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I have the Goodyears on my TTS and run the comfort pressure settings (partial load) that's in the owners manual; 30 (front) & 35 (rear). Anything more it's too bumpy and unsettling over bumps. My car has sport suspension option which may affect it differently. In warmer weather (spring/summer) when I plan to drive aggressively on the back roads I drop them even more and keep about a 3 psi split between front and rears; start with 27 front and 30 rear since they heat up quite a bit and gain pressure.