Originally Posted by
BikePower
why do racers you high pressure tires 120ps? Why does it feel harder to pedal when I have low air pressure? Why do I get much less mpg fuel economy on my truck when I dont keep the tires inflated to the correct pressure? Im very interested if you can bust this misconception that I have. Thanks.
Racers don't use 120psi. Too low will be harder to pedal, the
proper pressure is not too hard nor too soft. Your truck has suspension and doesn't need the somewhat lower pressures that a bicycle does. Apples and bacon comparison. Your misconception is busted by physics, not by me. A tire needs to be soft enough that it can conform to the texture of the terrain it is being used on. This increases traction and decreases rolling resistance. This was 'discovered' years ago and as tire sizes have increased pressures have decreased. I would go so far as to say that there is not a single pro road racer using 120psi these days.