I have a 2005 RT with 22's and one hell of a vibration from 66 to 74 mph. Anyone know why? I have had the tie rod ends replaced, spacers installed, three sets of 22's and alignments done. No help. Tough one, I know.
Make sure the wheels are balanced properly and professionally. Are you sure that these wheels are the 5x115 bolt pattern? I've seen business' selling them in the 5x114.3 bolt pattern which may work, but may lead to vibration.
In some cases, with the wrong bolt pattern, it is nearly impossible to get the wheels balanced because they're never quite centered correctly on the hub.
Did the wheels come with hub centric rings? They center the wheel to the hub. Also, you need the correct lug nuts and a Road Force wheel balance, and the reason for this to true the tire to the wheel and to check run out.