Quote:
Originally Posted by GatorLapis
Well, generally speaking If a car is understeering, it means the car turns less into the corner than it should for the steering input. So obviously, the rear tires, which want to go straight have more grip than the front tires which are trying to turn. To solve this problem we can increase the contact patch of the tires that need more help. That means lower pressures on the front, or we can decrease the contact patch size on the tires that have too much grip, so increase rear pressures.
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That isn't always the case. Generally speaking, higher air pressure will increase the contact patch, as the tire doesn't roll over as much on the rim with more psi. But you will reach a point of diminishing returns.
Of course, it all depends on the tire, the car, the alignment, and so on. But for most cars, higher tire pressures = more grip.
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