[MattRoberts123]

My guess would be a bad balancing job. If you can, go to a good wheel and tire shop.. Lots of tire places still use poor balancing machines that cannot handle large tire sizes, but more importantly large wheel sizes.

Look for a HUNTER balancing machine... usually you can even get on the hunter website and they will tell you someone locally that uses the machines.

You will want to have them to a dynamic road force balance... If you can, stand around and see if they will let you watch them do it. Sometimes it can take over an hour to properly do all 4.. but once you ahve it done, you should be able to drive at any speed you want without ANY vibration...

the smallest amount of out of balance weight can cause major vibrations and problems the faster you go.

Hope this helps.

Matt