[Bob In Ct]

Allen:
I have the same problem with my SPF. I'm running Goodrich T/As however. The tires are perfectly balanced (spin balanced), and the steering rack is tight. My local dealer says all SPFs do it and I'll have to live with it. Great!

Since the problem only happens at certain speeds (in my case 60 to 70) I feel the problem may be in a resonance setting up in the front springs at certain speeds. It could be due to the tires not being perfectly round (few are). I would like to find a tire shop that grinds tires to eliminate high spots. I used to work for a major tire company as a Rubber Chemist and I can tell you that most top shelf tires are ground to eliminate the high spots.

Bob