Recently my stearing wheel started vibrating when driving 30 plus. I don't think I've had any alignment problems since I last had it aligned, (just a slight pull to the right)and my wife denies hitting anything when she has driven my X. From what I gather I think one of my tires maybe out of balance. Is there a way I can check other than taking it to a tire shop. Tire shops used to offer free alignment checks and now I see that they charge for it, so I figure there will be some type of labor charge for checking my tire's balance. I'm just trying to save pennies and time wherever possible. Thanks for the edumacation.