[Bob In Ct]

Rick:
No offense, but it's not balance. Most Cobra owners have the problem with balanced wheels. Even a square tire can be dynamically or statically balanced!

I've been chasing this problem for 3 years. I have had my tires dynamically balanced 3 or 4 times (they're always perfect no matter who does them) with no improvement. I've had people drive along side, the tires look fine. The biggest improvement I got was after I had the tires "trued". Even a slight out of round will cause harmonics to come and go (see Lowell's post above).

The problem exists for many cars, but on most cars the steering wheel is connected to the wheels through a damper (rag joint) and much of the vibration is eliminated before it arrives at the steering wheel. Even a little movement in the system is a lot due to the diameter of the steering wheel.

Bob