Question

the outermost layer of the tire:
sidewall
bead filler
cord body
beads
tread
belt plies
inner liner

Explanation:

The outermost layer of a tire that comes in contact with the road is the Tread. The tread provides traction, durability, and resistance to wear. Sidewall is the outer side part, Bead Filler, Cord Body, Beads, Belt Plies, and Inner Liner are internal or non - outermost contact layers.

Answer:

Tread