If one or more are not rolling and or appear damaged it should be replaced.
How to replace garage door rollers youtube.
If your garage door seems to get stuck or is jerky it may need a new garage door roller.
Update the new z bearing rollers are 100 000 cycles pricing.
This video shows the simple steps to replace a garage door roller.
To see if your rollers need replacing inspect each of the rollers by watching them as they go up and down the track.
Some people actually try to remove the entire garage door and this.