I've had a set in 235/85R16 for just under 2 years and about 25k miles. They're at 50% tread depth left. This is on a pickup that weighs about 6500lbs most of the time, with occasional runs close to 7k or as light as 5k. On road I run 40-50psi, off road 18-22psi. I usually aim to cruise highways at 70mph, but frequently more like 80mph. The rear axle is locked, and the front end is a Ford ttb, both tend to accelerate tire wear. They're great tires. I've been pretty rough on them off road, and very minimal tread damage with no side wall issues. They're not great in mud, but everywhere else I'm more than happy.