New 2020 1500 CCMB Laramie, the factory Bridgestones ride nice but when towing my tall enclosed cargo trailer I believe the soft sidewalls are contributing to a nasty side to side sway in the rear end. Looking at going to D or E but worried about stiff ride. Could run them at lower pressure when not towing, but hoping someone has been there done that and has input. Not much available in the stock 275/55/20 size in D range, more in XL. Would have to go 265/60/20 to get E range, only slightly taller I doubt it would make much difference. Can get General Grabber ATX in stock size but worried about noise. The 265 size opens up about everything but all in E range.