2010 Chevrolet HHR Owner's Manual - Page 357

WARNING: (Continued) . Low-Profile Performance Tire If your vehicle has P225/45R18 size tires, they are classified as low‐profile performance tires. These tires are designed for very responsive driving on wet or dry pavement. You may also notice more road noise with low‐profile performance tires and that they tend to wear faster. Notice: If the vehicle has low‐profile tires, they Underinflated tires pose the same danger as overloaded tires. The resulting accident could cause serious injury. Check all tires frequently to maintain the recommended pressure. Tire pressure should be checked when your vehicle's tires are cold. See Inflation - Tire Pressure on page 6‑63. Overinflated tires are more likely to be cut, punctured, or broken by a sudden impact - such as when you hit a pothole. Keep tires at the recommended pressure. Worn, old tires can cause accidents. If the tire's tread is badly worn, or if your vehicle's tires have been damaged, replace them. . . are more susceptible to damage from road hazards or curb impact than standard profile tires. Tire and/or wheel assembly damage can occur when coming into contact with road hazards like, potholes, or sharp edged objects, or when sliding into a curb. The vehicle warranty does not cover this type of damage. Keep tires set to the correct inflation pressure and, when possible avoid contact with curbs, potholes, and other road hazards. 6-55