I got a set of these Sun F 12 ply runflats, they are nearly 40 pounds EACH! (I weighed them without rim). The size is 26x11x12 (back) and 26x9x12 (front)

Are these ok to run on my Grizzly 450? I need flat proof tires for a specific trip I am doing… What, if any issues could these tires cause? These tires are super tough and will run without any air at all without deforming.

I am only doing 10 miles and hour max on these tires.

Thanks