How does this affect the rolling circumference? Factory spec is 33/29, when my tire pressure is off I notice a slight rumble strip effect at high speeds, feels like the front and rear are fighting eachother. I figured it was the speed sensors showing a difference in speed front to rear due to the different rolling circumference caused by low tire pressure. This is my warning that the tires are getting low. It goes away instantly when I air them back up to specs.