What will / won't rub

[Mr Anderson]

Yes E rated tires are much stiffer than lower load ratings, it is because of the number of plys in the tire. E rated tires have like 10 plys alternating rubber and polyester. Also more plys in the sidewall. As you go down in load rating you have fewer plys. You can run up to 80 psi in E rated tires maximum load rating. Usually 35 or 44 is max on regular tires. Thats the difference between P and LT tires (passenger ie. car and LT light truck.) Regular car tire only have 3 plys. Now flexibility also depends on if they are Radial or Bias ply tires. You can run much lower pressure on Bias ply tires because they are more flexible and can handle the folding and crinklin at low pressure. Radial tires just fall apart internally usually so they look ok from the outside but are entirely disintigrated on the inside. So that is why your big super swampers are E rated because they are 10 ply, even though no one will ever run them anywhere near 80 psi, you could.