Tutorial: Jefes de tubo superior DIY

Soy un gran admirador del relativamente nuevo "estándar" de almacenamiento en el tubo superior de montaje directo. Y puse esa palabra entre comillas porque nunca tuvo la intención explícita de ser un estándar, sino que se convirtió en uno por la práctica de la industria. Introducido en 2009 por Trek en el Speed ​​Concept original, el estándar básicamente consiste en un par de roscas hembra de agua M5, espaciadas 63 mm, lo que le permite atornillar cosas al tubo superior. Resulta que este es exactamente el mismo roscado y espaciado que se usa para los portabotellas de agua estándar. Es una forma sencilla, elegante y aerodinámicamente limpia de agregar espacio de almacenamiento a su bicicleta sin recurrir a velcro, bridas ni adhesivos. Me encanta. Y aunque muchos otros actores de la industria han adoptado esta característica para convertirla en una especie de estándar de facto, todavía hay algunos que se resisten a implementar esta solución brillante y obvia.

En el pasado, he trabajado a menudo con atletas para realizar construcciones y modificaciones especiales de bicicletas en lo que llamo nuestro Tratamiento de Curso de Servicio. Recientemente, construí una Blue Triad SL para el triatleta profesional australiano Paul Matthews. Uno de los cambios que hice en su bicicleta fue agregar salientes de almacenamiento al tubo superior para atornillar una caja TorHans Aerobento, proporcionándole algo de almacenamiento aerodinámico y también ocultando completamente sus cables. MUCHOS lectores me preguntaron cómo lo hice y este artículo es la respuesta. Es un breve tutorial sobre cómo instalar tus propios jefes de tubo superior en cualquier bicicleta. Las bicicletas de este tutorial están hechas de fibra de carbono, pero funciona igual sin importar de qué material esté hecha tu bicicleta. Además, tenga en cuenta que perforaremos agujeros en el tubo superior, lo que anulará la garantía y posiblemente provocará daños estructurales. Personalmente, no tengo miedo de hacerle eso a mis bicicletas y tengo confianza en que no causará ningún problema. Pero si te preocupa que tu bicicleta se caiga a pedazos si le haces un pequeño agujero, entonces querrás evitar este tipo de modificación.

La solución es, en una palabra, Rivnuts. Específicamente, M5 Rivnuts, el tamaño utilizado para los portabotellas de agua y las cajas de almacenamiento del tubo superior. Estos insertos roscados especiales te permiten agregar una tuerca de anclaje en un orificio ciego (un orificio al que no tienes acceso por la parte trasera) y, en la mayoría de los casos, esto es lo que tu bicicleta ya usa para sus otros soportes para botellas. Las imágenes y el vídeo de este artículo valen mucho más que 1000 palabras de descripción, por lo que seré breve en mi redacción. Pero en resumen, una herramienta de instalación especial se enrosca en la Rivnut y luego tira del inserto contra sí mismo mientras lo empujas contra el orificio. Esto hace que la carcasa exterior del Rivnut se deforme y se extienda detrás del agujero ciego, pellizcándola efectivamente en su lugar contra la pared de la lámina (en este caso, el tubo superior). Compré dos herramientas, en aras de la minuciosidad. La primera fue la herramienta Astro 1442: esta requiere operación con dos manos, desarrolla MUCHA fuerza de tracción, pero es un poco más complicada de configurar y usar. El segundo fue el Westward 5TUW4, que es una herramienta conveniente para una sola mano y muy fácil de configurar, pero desarrolla un poco menos de fuerza de tracción. En definitiva, prefiero el Oeste. Otra característica interesante es que viene con mandriles para M3, M4, M5 y M6 Rivnuts, un conjunto más útil para trabajos relacionados con bicicletas que los mandriles M5, M6 y M8 que vienen con el Astro.

Puede conseguir Rivnuts tanto en acero como en aluminio, y el material adecuado depende de la herramienta que esté utilizando. El Astro 1442 desarrolla MUCHO torque y es mejor para inserciones de acero: despojará fácilmente uno de aluminio. El Westward 5TUW4 realmente no desarrolla suficiente torque para deformar una tuerca Rivnut de acero (pude hacerlo, pero con mucho esfuerzo); esta herramienta funciona mejor con inserciones de aluminio, que puede deformar con facilidad. Afortunadamente, cada herramienta ya viene con un paquete inicial de Rivnuts, en el material adecuado para la herramienta. Y ese paquete de inicio incluye M5 Rivnuts, que es lo que necesitarás para este mod. Cualquiera de los materiales funcionará bien y no tendrá problemas para instalarlo en la pared de una bicicleta, ya sea de carbono o de otro tipo. En última instancia, prefiero ligeramente la herramienta Westward, pero cualquiera de ellas o cualquier alternativa similar funcionará bien.

Más allá de eso, la única información que realmente necesitas es cómo preparar tu bicicleta para la instalación. Básicamente, simplemente alinea el producto de almacenamiento del tubo superior previsto, marca dónde deben estar los salientes, perfora los orificios piloto y finalmente instala las tuercas Rivnuts. Está todo cubierto en el vídeo, así que asegúrate de verlo. La siguiente galería proporciona un poco más de detalle. ¡Disfrutar!


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