Ok cool, those are SL 33” tires?There aren’t non E load in your 275/70/18. Justaron and I are running 17” wheels 285/70/17.
If I moved back to 18” tires I’d probably try the new Toyo at3 EV’s in SL load at 43lbs each. Suppose to be every bit as good as the regular Toyo at3 but less rolling resistance.