IMPORTANT NOTE: Never remove the BOTTOM FIXTURES or fasteners on a sectional garage door with the spring fully loaded. 2" 13 ball bearing nylon coated with 7" stem.2" 13 ball bearing nylon coated with 4" stem.2" 11 ball bearing nylon coated with 7" stem.2" 11 ball bearing nylon coated roller with 4" stem.Here are a few examples of rollers available for replacement. Also the length of the roller stem is available in 4", 5", 7" & 9" depending on the design and construction. Replacing steel rollers with vinyl or vinyl coated rollers will reduce the sound of the roller running along the track. (Example) A four panel garage door will require 10 rollers, A 5 panel door will require 12 rollers. When purchasing rollers, you will find that there are a few choices to pick from, determining quality and noise factor. The number of rollers used on one door will vary on how many panels the door is constructed with. Along with the spring and cable system to balance the door and guide the movement without exess stress on the components. A roll up sectional garage door uses rollers, hinges and tracks to operate the door.
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