I have a year on my ST Maxx's and about 16,000 miles and been very pleased with them so far. I replaced a set of AT/3's that were pushing 50,000 miles but with a White Rim trip and a Toroweap visit going on decided I wanted to be on the front side of the tread curve rather than the backend.
The ST Maxx's are noisier than the AT/3 and heavier but really haven't noticed a significant mpg hit. I like having a three layer sidewall and I do air them down to around 30 pounds or so when I'm going to be running on dirt, could no doubt lower them further but so far haven't felt the need. On the highway I run them at about 65psi all the way around.
HTH.
The ST Maxx's are noisier than the AT/3 and heavier but really haven't noticed a significant mpg hit. I like having a three layer sidewall and I do air them down to around 30 pounds or so when I'm going to be running on dirt, could no doubt lower them further but so far haven't felt the need. On the highway I run them at about 65psi all the way around.
HTH.