Out of curiosity I measured my LTX MS2's last night. 9 to 10 32's left. Fronts have 10, rears have 9; I think the rear tires have 1k more miles than the front; 9 to 10kmiles (need to check records, but one pair was replaced due to balance issues shortly after purchase). I went to look up P255/70R18's on tirerack but my size does not show tread depth. Should I presume 12 to 13 is the fresh size? For reference, I also measured the tires I just put on my Camry, which have less than 2k on them; I measured 10/32's. Tirerack says it should have had 11/32's so my cheapo Slime tread depth gauge may read 1/32 low -- which I'm not shocked at, and makes me want to measure tires when they go on, for proper tire wear monitoring.