Traditionally, I rotate my tires by crossing the front tires to the rear, and shooting the rear tires straight to the front. Balancing occurs every 5k miles. Although, I was getting my tires (re)balance due to some bouncing on the freeway. Comes to my service advisor's attention, that my tires are reaching about 4/32 to 3/32 of treadwear left. I have almost 24k miles right now. Is this normal for tires to last that short of time? What have you all driven w/ the stock tires? If replaced, what do you suggest/recommend?