condition or state of repair .
A pointed or flat tool used to probe nail holes and injuries.
A removable protective material used on the application side of retread
rubber and repair materials to preserve cleanliness and tackiness.
The inner cord ply of a tire.
The anchoring part of the tire that is shaped to fit the rim. The bead is
heat treated, rubber cushioned, high carbon steel wires wrapped and
reinforced by the plies.
A semihard base rubber wrapped around the bead seats and cured as an
integral part of the tire. It holds the bead cables firmly and rigidly in place
and prevents moisture from attacking the metal bands .
The lower outside edge of the bead that rests against the rim flange.
A breakdown of the bond between components in the bead area .
Bead-to-bead Measurement The distance from the heel of one bead measured 90° straight up over the
crown and down the other side to a position on the heel of the other bead
directly opposite the starting point.
The lower inside edge of the bead that rides on the rim.
A powdered coating generated on raw rubber stock due to age in storage.
Usually the first sign of deterioration. See Ozone.
See Ply Separation.
Sticking two materials together using adhesives or other means .
A bead deformed into an elliptical (oval) shape.
A crack extending into or through the fabric. An impact break is usually
in the shape of an "X" or star and can be seen from the inside of the tire.
A flex or circumferential break runs parallel to the beads.
A band or strip of rubber-coated bias cut tire cord placed
circumferentially around the tire between the last ply of casing fabric and
tread. Sometimes called the impact or shock ply.