I had a pair on the rear for about 10K and used them till they were smooth. The fronts still looked good so I splurged for another set for the rear. This time I got a full balance at the stealership and they noticed my ride hieght was a little low on one side. They corrected everything for $200 and I can tell they are wearing a little better. Still after 5K i already wore through only layer (outside notch on Tire) and figure I have about 8k left. My fronts are 15K in and they have more tread then my rears with only 5k!! Its crazy how fast they wear out. I will admit they are best looking tire for the 4.6 in my opinion!!!!