I'm currently at 47,870 miles, all highway.
The tires came standard on my new purchase. 2023 RAM 2500 Heavy Duty Mega Cab. I've trailered a midsized SUV from New England to Texas with no problems. Also drove to climates that are consistently in the -20°to-40° range. As well as the heat of Texas. Haven't had any issues. Still plenty of tread left. I just searched to find out tread life and if I should consider replacing now. From the other reviews, seems like there's no consistency.