Mixing in new tires with worn tires?
When replacing two new tires instead of four, be sure that your new tires are the same size and tire type as your current tires, and that your dealer always installs the new tires on the rear axle of your vehicle.
For continued optimized vehicle performance, it is recommended that all tires be replaced at the same time with identical MSPN.
Deeper tread tires on the rear axle provide better handling, wet grip, and evacuate water, thereby helping to avoid oversteer and loss of vehicle stability on wet surfaces. Deeper tread tires on the front axle can improve wet straight line braking and stopping distance. If only two tires are being replaced, Michelin generally recommends they be installed on the rear axle in the absence of a tire service professional's recommendation or consumer's preference to the contrary.
Replacing a single tire on a vehicle can have an adverse effect on suspension systems, gear ratios, transmissions, and tire treadwear. If a single tire replacement is unavoidable, it is recommended that the single new tire be paired with the deepest tread tire from the vehicle (including the full size spare) and both be placed as a pair according to the recommendations in the paragraph immediately above.
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