Transcontinental Race No. 8 - TCR8 - #TCRN08 - 2022

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As someone who's always enjoyed following ultra distance races but never took part in anything more than a shorter-type audax, is the feeling that using very specific but potentially less "standard"/easy to fix and bodge equipment like deep rim wheels and latex tubes or even di2 over mechanical is worth the improvement in performance? Or simply a case of "nobody knows and everyone will do whatever makes them feel better about their equipment?".

I'd have guessed that the marginal savings wouldn't be worth the ease of repair or even comfort would trump sheer performance in the context of an ultra race, but maybe that's the case of people aiming to reach the finishers' party and less so at the pointy end of things?