Dorwal aluminum sliding door rollers

A home owner from Columbus Ohio says:
I am looking to replace the rollers/roller assembly for an aluminum sliding door. There is a large headed screw or bolt running from inside to outside through the door with a two piece roller assembly inside. There is an octagon shaped cutout on both inside and out outside piece is threaded.
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Casey from SWISCO responded:

Hi, I would start your search by looking over the 81-230 wheel. It was very popular in the early days of Acorn, but without seeing your roller, I can't confirm this is definitely what you need.

81-230 : Replacement Steel Wheel
Replacement Steel Wheel
How to maintain a sliding glass door
How to maintain a sliding glass door
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