The rollers of your garage door move along the track as the door opens or closes. They can impact a door’s operational smoothness or noise level.
Good: Steel rollers create a loud garage door because of the metal on metal contact with the track.
Better: Plastic rollers are not as loud, but there is no bearing so there’s nothing to lubricate to help the door operate smoothly.
Best: Nylon rollers are quiet as they roll along the track. They have sealed bearings so they’ll never need lubrication.