The fact about tyre pressure
Most car owners feel that the bigger the car the more pressure the tyre needs. They feel if you fill lets say a 35psi on a Honda accord then you should fill a 45psi on an ML 500, because the ML's tyre is bigger. It is not always this way.
Let's take for instance, you have 50,000 molecules of air in a room, and we transfer this 50,000 molecules into a ball. what do you think will happen, the ball will actually have more pressure than the room. The reason being that pressure is dependent on the amount of molecules bombarding the walls of the container.
Pressure= Force/ area
So the larger the area the bigger the force/ air molecules needed to maintain the same pressure. Therefore 35psi in a 265/65R17 will give out more air molecules than same pressure in a 195/65R15.
So it is wrong practice to put more air than required.
Let's take for instance, you have 50,000 molecules of air in a room, and we transfer this 50,000 molecules into a ball. what do you think will happen, the ball will actually have more pressure than the room. The reason being that pressure is dependent on the amount of molecules bombarding the walls of the container.
Pressure= Force/ area
So the larger the area the bigger the force/ air molecules needed to maintain the same pressure. Therefore 35psi in a 265/65R17 will give out more air molecules than same pressure in a 195/65R15.
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