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Old 08-05-2025, 09:20 AM   #12
BoxsterInTheSun
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Join Date: Oct 2024
Location: San Jose, California
Posts: 111
Quote:
Originally Posted by tcoradeschi View Post
So, you have correctly sized wheels - 7x17 front, 8.5x17 rear. You don’t have correctly sized tires on them. Should be something like 205/70x17 front and 255/40x17 rear.

Not saying that has a damn thing to do with the vibration you’re dealing with, but it does explain what you saw when you swapped front for rear.
This is actually super helpful. I was considering getting new tires anyway, just to rule them out as the cause of the vibration ( I think they're cheap ones ). I'll plan to get correctly sized tires and see if that changes anything, regardless, I'm sure it isn't helping the car with the current ones on it.

Thanks again for spotting that. It has had 2 alignments, and 2 wheel balances, both at different places, and nobody noticed.
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