2015 GT with Outside tire Wear. I asked about this last winter and after speaking with several on here found that the tires were toed in at the front by 1/4 inch.using string method. I readjusted toe to 1/16 inch toed in at front each side. Tire is a 255-35-20 Cooper AS3. Tire had about 1/2 of tread left until this weekend. went on a 650 mile trip and it took them down to nothing. Below wear bar all the way across tire. Both tires Identical. Tire Pressure was between 27 and 28 PSI. Of Course, I am getting 2 new front tires and an alignment but what am I missing here to cause this? Thanks