They were developed by crossing a Turkish strain of Arabians bred specifically for racing with the native Anadolu breeds.
[1] The Karacabey was a very sound breed with good conformation, showing Arabian influence but with more body mass.
They had pronounced withers, a wide, deep chest, sloping shoulders, a straight back, and a rounded, muscular croup.
Their legs were strong and solid, with good joints and bone structure and well formed, tough hooves.
The Karacabey-Nonius was bred as a harness horse and show jumper and was produced by crossing the Karacabey to the Nonius breeds.