Industry News

Nomenclature for Truck and Bus Tire

Update time : 2015-01-22 11:22:00

1.Tread: The tread is the part of a tire that contacts the road surface.
the tread consist of a layer of rubber compounded to suit the application purpose of the tire, and the thickness serves to protect the belt and carcass. Depending on the application a suitable tread pattern is moulded at the time of curing. The tread pattern serves the purpose of improving water drainage, providing traction, braking, and cornering characteristics and long tread life.
2.Shoulder: The shoulder on each side of the tread is designed to protect the belt and carcass of the tire and to dissipate heat generated during running to the atmosphere.
3.Sidewall: The sidewall on each side of the tire, between the shoulder and the bead is the section that deflects most during running. The rubber coating serves to protect the carcass.
4.Bead: The bead area supports the extremities of the carcass on each side of the tire. this is the part of the tire that anchors the tire to the wheel.
5.Belt: The belt is a reinforcement layer extending around the outer circumference of the carcass under the tread. It acts as an iron hoop in improving the stiffness of the tread area. In the case of truck and bus tires, the belt is more heavily reinforced compared to passenger car tires.
6.Carcass: The carcass is the load-bearing framework that forms the body of the tire. It is composed of rubber-coated steel cords laid in a radial direction. In consideration of the importance of a tire’s load-bearing capability, truck and bus tire carcasses are more heavily reinforced than those of passenger cars. The carcass contains the inflation pressure aiding in supporting the load and absorbing impact.
7.Inner liner: The inner liner is a layer of special rubber that has a high resistance to air migration.
8.Bead filler: This is a reinforcement rubber that has a triangular cross-section and which is used to increase the stiffness of the bead.
9.Bead wire: A ring-shaped reinforcement material that is made by bundling together several steel wires.
10.Nylon chafer
11.Steel chafer: The chafer fabric and/more steel cords is wrapped around the bead section in order to reinforce it. It is conventionally composed of steel. However, the specification may sometimes call for the use of nylon.

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