What does the term unidirectional tread mean with regards to a tire?
Unidirectional tread has all of the main grooves in the tire facing in a single direction. The theory is, more water can be channeled from under the tire tread, on a wet road. A standard bidirectional tread has grooves facing in both directions. Care must be taken in mounting the unidirectional tire. The treads must face the proper direction in order to work and the direction is normally labeled on the sidewall of the tire.
