The garage door moves up and down in the track, guided by the garage door rollers. The rollers allow the door to move freely. Rollers have bearings and roll as the name implies. Noisy and sticking rollers are not uncommon.  Lubricating them is often the option.  With a little oil, the rollers can work smoothly again.  If the rollers seize up, you will need to replace them.  When it comes time to replace your garage door rollers give us a call or book your service online. We at Garage Door 4 Less take pride in our life-time parts warranty on garage door rollers,  so you cant go wrong.