When the tires on your car do not have enough air, they can create a rougher ride while you are driving. However, your underinflated tires can also cost you money.
When your tires are underinflated, the edges of the sidewalls come into contact with the pavement. Since there is no tread on the sidewalls, these areas wear down more quickly, requiring you to buy tires more often.
However, replacing worn out tires is not the only extra expense underinflation causes. When your tires do not have enough air, they drag on the road. This dragging makes your engine work harder…