The metal shaft that slides in the bracket on the door itself and the ball bearings on the roller wheel.
How to grease garage door wheels.
If your garage door rollers have nylon wheels that make contact with the track make sure to only lubricate the bearings without getting any lubricant on the nylon itself.
Once your door is clean spray a lithium based grease or garage door lube onto the hinges and rollers.
Metal rollers are how your garage door travels up and down.
Then clean the garage door tracks with a damp rag to get rid of any dirt and debris.
While metal rollers require less precision it s a good idea to protect your floor and your car from any drips along the way.
If your rollers feature nylon wheels be sure to lubricate the rollers without getting any lubricant on the nylon material.
All metal rollers don t require as much precision but make sure to wipe away any excess lubricant to prevent it from dripping on the garage floor or your car.