Any Advice on Drifting to Right while driving

[jacab]

While driving my 99 xk8 with I get a pull on one side. Pilot Sports has a drift to the right when going down the highway. I had the dealer do a $189 alignment (along with a "check and inspect" of my wallet) and they claim that the post alignment spec is "spot on" and due to the wide tires, the car will follow the slight crown of the road.

After speaking to an independent shop about the problem, the owner of the shop believes that it is a radial tire pull and by using his "road force" balancing machine he can determine:
a. which tire is causing the problem;
b. possibly fix the problem; or
c. replace the tire because it is directional and can only be switched front to back and not side to side.

Any thoughts or opinions would be greatly appreciated and if you have had experience with "road force" balancing what is your opinion of the technology.

Thanks
jacab

[craigguy]

I would have just said bring it to the shop that says he can figure it out.

Did you do that? What did it turn out to be?