[getmygoat]

So today I swapped the front tires from the convertible to the hardtop. The convertible was pretty smooth at speed with its original tires.

The hardtop with only the convertible rear tires installed ran pretty good, still some vibration but much better.

Now with the hardtop running all four convertible tires, the thing shakes like crazy. Weird. Its way worse than the convertible is at that speed with the same set of times.

So, one theory is that the "on car balance" of the original hardtop tires compensated for an imbalanced front rotor? Now with the converitble tires on the front, there is no compensation so the rotor is showing itself... (Grasping at straws here).