OEM set lasted 17.6k for me. Second set is at 19k with probably another 5-8k left. Two things I did between set 1 and set 2: I got an alignment with my local tire store at "A-P low" setting which I drive all of the time. Alignment guy said that I need to be aware that the suspension geometry changes with ride height which skews alignment. (My R1T was seriously out of alignment from the factory which affected OEM tire life.) Secondly, I use conserve for long interstate trips but always at the Low setting and never at the Lowest to maintain the alignment geometry. Just drove 2400 miles round trip at 90% conserve at posted speed limit + 10 and averaged almost 2.5 on the Richter scale.Just out of curiosity what is the highest mileage you have seen prior to replacing your 21” tires.
Wow. Same exact specs except I haven't changed mine. Bought in Dec 22, 30k miles, I might have a couple K left. Already bought the replacements just waiting for the fronts to wear down a bit.Just changed mine end of June and had 31k and it was all mainly around town and a handful of trips up to TN and one down to Morgan city LA.
Have had my R1T since Dec 22.
Currently in for its first check up.