Have a 2010 2WD TRD. 40,000+ miles with a 2.5 inch lift on the front. Rugged Trails are just now starting to show a little wear on the edges. Sounds like ya'll are cornering to fast or not rotating enough. I would bet the main problem is low air pressure. I run just shy of 42lbs front and 38lbs rear. Also once they start wearing they will keep wearing.