Just changed mine, tire fitter said they were a discontinued line at least 5 years ago they looked ok to me but once the tread gauge was used 2 out of the 4 were illegal and 1 barely legal which goes to show they may still look good but if they dont have wear markers its hard to tell on some A/Ts compared to car tires. He advised me to keep the best as spare and get rid of the original factory spare because although it looked new it had been sitting on the back for 14 years and would be unreliable by now because of its age.
Now I need to clean the ally part of the Graphite Ecco,s up where all the weights were, My new tires only needed one small weight each. seems like PO had second hand tires put on at some stage unless he went for a re balance a few times?
With stock its easy to buy second hand cheap as just about everyone goes to 31,s or 35,s as soon as they get a TJ, personally I have never put second hand tires on any vehicle, twice when I was a lot younger I had to take out finance to have new tires lol