I notice lately on the highway @ 65+ mph, my 07 outtie tends to pull on both sides. If I stay below 65, I have control and is normal. Could it be the tires?

I know road conditions play a role too but still. I have the Yoko AVID TRZ about 20k on those tires.

 

I do not understand "puling on both sides". If you are trying to describe a wandering, it could be tires or ball joints and struts on the front. Pulling would be an indication of a brake caliper frozen and brakes dragging on one side.