Vibration at 70mph

[8sum8]

Originally Posted by VTvaster

I just had new tire mounted and balanced on all corners. There is only a slight vibration when the car gets up to speeds above 70 mph. Could this be an allignment issue or is that just the way the Box's drive.

Unless you already have the viabration issue before you got new tires, I am pretty sure it is the wheel balancing. I had a similar problem before on my ML 500 after balancing and rotation. Took it to a different shop and was told that the prior shop didnot scrap the old weights but balanced the tires by simply adding additional weights. I don't fully understood the logic. "Balanced" is "Balanced," right? But, I do not have the problem anymore. Probably taking your boxster back to the shop and have them rebalanced the wheels would solve your problem.

I have never used spacers but was told that these can cause viabrations.

[1JB]

There should not be a whisper of a vibration. I've taken mine to 112 mph without so much as a hint of a vibration.