Writer , Charles Goodyear for developing these compounds . They can be made from various raw materials . Tire casings are made up of a series of cords , which form layers . Tread ##s are first used for traction in ` ` virtual reality ''
Writer credits Charles Goodyear for developing rubber compounds . Tires may be constructed from 200 raw materials . Tire casings are made up of a series of cords , which form layers . Tread designs are first tested for traction in `` virtual reality ''