Quote:
Originally Posted by bestmapman
Surely you would agree that the tire manufacturer not the car manufacturer knows best about how the tire will hold up and what tire pressure is allowable.
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Not necessarily. Car manufacturers spend a LOT of time testing every imaginable tire on any car they build until they find what they feel works best. Tire manufacturers are building tires to be used on a wide range of vehicles. How could a tire manufacturer put a recommended pressure on a tire without knowing what type of vehicle it is going to be used on? That's why they only list the maximum pressure, since they can be relatively sure that pressure above that would lead to failure on just about any vehicle.