A radial tire, also known as a radial-ply tire, is a type of vehicular tire that has cord plies arranged at 90 degrees to the direction of travel, or radially. This design avoids having the plies rub against each other as the tire flexes, reducing the tires rolling friction. Radial technology is now the standard design for essentially all automotive tires. The following are some key features and benefits of radial tires:

Features:

• Sidewall: Consists of one or more cord layers with almost parallel threads.
• Cord plies: Laid bead to bead at 90 degrees that run perpendicular to the direction of travel.
• Flexibility: More flexible tire wall due to the plies laid radially.

Benefits:

• Reduced internal friction: The cord design prevents internal friction by stopping plies from rubbing against each other, resulting in less friction and reduced heat build-up.
• Comfortable ride: Reduced heat build-up helps facilitate a softer and more comfortable ride.
• Fuel efficiency: Radial tires allow vehicles to achieve better fuel economy than with bias-ply tires.
• Long-term operational lifetime: Radial tires have a longer lifespan than bias-ply tires.
• Puncture resistance: Radial tires are more resistant to punctures than bias-ply tires.

In summary, radial tires are a popular type of vehicular tire that offer several advantages over bias-ply tires, including better fuel efficiency, a longer lifespan, and a more comfortable ride.