Originally Posted by TiAgX5

A little bit?????? The stock 20" rear tire for the E53 is a 315-35-20, 28.7" diameter, 726 revs per mile. Yours are 30.7" diameter, 677 revs per mile. That makes your tires a WHOPPING 2" larger in diameter with 49 fewer revs per mile, you have MASSIVE speedo error (at 55 speedo indicated your actual is around 62 mph). The increased tire diameter also changes the effective gear ratio, causing a massive decrease in acceleration, it also drops the engine RPM down below the peak hp range, killing anything resembling a high speed runs. A 4 cyl Camry should be able to show this X its rear bumper in both situations.

Still waiting on reply to tire rub question.