How to check if my garage door rollers are still good?

The easiest way to tell if your rollers are wearing out is if they are continuously popping out of the track. The other is to look directly at the rollers themselves. If they are plastic wheel rollers they can break apart and and keep door from rolling back and forth properly.

If they have nylin treads than the nylon will wear down and make the diameter of the wheel smaller and start coming out of the track. This can also happen with metal wheel rollers but it will take a longer time to wear down. If you put the garage door in the up position and you look at the rollers and they look like the wheels are not at a 90 degree angle from the stem than the bearings are deteriated and need replacement. Yhis will happen consistantly with rollers that do not have ball bearing construction