Have a crankset only a year old - the big chainring seems to have a slight wobble to it when I pedal. So I checked the chainring bolts - and sure enough, one seems to be "tight", but just spins when I try to tighten it. The other 4 are solid.

Is my best course of action to just replace with a new bolt?

Side note - is there a good way to determine if my large chainring really is slightly bent for having a loose bolt for awhile?

Thanks.