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Testo: <blockquote data-quote="robeambro" data-source="post: 6435077" data-attributes="member: 113143">Ah, allora se un aereo e' piu' vecchio di due anni magari flette come un Rio Mare col grissino, ho capito. La prossima volta che volo, per sicurezza chiedo al pilota se l'aereo e' nuovo.. (ecchecchacchio m.buti ora ho visto che hai scritto la stessa cosa <img src="/forum/styles/uix/xenforo/smilies_vb/icon_mrgreen.gif"  class="smilie" loading="lazy" alt=":mrgreen:" title="Icon Mrgreen    :mrgreen:" data-shortname=":mrgreen:" /> )Giusto perche' sono buono, mi limito a citare una fonte dove si spiega che non e' assolutamente una cosa rilevante, e che preferire un telaio nuovo ad uno vecchio di due anni "perche' vuoi mettere, e' piu' rigido", e' una cazzata."While carbon fibre composites have a high strength to weight ratio, they are highly susceptible to high loads over a small area, such as an impact. Once the integrity of the composite is compromised, the matrix essentially starts to crumble and must be repaired or replaced.In the absence of any impact, the matrix can deteriorate with use, but it takes an extremely long time. “The epoxy matrix will at some point start to form little cracks,” explained Chuck Texiera, “and then over time it will just have the connectivity of the fibre. So really what’s happening, over really extended periods of time, you can expect the stiffness of the frame to change ever so slightly but it’s such a small number. We can measure it but I really wouldn’t think it would be perceivable. But it takes hundreds of thousands of cycles to even get to that. Two years would be far too short for that to occur with any kind of typical age group racer.”<a href="https://cyclingtips.com/2015/08/what-is-the-lifespan-of-a-carbon-frame/" target="_blank">https://cyclingtips.com/2015/08/what-is-the-lifespan-of-a-carbon-frame/</a></blockquote>

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