Are they directional? Look at the difference in the tread between these two pics. The center tread on one tire just has horizonal slots, and on the other it has horizontal and vertical. I have 2 of each tire. I'm not sure how they go on the car.

 

the tires are marked outside

 

Where are they marked? What should I be looking for? Thanks

 

All four of mine have the vertical slots.

 

IF they are directional there will be a long arrow pointing in the direction they go