I have recently noticed a shake at "highway speeds" in my 2012 GS. It is still on the original tires with just 20,000Km. I am driving it much more this month as my Denali is under repair. Now I get this steering wheel shake and it is generally rough at Highway Speeds on the 400 series. I store it with the wheels on white styrofoam each winter . Is it time for a new set of tires? Are the tires just OLD?
What do you think?
What do you think?