To tread again.

To remove the outside, or tread, of a tire and add a new tread. Retreaded tires work just as well as new ones and require less energy and money to make.

a used automobile tire that has been remolded to give it new treads

give new treads to (a tire)

A used casing which has new tread rubber applied to it.

A process in which a new tread cap is applied to a casing of a tire that has been worn down.

A retread, also known as "recap," is a manufacturing process designed to extend the useful lifespan of a worn tire. The word retread can also refer to a tire which has been taken through this process.