A short segment on my local ride goes up 3 very tight - like 5mph max tight - switchbacks with short 5-10% grades in between. Top speed going up is like 42MPH. Not happening on any bike - or any vehicle for that matter. Top 10 is all above 30MPH - not happening either.
My best full gas effort - hitting the first leg at 30MPH (with a tailwind) and pushing over 500w was 44 seconds. The KOM is 18 seconds. No way, no how.