Oh heck, didn’t even open ‘em. Enter in 180lb male, 90lb bicycle, a crapload of hills. I can't find a calculator with a 4 mph input. Ya, yours cuts off at 40, Spandex Dweeb....
"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744
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