I’ve had similar weird wandering after swapping tires, and dropping a couple PSI usually calmed things down. Those Nittos can feel extra sensitive to grooves, so I’d try low‑mid 30s and see if the steering settles a bit. I’ve dealt with that kind of quirk on my truck too, and sorting pressures made a big difference there as well, especially after buying heavy‑duty tires from https://pneusquebec.net/pneus-camions-lourds/.