Dynamical radii from cluster galaxy velocity in the splashback region. Upper panel: The solid orange, dash-dotted green, and dotted black lines show R_infl, R_σv, and , respectively. The shadowed areas show the associated standard deviations. Bottom panel: The solid orange and dash-dotted green lines show the ratio between R_infl and , and between R_σv and , respectively. The dotted line shows equality. The orange, green, and grey shadowed areas show the 1σ confidence levels for each ratio with the corresponding color.