1 of four tires is about 1/32" from wear bar, mfg 2011. The other 3 are 1/4" from wear bar, mfg 2012. It has part-time 4x4 (for loose surfaces only) which is almost never used and driven 8k miles/yr.
Change just 2 tires and get 2 more years from other 2?
Krgds, -frugal.

it would mess with the 4 by 4 if you use it a lot not changing all 4