Question

the part of the tire that is in direct contact with the road: sidewall bead filler cord body beads tread belt plies inner liner

Explanation:

The tread of a tire is specifically designed to be in direct contact with the road. It provides traction, grip, and wear resistance, while other parts like sidewall, bead filler, etc., have different functions (e.g., sidewall for protection, bead for fitting to rim).

Answer:

Tread