2010 Ford Platinum _tires need replacing @ 36k
 

Hi ,
These tires are Pirelli Scorpion ATR 275/55-20
Tires have been rotated every 5k and are worn out on the outside
Is there anything I can do to help prevent this? $1200 for a set of tires and only getting 36k is not a good average in my opinion.
thanks

One thing that jumps right to the front of my mind is CHECK THE ALIGNMENT! Seems like too much toe-in will cause this, or possibly a touch up on the camber, as well.

Taking turns at high speeds will also take the outer edges off quicker.