It looks like 45.6 lbs for the KO2s in stock size which is a big difference from what you have for the Duellers. I took about a 2mpg hit when I put them on. They are great in mud and snow but awful in the rain after 25k.
I have a 2015 Trail with no mods and the stock size BFG K03s on it. I'm getting around 15-16 around town and probably 19 on the highway. I don't think it ever got the advertised 21 mpg highway.
