guys, i tried to do some research, hth

taken from toyo tires website

Sometimes tires cannot be rotated according to popular patterns. Such tires include uni-directional tires with asymmetric tread designs.

this is taken from a website more on motorcycles pero pareha lang naman.


There are now two main reasons for directional arrows. The first being that some motorcycle tires now have tread patterns that are designed for a specific rotation for optimum performance, particularly on wet roads. Directional arrows indicate proper directional rotation. Secondly, running a tire will set up a wear pattern that may cause ride disturbance if reversed. The directional arrow insures that a tire can be re-fitted in the original direction.