from, my experience, load Range E has been a great choice....like you i was concerned...fortunately my experience has been very positive. I drive a 2020 Max FX4 with Ready Lift 3/2. level. OEM 18" FX4 Rims. From day one of delivery, I ran Nitto Ridge Grappler 305/60/R18 for 30k miles until i got tired of the noise, the drifting and the dangerous handling/slipping on rainy roads. Currently running Cooper Discoverer AT XLT 305 65 R18. This is an E load tire. I run them at 38 PSI. No bag, no drift, quiet, & smooth. Can air them way up when i want to tow 7500 travel trailer. I too was concerned about a harsh ride, but this has not been the case whatsoever...the ride has improved and I'm glad i did it. I think the extra plies add some needed support that P tires lack, especially with the larger tires on the 18" rims and lower psi. I spend a good amount of time on the highway between sandy farms and citrus groves here in Florida as well as some long-distance runs north...the grapplers were great off-road and looked cool, but miserable on the road esp after some mileage. The Cooper Discoverer AT XLT Loa Range E has been a great pairing for the last 5000k miles thus far.