I've got the shimmy's
 

No not on my weiner...

At about 120 mph I start to get what feels like a shimmy or wobble...Feels like its the front... I've taken it the dealership..and they, "can't duplicate". I've checke tire pressure...My fronts are a bit worn but still have a good 5-7500 left based on my driving...rears are newer by 5000 miles..I should have changed all at the same time, but couldnt part with the grand for perfectly good fronts...Did I screw up or does some else have input...dealer also said they checked alignment...Milerage is 22K on a 05 997s

If the wobble is in the steering wheel (not the body); then most likely its a balancing problem. Find a good tire dealer and have them run the rims on the Hunter GPS9700 balancing system.

The machine runs a bunch of tests for the roundness of the rim/tire. It will tell you if your tires are mounted incorrectly; or if you have bent rim.

Also, some roads are poorly maintained .. It might be the road you are using.

Drive slower - it will save your license and will cure the problem.

:p

definitely agree with mischref...get the wheels hunter road force balanced. could be a bend in the rim or a tire thats out of round. you need to make sure you get a tech that knows what he is doing too. someone who isnt really familiar with the hunter machine can actually make the problem worse