[rick504]

I purchased a set of used 20 beyern multi wheels with nitto nt555 tires. When driving between 60-80 I have a heavy vibration feeling in the seats. I had them balanced three times and still feel it. The last time I had them road force balanced on the hunter machine and they balanced out perfect. I swapped my stock wheels back on and have zero vibration. Also they are centerbore 72 and fit firmly on the hub. Any ideas? I'm stumped and so are the tire techs. We also had a wheels specialist come in to check the truing of the wheel and it had no bends whatsoever.

[Sean@PYSpeed.com]

Check tire pressure..
How's your alignment?

[TheBingoBalls]

Check your tires. Had the same thing happen to me, ended up being uneven tire wear on one of the rear wheels.

[avocet]

could be an out of round tire. try rotating them through all four positions and see if there is any
difference.

how much vibration are we talking about? new tires will generally require a "break in". after a few hundred miles they will settle in. some more than others.

[rick504]

alignment is good. and tire pressure is 35 up front and 40 in the rear.

[rick504]

Originally Posted by avocet

could be an out of round tire. try rotating them through all four positions and see if there is any
difference.

how much vibration are we talking about? new tires will generally require a "break in". after a few hundred miles they will settle in. some more than others.

Really heavy vibration between 50-70 and clears up close to 80 mph. The tires have 1500 miles on them.

I tried riding with the stock wheels in the rear and aftermarket in the front but the car limits me at 35 mph and won't let me drive fast enough to see if it vibrates.