gllund and lrquandt,
I made that post about the Bridgestone tire vibration over at the Edmunds forum. I copied and pasted it below this reply so we don't have to go the Edmunds site to read it. Since lrquandt has had all 4 tires replaced, the problem is in all likelyhood not with the tires. It is possible, however, that there is a problem with one or more of the rims and the RFV test would certainly find that. But it could also be caused by other things - a sharp mechanic should be able to figure it out rather quickly given that there is enough vibration to "numb your hands."
lrquandt, good luck on solving your problem and let us know what you find out.
== Edmunds Post ========================================
[b]2008 SF Tire Vibration - Bridgestone Dueler HT
Just thought I would pass this along (there have been other related posts by others as well):
I have a new 2008 Santa Fe Limited with about 1,000 miles on it. It has always had a vibration between 50 and 60 mph. Not real bad, but enough so you could notice. I took it back to the dealer and they rebalanced all 4 wheels. No dice - the vibration was still there.
Took it back again and this time the did a RFV (Road Force Variance) test on all 4 wheels using a Hunter GSP 9700 balance machine. From what I can gather, this machine runs the tire against a roller under a load comparable to what the tire would have when running on the vehicle. It then measures the variance in pressure as the wheel rotates. This can spot out of round tires, defective rims, or tires with belt problems. A good tire should have a fairly uniform pressure (not air pressure, but the pressure it exerts agains the roller) as it rotates.
They said the variance limit on my tires should be about 19 lbs. They found one tire that had a variance of 47 lbs! They replaced that wheel with one from another vehicle (they tested it before they put it on and its variance was 10 lbs.). This completely solved the problem and it is now vibration free.
However, they apparently did not register or reset the TPMS system for the new wheel and now my TPMS malfunction light stays on. I can stop back up and get that reset, so it is not a big deal. I am just glad the vibration is gone.
If you are having a vibration problem that a standard wheel balance does not solve, I would suggest you push the dealer for a road force variance test. Now that I had it done on my SF, I can see why dealers don't use it more often - it took around 30 minutes a wheel to run them on the Hunter machine. They will want to do regular wheel balance and send you on your way - which may or may not solve your problem. If it doesn't, the RFV test is the way to go.
Paul from Ohio