A variety of laboratory tests, both static and dynamic, have been employed by engineers with the intention of defining a measure to correlate with real world vehicle rollover propensity. Two static metrics, Title Table Angle (TTA) and Critical Sliding Velocity (CSV), have recently been put forth as measures that identify causal factors related to rollovers in a predictable manner. This paper explores the physical principles underlying TTA and CSV and their relationship to real world rollover performance. In addition the ability of TTA or CSV to accurately predict rollover propensity among various vehicles is examined.