How many miles do you get out of your good tires?

last 5er was 12k across 2 axles; we had the original 10 year old tires on it. ~30k miles on the tires and they were not even close to the wear bars when we traded

the TH is of similar weights to the OP; we have less then 10k miles on it now and the tires aren't showing any noticeable signs of wear

both of our 5er's have always been inside on concrete unless they are being used; helps a ton in regards to being checked and side walls rotted