Radiological factors indicating an unstable pelvis are all except
ref : maheswari 9th ed
Posterior sacroiliac complex displacement by > 1 cm
Avulsion fracture of sacral or ischial end of the sacrospinous ligament
Avulsion fractures of the L5 transverse process
Isolated disruption of pubic symphysis with pubic diastasis of 2 cm.
Pelvis and Hip injuries