our 2016 Montana HC came with 235/80R/16 ST Load range E from Keystone and the dry weight is 9880 Lbs Pay load is 3615 which equals 13495 max gross is 13500 LBS so as you see a 10 PLY is big enough an they are going to be 6 yrs old in may an Iwill be changing the to a 235/80R/16 LOAD Range G 14 PLY cuz I want a tire with more plys so as my max weight pre tire will go up an it will have thicker ply side walls cuz if I keep the 10 ply on they will be greater chance of blowing out, so to prevent that I am going to a 14 ply tire an i will feel better. an I have 2003 dodge 2500 ram 5.9 cumins diesel wiht a Edge programmer an it does a outstanding job pulling at 65to75 miles an hour .
