Answer: The wires near the tires are there to clean them while the truck is moving.
As the vehicle drives, these wires lightly brush against the tire, removing dirt, sand, and small rocks that might be stuck.
This helps keep the tires cleaner and prevents debris from getting stuck in the tread. Debris can affect how well the tires grip the road or cause them to wear out faster.
Overall, this design helps keep the tires in good condition with little effort.