I have a set of ST Maxx 255/85-16's on my heavy fully armored 2012 Frontier (Shrockworks skids plates, front/rear bumpers, sliders, 8K warn winch, topper, etc.).
Tread depth new is 18.5/32”, after 15,000 miles (rotating 4 at a time) they are at 8/32”, so I've used about .02”...