I was driving on a road, my vehicle began to shake until eventually dropping to the road and dragging until i could gain control of it , by applying the brakes. i noticed out of my driver's side window across the road was my tire rolling at a rapid speed. i called 911 to receive assistance to stop the traffic and to help with my disabled vehicle. officers assisted with helping myself, my mother and my two toddlers out of the vehicle and to retrieve my tire. the tire had fallen off of my vehicle, at the rim, leaving the bolts and the middle portion of the rim still attached to the vehicle, while the remaining majority of the rim was still attached to my tire rolling down the road. the vehicle was in proper working condition prior to this incident. i did not hit a pothole nor was i in an accident. my vehicle was towed to my residence, the following day after contacting lexus and advising them of the incident, i was instructed by lexus to have the vehicle towed to their property for an inspection. after the vehicle arrived to their property, they contacted me and stated that the the incident was not a manufacturers defect, that had it been a manufactures defect it would have happened within the first year the vehicle was manufactured. lexus then informed myself that i needed to make a claim with my insurance company for damages that have been incurred. prior to this incident this vehicle was in perfect working order. all previous services were performed by auto lenders and the most recent was june 23, 2015, when a routine oil and filter change occurred, as well as, the brake pads and rotors being replaced. the safety of ourselves and our children are a great concern going forward in this vehicle and we do not feel that the manufacturer is in fact concerned with our safety and well being and if this is an issue with other lexus vehicles, it is a safety concern for all.