There's no way that trimming the valence could cause vibration to be felt is there? I swear it feels more "vibrate-ey" now. Or I could just be being over sensitive. I took it on a 700 mile trip and it was vibrating like crazy, went and got tired balanced and lowered psi which seemed to help, but still seems a bit more than I remember
1. No that wouldn't cause it.
2. You have aggressive AT's not not all seasons. Its the nature of the tires.