If the tires are unidirectional they should be mounted in the right direction. Their performance will be compromised otherwise.
If unidirectional there should be an arrow molded in the sidewall to show which direction the tire should rotate when the vehicle is moving forward. Or the there might be "THIS SIDE OUT" molded in the sidewall.
If unidirectional there should be an arrow molded in the sidewall to show which direction the tire should rotate when the vehicle is moving forward. Or the there might be "THIS SIDE OUT" molded in the sidewall.