I have Maxxis ST tires on my triple axle TH. I chose them only because I understand that they have the best user rating for ALL ST tires currently available, and its the only brand not made in China. I dont have too many miles on them but I'm only hoping that they last.....or at least dont fall apart on the road. After all the research, I certainly would like to have been able to change over to 16" LT tires but the cost to swap out all six rims and tires was extensive, and LT tires are more expensive than ST tires. If I remember right, it would have been around $3000 for a complete swap to 16" LT tires. I had to weigh the costs and chose to go with the 15" ST E rated tires. Also, I'm really glad to hear your news on the TPMS. I think its a worthy investment. Question though, how easy is it to install? Do you have to de-mount the tires?