How do 'Multiple-Turn' spiral rings solve the 'Gap' problem associated with standard snap rings?

Standard 'constant section' snap rings have a large gap to allow for installation, which creates a 'dead zone' where no retention exists. In contrast, a 2-turn or 3-turn spiral retaining ring provides a continuous $360$-degree shoulder. This is crucial for applications involving bearings with large corner radii, as it ensures the bearing race is supported around its entire circumference. This continuous support prevents the 'tilting' of the bearing and ensures the axial load is distributed evenly into the housing or shaft, significantly improving the fatigue life of the assembly.