Its excessive toe.

Zero out the toe on your next alignment, and be sure your rear suspension components are in good shape. the wishbone control arm and lower ball joint are the biggest culprits in the rear which allows the alignment to go out.

Either way 50k is good for a set of meats, what size wheels/tires do you run? You're in CT so are you running winter tires too or are those year round meats?

I have Toyo Proxes STII year round on my staggered 20" 168's, they work great for me in the Jerz, aren't too pricey, those definitely don't look like 315's though so you may be able to get a decently affordable set.

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards