Are my Asymmetric Tires Running Backwards?

It's very common for a customer to get very excited over the tread pattern of their newly purchased asymmetric tires. While I agree the look of the grooves would lead you to have them pointing in a downward direction during rotation, the reality is there isn't a significant enough of difference for it to matter.

With an asymmetric design you need the larger shoulder block on the outside to take the abuse during cornering, this is more important than the direction of the groove on the inboard shoulder for water evacuation. The groove channels are small enough that the water will escape to the circumferential grooves when under speed. There's an unbelievable amount of force being exerted on the tire when the leading edge hits the road. Water is going to move through those lateral grooves out to the circumferential grooves for evacuation due to the force being exerted. Those grooves must also have an angle to them. While they would work just as well if they were perpendicular to the larger circumferential grooves, the tire would be very loud. By introducing an angle, noise levels are lowered.

Testing data and feedback on the tire is based on them mounted with the outside marking facing outside. The tire will perform as intended when installed in this manner. There's no left side and right design available. The fact remains, the engineers designing these tires are achieving the performance goals with this design. You'll see this on tires from all brands using an asymmetric approach.

Listed below are some of the more popular and highly rated tires with an asymmetric design.