Your Yokohamas are designed to drive you into the future. But if they are overinflated or underinflated, they could wear down more quickly. Check your pressure once a month when the tire is cold and set it to the manufacturer’s recommended tire pressure (see placard inside of driver side car door or your owner’s manual).
Proper inflation doesn’t just protect your Yokohamas from wear, it also helps you get better gas mileage. If they’re underinflated, your vehicle uses more fuel.