My 96 trep has 125K on the original rear goodyear eagle GA tires. I have 7/32 tread left. I think they had 11/32 when new and the minimum is 4/32. I tried rotating them to the front this winter for 1 week and put them back. they had lousy traction. must be hard after 7 years. I am getting new tires this fall. they have nice even wear and they feel good on fast corners. I used to drive cars with lousy, mismatched tires and never realized how much better the car handled with good tires. its the only thing between you and the road.