The sidewall typically extends from the exterior of the bead area to the shoulder of the tire. This component in a tire has three functions;
Protect the side of the tire from damage due to curbs or other foreign objects.
Due to flexing as the tire passes through its loaded footprint, it must also demonstrate fatigue and aging resistance and protect the tire casing
Via lettering on the sidewall, provide structural information (plies, belts, load carrying capacity) and other regulatory information such as place and date of manufacture, and if needed, white strips (white sidewall), raised white letters, the tire brand or model and name of the manufacturer.
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