Concentrating the gyroscope’s mass at its periphery will give the instrument more stability which ultimately improves its rigidity in space. Rigidity is one of the most important features of a gyroscope as it determines how prone is the gyro to process torque on its spin axis as the airframe is displaced.

Additionally, if putting all the mass at the periphery, but spinning the gyro at a low rotational speed will make its rigidity worse. In these conditions, the gyro will be more prone to drift and will lose much of its properties. Spinning the gyro at a high enough rotational speed will give the instrument the best efficiency.