A truck tire is made up of seven kinds of material. The rubber compound contains natural rubber (around 30 percent), synthetic rubber (around 5 percent), halogenated butyl rubber (around 4 percent) and chemicals (around 37 percent). Then there are the reinforcing materials, including steel cord (accounting for around 15 percent of the material in a tire), bead wire (around 6 percent), and nylon tire cord fabric (around 1 percent).
A tire comprises bead, casing, belt, tread and sidewall. The inner liner (an inner layer of rubber) keeps the tire airtight. The seven components of a tire are: the tread strip (1), multi-ply steel belt (2), steel casing (3), inner liner (4), sidewall (5), bead reinforcement (6) and bead core (7).
