Para que servem os pelinhos dos pneus?

Os pneus carecas, além de um risco enorme à vida, facilita derrapamentos e acidentes. Mas, ao contrário do que muitos imaginam, aqueles "cabelinhos" da borracha não são responsáveis pela segurança no trânsito.

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Um pneu novo vem com sulcos (esses, sim, importantíssimos) que evitam a água e a aquaplanagem, e também com os pelinhos.

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Conhecidos como aberturas de ventilação, ou bigodes de pneu, esses pelinhos são resquícios do processo de fabricação. Eles surgem quando o molde do padrão da banda de rodagem é pressionado no pneu.

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Esses pelos garantem que não fiquem gases presos ou bolhas de ar no pneu, o que comprometeria sua integridade estrutural e desempenho. Mas a verdade é que, depois que saem da fábrica, eles não afetam a direção e segurança?

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Por que alguns carros têm circulos e quadrados no para-choque?

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