Radial tires create less heat when flexing because the plies are perpendicular to the road at point of contact. Bias ply tires have plies that are perpendicular to each other and at 45 degree angles to the road at point of contact. The plies fight each other when flexing which creates heat and accelerates wear. Since the sidewall plies in the radial tire are not fighting each other there is much less heat created.
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Mech
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