[dunebuggy73]

I feel like 12000 miles is premature for that kind of tire wear but I would recommend a more frequent tire rotation for the next set. I would say at least every 5000 do a rotate and balance. Some would say it is wasted money but I will tell you from my experience that after 5000 miles I put my camry hybrid's tires on the balance machine without removing the old weights and they were out of balance. This rotation and balance is critical to the lengthening the life of your tires. A little less aggressiveness might help too.