6.2.5.e Cushion layer
The cushion ply (and breaker) bonds the tread to the carcass and protects it from impulses and shocks taken by the tread from road bumps. It usually consists of several layers of sparse rubberized cord, the thickness of the rubber layer in which is much greater than that of the carcass. The thickness of the cushion ply is 3-7 mm, and the number of cords depends on the type and purpose of the tire. Sidewalls protect the frame from damage and moisture.
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