I have 4 Goodyear Wrangler SR-A's, size P275/65R18.  These are take-offs from a late model F-150, and they are all in pretty good shape.  The worst one has about 4/32's tread, but 2 have about 8-9/32's and one has 10/32's tread.  When they are brand new they have 13/32's tread, so you can see these still have plenty of good in them.  New these are $200 each from Wal-mart.  These tires are great on pavement, excellent ride and really quiet.  I just moved out to the country and they couldn't handle the gravel, but this is a superb tire for on the highway.

Check out Goodyear's page for more info:  https://www.goodyear.com/en-US/tires/wrangler-sr-a?step1=275&step2=65&step3=18&addr=Salina%2C+KS+67401%2C+USA&lat=38.8619254&lng=-97.654811&cta=undefined