For the past few days my hubby has been noticing this weird shaking coming from his truck, and had no clue what it was. Well, today he discovered that it was his tire. His tire was not tightened on all the way. Come to find out that he had been driving on ONE LUGNUT with all the tire bolts/stems (the rods you screw the lugnuts onto) BROKEN OFF. God saved my husband's life, he drives on the highway every day going to work. We think someone may have tried to steal his rims, but whatever the case is he's okay and I'm so shocked and happy that nothing horrible happened!!!