If you decide to replace only two tires in your car, the new tires may have a deeper pattern depth than the old tires that have not been replaced. It is generally permissible to mix tires of different pattern depths on non-coaxial.
The tire industry recommends that new tires should be mounted on the rear axle.
It is generally recommended to install high-grip tires on the rear axle to prevent oversteering and loss of running stability on slippery surfaces. Some car manufacturers recommend installing the latest tires on the front axle. Consult the car manufacturer and/or tire specialist for more information.
Some vehicles may be shipped with different sizes of tires on the front and rear axles. For these manufacturers' approved tire mixes, it is recommended that you follow the car manufacturer's recommendations.