A snow tire does not prevent tires slipping on ice. Snow tires work best when installed in sets of four, if you are only installing two snow tires on a front wheel drive vehicle they should be installed on the back of the vehicle. While this may sound ridiculous the Tire Industry Association (TIA) advises that if you install 2 snow tires on the front of a front wheel drive car and all season tires on the back, the back tires may slip causing a loss of vehicle control. The best solution for this is to install four snow tires on your vehicle.