Savannah Chrisley's ex-fiancé, Nic Kerdiles, died in a motorcycle crash this week ... TMZ has learned.
Nashville PD tells us the 29-year-old passed away early Saturday morning as a result of injuries sustained following an accident around 3:30 AM ... when they say Kerdiles ran through a stop sign in a residential area north of central Nashville.
Cops say he struck the driver's side of a BMW with his Indian Motorcycle. We're told the other driver stopped immediately -- and that Kerdiles was transported to a local hospital .