Grand prix. Got 3 used altimax tires at 60% tread. Got 1 more identical tire from shop and it also has same tread depth. Drove 5k miles? Now, 1 of the tires, not sure which is at 25% tread. Nice evn wear. Other 3 show almost no wear. I thought my eyes were playing tricks. How can 1 tire wear so much? I would expect even wear from all 4 tires. Yes worn tire is on front but other front tire looks fine.