Texas,
My coach has 16" wheels and E-rated tires. They weigh about 80# each. If needed, I do have the jack and wrench to change one out.
I will suggest that you carry that essential kit if you plan to travel other than the blue roads. Thrice I have had to deal with a tire on the road. Of those times, twice the road service truck did not have either a jack that could get under (out coach is very low) or a wrench that could deal with the lugnuts. As I did have both, we were able to effect the required service and go on our way.
Matt