The official "my Yaris handles bad on the highway/with crosswinds" thread

[blacksan]

Originally Posted by grampi

Good article, but it doesn't specify exactly what is considered overinflated. If you ask around, I think you'll find most tire experts will say a tire isn't overinflated unless the max pressure listed on the tire's sidewall is exceeded. As long as you stay under that, you're fine. BTW, for what it's worth, driving on underinflated tires posses a much higher risk of a blowout than does driving on overinflated tires. Remember the Ford/Firestone debacle a few years back? Almost all of those accidents were attributed to underinflated tires.

Unless the tire is specifically made for the car it is mounted on then the max printed sidewall inflation holds no relevance what so ever. Open your vehicle manual, or study the info plate that gives you a recommended inflation based on GVW for that particular vehicle. "Tire Experts" did not design the vehicle. The engineers that are employed by the manufacture do, and know the correct operating perimeters for said vehicle.