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What happens if a tire is underinflated?
In engineering terms, underinflation reduces a tire’s effectiveness by preventing it from operating within its design specifications. That means underinflated tires . . .
Increase tire deflection, which increases heat buildup and “rolling resistance.” Tire deflection is the flexing of the tire tread and sidewalls where the tread touches the road.
Reduce mileage by up to 5 percent
Reduce tread life by as much as 25 percent—or about 10 percent for every 10 percent of under inflation.
Weaken tire structure resulting in blow-outs or other failures.
Reduce steering responsiveness and stability while cornering.
“Break traction” more easily, which can affect handling.
Affect weight distribution and in turn steering, alignment, braking and may cause your vehicle to “pull” one way or the other.