{"id":72363,"date":"2026-08-12T08:17:49","date_gmt":"2026-08-12T06:17:49","guid":{"rendered":"https:\/\/www.km77.com\/revista\/?p=72363"},"modified":"2026-08-12T08:17:57","modified_gmt":"2026-08-12T06:17:57","slug":"testigo-twi-neumaticos-que-es","status":"publish","type":"post","link":"https:\/\/www.km77.com\/revista\/engendro-mecanico\/testigo-twi-neumaticos-que-es\/","title":{"rendered":"Qu\u00e9 es el testigo TWI de los neum\u00e1ticos"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">El neum\u00e1tico es la \u00fanica superficie de contacto entre el veh\u00edculo y el asfalto. A trav\u00e9s de la huella de pisada se transmiten la totalidad de las fuerzas de aceleraci\u00f3n, retenci\u00f3n y guiado lateral. Para que el compuesto mantenga sus propiedades din\u00e1micas, la banda de rodadura<strong> requiere una profundidad m\u00ednima<\/strong> en sus canales que garantice la evacuaci\u00f3n de agua y el agarre en distintas condiciones de la v\u00eda.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Con el fin de permitir que cualquier usuario o t\u00e9cnico identifique el grado de desgaste del caucho de forma r\u00e1pida y sin necesidad de herramientas de medici\u00f3n espec\u00edficas, los fabricantes integran el <strong>indicador<\/strong>\u00a0<strong>TWI<\/strong>\u00a0(<em>Tread Wear Indicator<\/em>).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfD\u00f3nde est\u00e1 el marcador TWI?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Las siglas TWI responden a la denominaci\u00f3n en ingl\u00e9s\u00a0<em>Tread Wear Indicator<\/em>\u00a0(<strong>indicador de desgaste de la banda de rodadura<\/strong>). Se trata de una serie de peque\u00f1as protuberancias o resaltes de goma de altura calibrada que est\u00e1n moldeados dentro de las ranuras longitudinales principales de la cubierta.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En todos los neum\u00e1ticos homologados para turismo en Europa, estos tacos de caucho poseen una altura exacta de\u00a0<strong>1,6 mil\u00edmetros<\/strong>. Esta cifra no es arbitraria: coincide con la profundidad m\u00ednima de dibujo que exige la legislaci\u00f3n espa\u00f1ola (Reglamento General de Veh\u00edculos) y la directiva europea para autorizar la circulaci\u00f3n de un turismo en v\u00edas p\u00fablicas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para facilitar la localizaci\u00f3n visual de estos resaltes sin necesidad de inspeccionar a ciegas el interior del dibujo, los fabricantes graban una serie de marcadores de referencia en el flanco exterior e interior de la cubierta, alineados de forma radial con los tacos internos. En la mayor\u00eda de las marcas de neum\u00e1ticos se emplean directamente las siglas TWI, aunque algunos fabricantes utilizan s\u00edmbolos propios: <strong>un peque\u00f1o tri\u00e1ngulo<\/strong> orientado hacia la banda de rodadura, la figura estilizada de una mascota corporativa (como el Bibendum en las cubiertas Michelin) o indicadores porcentuales de desgaste progresivo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cuando la goma del dibujo se desgasta debido a la fricci\u00f3n continuada con el asfalto y su superficie queda al mismo nivel que los resaltes del TWI, el neum\u00e1tico ha alcanzado el final de su vida \u00fatil.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.km77.com\/revista\/wp-content\/uploads\/2026\/04\/neumaticos-nuevos-1024x683.jpg\" alt=\"Consumo neum\u00e1ticos nuevos\" class=\"wp-image-68673\" srcset=\"https:\/\/www.km77.com\/revista\/wp-content\/uploads\/2026\/04\/neumaticos-nuevos-980x653.jpg 980w, https:\/\/www.km77.com\/revista\/wp-content\/uploads\/2026\/04\/neumaticos-nuevos-480x320.jpg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) 1024px, 100vw\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Consecuencias de alcanzar el l\u00edmite<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e1s all\u00e1 del \u00e1mbito regulatorio y de las sanciones administrativas derivadas de circular con neum\u00e1ticos desgastados, la presencia del indicador TWI responde a una necesidad cr\u00edtica de la din\u00e1mica del veh\u00edculo: la prevenci\u00f3n del<strong> fen\u00f3meno de<\/strong>&nbsp;<strong>aquaplaning<\/strong>&nbsp;y la conservaci\u00f3n de la capacidad de frenado sobre firme mojado.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La funci\u00f3n primordial de los canales longitudinales y las laminillas de la banda de rodadura es evacuar el agua. Al rodar sobre una capa de agua, los canales recogen el fluido y <strong>lo expulsan hacia los laterales<\/strong> y la parte posterior del neum\u00e1tico. El caudal de agua que el compuesto es capaz de evacuar es directamente proporcional al volumen interno de estas ranuras.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A medida que el dibujo se erosiona y se aproxima a la cota del <strong>indicador TWI (1,6 mm)<\/strong>, la capacidad volum\u00e9trica de los canales disminuye de forma dr\u00e1stica. Diversos ensayos t\u00e9cnicos demuestran que un neum\u00e1tico rodando con 1,6 mm de profundidad puede requerir hasta un <strong>40 % m\u00e1s de distancia<\/strong> para detener el veh\u00edculo sobre asfalto mojado a&nbsp;90&nbsp;km\/h en comparaci\u00f3n con un neum\u00e1tico nuevo (con una profundidad habitual de entre 7 y 8 mm).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Asimismo, la velocidad cr\u00edtica a la que la rueda pierde el contacto directo con la calzada y flota sobre la pel\u00edcula l\u00edquida cae de forma sustancial. Por este motivo, aunque la norma legal fije el l\u00edmite en los 1,6 mm marcados por el TWI, las recomendaciones t\u00e9cnicas de seguridad activa aconsejan sustituir la cubierta cuando la profundidad del dibujo <strong>baje de los&nbsp;3&nbsp;mm<\/strong>&nbsp;en neum\u00e1ticos de verano y de los&nbsp;4&nbsp;mm&nbsp;en neum\u00e1ticos de invierno o todo tiempo.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>El neum\u00e1tico es la \u00fanica superficie de contacto entre el veh\u00edculo y el asfalto. A trav\u00e9s de la huella de pisada se transmiten la totalidad de las fuerzas de aceleraci\u00f3n, retenci\u00f3n y guiado lateral. Para que el compuesto mantenga sus propiedades din\u00e1micas, la banda de rodadura requiere una profundidad m\u00ednima en sus canales que garantice [&hellip;]<\/p>\n","protected":false},"author":93,"featured_media":72367,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[3912],"tags":[7975,22],"class_list":["post-72363","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-engendro-mecanico","tag-de-todo-un-poco","tag-general"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu\u00e9 es el testigo TWI de los neum\u00e1ticos<\/title>\n<meta name=\"description\" content=\"Analizamos qu\u00e9 es el testigo TWI (Tread Wear Indicator) en los neum\u00e1ticos, c\u00f3mo localizarlo en la banda de 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