Technician A says radial ply tires are more rigid in the sidewall area than bias ply tires. Technician B says the belts in a radial tire restrict tread motion during contact with the road, thus improving tread life and traction. Who is correct?

Question

Quizplus · Accepted Answer

Radial ply tires have more flexible sidewalls compared to bias ply tires, but the belts in radial tires do help improve tread life and traction by restricting tread motion.

Technician a Says Radial Ply Tires Are More Rigid in the Sidewall