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Sidewall construction, from inside out:
Innerliner: a thin layer of rubber that is almost impermeable to air.
Body ply or plies: Tire cords extand from bead to bead, and wrap around the beads. The cords are embedded in thin and stiff rubber The rubber must be stiff because the cords are stiff.
Sidewall: Soft rubber, which is an abrasion layer to protect the cords. It is soft so that continual flwxing won't build up heat that would destroy the SW. It also provides the depthe needed to
The upper and lower sidewalls also have other components. Those are wedge-shaped. They transition from the harder tread package and very hard bead.
Innerliner: a thin layer of rubber that is almost impermeable to air.
Body ply or plies: Tire cords extand from bead to bead, and wrap around the beads. The cords are embedded in thin and stiff rubber The rubber must be stiff because the cords are stiff.
Sidewall: Soft rubber, which is an abrasion layer to protect the cords. It is soft so that continual flwxing won't build up heat that would destroy the SW. It also provides the depthe needed to
The upper and lower sidewalls also have other components. Those are wedge-shaped. They transition from the harder tread package and very hard bead.
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