It is not uncommon for wheels on these vehicles to be very easily bent or otherwise damaged, often to the point of requiring replacement. This can happen even with no apparent damage to the tire.
Car Problem Reports
Mitsubishi Eclipse Wheels may easily be bent or damaged
Mitsubishi Eclipse Problem
Average Mileage: 57,333 mi (30,667 mi - 84,000 mi)
Visitor, 2002 Mitsubishi Eclipse, 84,000 mi
Front wheels had a balance, shimmy problem. Tire shop balanced both tires and said that rt. front wheel was bent. I rotated bent wheel to rear, problem solved.