Yup, not the correct load rating, BUT, I confess, I am running a set
of these, studded, right now.
First, I have to say that I have never used a  better tire than this
in the snow and ice.  What I have found is that a lot of these tires
are really good the first season. After the first, the rubber hardens
and they are noticeably less effective in the snow and ice. Also,
these are great in deep snow.
On another of my vans, I am running the Hakkas, and they are the only
tire that compares. Not a fair comparison though, because my
Winterforce tires are studded.
Secondly, they wear great. This is the third season on my Winterforce
tires.....and I never took them off. I can't say, however, what the
total miles are, because the odometer quit working, of course. Also,
this is on my seasonal Syncro, which doesn't see the use in the
summer, that it gets in the winter, but, if this is their third
winter, that's pretty good.  Some of the studs are gone now, but they
have good tread for this winter.
Disclaimer......I am not recommending anyone use tires that are not
correctly rated. I am saying that I used these in a stripped down
Syncro, that was never loaded with more than Isabel, my dog, and her
master, moi........
Good Luck,
Miguel