Quote:
Originally Posted by cbaber
Did you not read the whole point of this thread? Going from the factory spec of 30 PSI to the maximum sidewall pressure of 45 PSI I gained 7%. That is my own personal experience and many, many, many others have had the same result or even better. That isn't even over inflating, so there is still more to gain if I decide to over inflate the tires.
Clearly, your conversation with Marvin confirmed the fact that center wear on radial tires because of high pressures is a myth. But the vibration issue really struck me as odd. Tire/wheel vibrations happen when tires are not properly balanced. I don't see how increased pressure would create a vibration, unless the quality of the tire allowed it to deform under stress. Now, the entire point of the thread was to discuss if over inflating beyond the indicated sidewall pressure could have these results.
If you have a tire that deforms at 60 PSI, it's probably the worst quality tire in the world. As many have advised me in this thread already, modern tires are capable of handling more than their indicated max pressure.
|
No, you missed the point. First, the max presssure is not the reference for overinflating; it is the owner's manual or the door sticker for the car. 2-4 psi increase can be used for heavier loads, but not more. The tire manufacturer's max is for the buyer to know if it fits within the auto manufacturer's specs. We must not use the tire max as a reference for what is good for the car. Your tire pressure is way overinflated for the vehicle design.
Second, center wear on overinflation is not a myth. It is just not as big a deal as with bias tires.
Third, vibration happens all the time in a moving automobile. It happens from imbalanced parts, such as in a worn engine or drive shafts that become unbalanced. Tires/wheels that are not properly balanced can also contribute significantly. All these sources shorten the cars life. But overinflated tires will exceed the design parameters of the springs and suspension parts, and that causes much more vibration that was never intended by the manufacturer.
Fourth, a tire must never, ever be inflated more than the maximum rating of the tire in any application.