Replacing Two Tires 

Whenever a pair of replacement tires is selected with the same size and construction as those on the vehicle, the two newer tires should be installed on the rear axle. This is because the deeper tread of the new tires will grip and evacuate water more effectively than the two tires left on the on the vehicle. This practice is extremely important for maintaining adequate traction, especially when the driver encounters hydroplaning conditions. Improved traction on the rear axle can prevent an over-steer condition or loss of vehicle stability on wet surfaces.

©2003 Tire Industry Association