HossAg said:

IS350 has staggered wheels and eats up tires with the inner tire wear issue. Nothing that can be done about it. If you're any kind of spirited driver, expect front tires to last about 15-20K miles at the most. Mine lasted less than that.
A competent mechanic with one of those Hunter machines can make the adjustment to minimize the issue. I had similar issue with the original IS300 where the factory toe was too aggressive that would eat up the inner tires prematurely and my mechanic at the time took care of it while the dealer was like 'it's by design for this sports car' when the car was still under warranty.....