Hunter, the rating of the stock load range E Michelin is 3,195 #.
The Dueller are labeled P (for passenger) instead of LT, and rated 2,535#. I very seldom carry heavy stuff during winter time so they will suit my needs, may not suit yours.
I also have a SRW, I don't know if a P tire can be mounted on a dually.
I personally don't like ''all-seasons'' tires because they do a correct job every time, but never an exceptional job. And I hate being stuck or have to be towed during winter, I'm too proud for that

. Pride has a price, and mine is slightly under $1k USD for the 4 tires, rims and installation.
And I always carry my Sorrel boots, just in case (Cannuck's inside joke).
Hope this help! Dan