Hey everyone - first post on the forum after lurking for several months...
I love this look and made this change to my 2026 Premium. GX 550 OT wheels with 275/70/18 Toyo AT3's in
E Load Rating. Prior to the Toyo's, I had actually tried the Falken AT4W's in the same size and same load rating. I ended up swapping to the Toyo's as I thought the reduced weight would improve handling.
I've had the car aligned, tires balanced, re-balanced, road-force balanced, and match mounted and the handling is garbage and it's driving me nuts! I've also experimented with both 36 PSI and 42 Psi cold pressure. Despite all of this, I'm seeing:
- Constant drift requiring persistent counter-steer correction (both directions, not consistently one-sided)
- Tramlining and left-right hunting on grooved pavement
- A generally unsettled, exhausting highway feel — not harsh, just never planted
- Crown sensitivity and an "ice skating"-type sensation at highway speed
- With Lane Keep Assist engaged on a straight road, the vehicle makes constant, dizzying left-right microcorrections
I'm wondering if anyone else is having a similar issue? Aside from wheels, tires, Slee Skids, and Slee sliders, the vehicle is bone stock. I'm wondering if they maybe missed something during PDI? It almost feels like some sort of calibration (EPS, traction control, etc.) is off...
Any ideas from this brilliant group? Photo & alignment report attached,.