It depends on your preference. A majority of the drivers install tire chains on the tractions wheels. If it is a regular passenger car, you only need to install two chains. Some drivers prefer 4 chains on their regular vehicle for better traction. That’s a good idea, but it isn’t necessary.   SUV and sports car, on the other hand, need 2 pairs of snow chains. This means you will need to put 4 chains to cover every traction wheel.