Good call! Before I did anything major I took the VX to ANOTHER tire place and had them balance all 4 wheels. Turns out, just as stated, that it was one of the two back wheels. After your post I remembered that when I got the tire put on one of the rear wheels the guy was in a big hurry (they were about to close and had kept me waiting for a long time). I drove the VX around for a test and then drove it home from work - no more vibration! Thanks guys

Quote Originally Posted by VehiGAZ
Whoa doggies - let's start with the simplest and most likely culprit - tire balance.

A vibration that occurs only at certain speed ranges is generally one of two things - tire balance or a bad CV joint (not an alignment problem). If you feel the vibe in the wheel, it's one of the front tires; if you feel it in the frame (i.e., through your butt), it is probably one of the back tires.

Since you said the tires are new, I suspect them the most. Have them rebalanced by whoever put them on and if that doesn't help, have the CV joints checked out next.

Granted, your alignment may be messed up, but that's probably not the cause the vibration. It may have caused a CV joint to fail, though, or so I have heard.

Good luck!