Started losing air in right front tire. Took to tire shop and added air. Hours later lost air pressure again. Return to tire shop and they found the wheel was cracked on the inside of the rim. They claimed it must have been a large pothole. However I do not remember hitting a pothole so bad that I noticed it being abnormal. Even though I had "bumper to bumper" warranty, Hyundai stated it was not covered unless a manufacturing defect, or if you have the "add on " warranty for tires and wheels. Took it to a wheel repair and they welded it and it looked like new. Don't know why a new wheel would crack under normal driving conditions even with potholes which I consider normal.