All of the following statements are correct except .
a. belts are reinforcing materials that encircle the tire under the tread
b. the carcass of a tire is made up of plies, layers of cloth, and rubber
c. most tread patterns are designed to work well on both wet and dry roads
d. the bead is the decorative pattern at the outer edge of the tread

d

Explanation:

a) Is a correct statement as belts are reinforcing materials that encircle the tire under the thread. it acts as a protecting layer.

b) This is also a correct statement as the carcass of tire is actually made of plies, layers of clothes and rubber.

c) Again true as the pattern of most of the thread are made and designed in such a ways that vehicle can drive on any road whether wet or dry.

d) This is an incorrect statement as beads are not the decorative pattern at the outer edge of the tread.