When I had my rear tires balanced I noticed my rim is slightly bent. I have been driving with it for a few months now.

Could this be damaging anything?

The car does vibarate some but nothing serious.

 

Slight bent will not be a problem. But diferrent people define slightly bent differently. If its a real small bend dont worry about it to much, if it gets worse, then its time for a new rim. fparts salvage usually has most rims for 50.00 a peice check it out at www.fparts.us

 

Definitely not good for your wheel bearings and any excess vibration/wobble is going to accelerate wear on flexible joints and tire. If it was ok for them to be bent, they would not spend so much time in manufacture to make them straight.

If you can feel it, it's time to get it fixed.