Let's assume a scenario where wheel damages is what ends Curiosity's mobility on Mars. What kind of damages to the wheels would cause immobilization? For example, would a wheel collapse (i.e. become too deformed to roll) if the barrel that touches the surface was cut straight through perpendicularly to the rolling direction?
Given that Curiosity would traverse terrain as rough as the roughest one thus far encountered, is there an estimation of the kilometer lifetime of the wheels?