i just put my 17" rims with Yokos AVS ES100 (215/45/17) tires on my car (rims/tires r new). everything else is stock btw. i launched with my dunlops before and they screech continuously and it grips and takes off. today when i tried the yokos, it screechs once in a while and the car is shakey. is this normal? if not, what can i do to fix it? the place where i bought the rims said they r balanced already. any help on this? thanks in advance 