3/2/15 I did a post on my blog just on the Michelin LTX and the confusion caused when Michelin intentionally / unintentionally selected a tire name with "LT" in it and included P type and LT type in the size line-up.
The confusion is compounded when people don't include all the information that I consider part of the size description. That being the preceding type letter i.e P or LT or ST and they also do not include the Load Range info stated on the sidewall. i.e. blank = Standard Load or LR-B
XL for Extra load on a P type tire or LR-C or LR-D etc for LT type tires.
It also appears that Michelin recently changed their web page as in the past there were over 40 different LTX tires. Some were Passenger and some were LT
If you go to TireRack
and click on sizes you can see they have many