Cause my car tires take 30 PSI and my bike tores take about 40-65 PSI? What is this all about?? Car tires are bigger than bike tires!
P.S.I. stands for pounds per square inch. since there are four tires on a car instead of two and those tires are larger there is more surface area. therefore more pounds of pressure overall. since the motorcycle tires have less surface area, more psi is needed for the same amount of pressure, and proper ride
bike tires are thin and made of weak construction so they require a tube and high psi my bike tires take 115 psi most cars take 35 and big trucks take 80 and up
Pressure and volume are two different things, junior. The tires on your car are designed to flex so that they can absorb impact, and also so that they flatten out a bit and you have a contact patch. If your car's tires were inflated to 90 pounds like a bike, they would be hard as rocks and perfectly round with no flex and a microscopic contact patch, just like your bike, which would be extraordinarily dangerous because you would have very little traction. However, if your bike's tires were inflated to 35 PSI, they would be so soft and flexible it would feel like you were trying to ride your bike through molasses. The volume of air in a bike tire is extremely small compared to that of a car, but the pressure is much higher in order to minimize rolling resistance, which is one of efficiency's biggest enemies. If you could switch and put four bike tires on your car and two car tires on your bike, you would realize very quickly why the designers of cars and bikes use the tires they do.
