I have a slight vibration in my seat at about 130mph, is there any shops that can test wheels up to 170?

 

Maybe an alignment is needed.

 

Find a shop with a HUNTER Road Force balancer. You can search on Hunters website and they'll tell you what shops in your area have one.
-GP-

 

I had the same problem, Just balance your tires and it should stop. If it doesn't try wheel alignment.

 

At speed the smallest defect will show up, most wheel/tire shops don't have
their balance machines recalibrated unless they're way off and it's obvious.
Try having tires rebalanced at a different shop, ask them to check your tires
at speed for defects. Alignment has nothing to do with vibration, but more
about how the car drives at 130 MPH. On a totally flat (perfect) road at speed if the alignment is right on you could let go of the wheel....not that you'd want to.....
Gary

 

It all depends on you tires too, mine hum at high speeds on the freeway. Can't really afford new tires now, kinda broke.