Garage Door Roller / Wheel / Heavy-duty 13 Ball Bearing 12 PackGarage Door Roller Wheel Heavy duty 13 Ball Bearing 12 Pack Twelve heavy duty garage door rollers from Randy Travis Machinery are made with 13 ball bearings to create less friction, allowing your garage door to open easily. Each roller is constructed with a lubrication groove, which dispenses lubrication over the long term. This means you won't have to lubricate them as much or as often as other garage door rollers. Manufactured in the standard 2 inch