The dimensions match with the 81-030, in terms of length (3 1/8), width (3/4) and height (1), and have wheels with an outside diameter of 1 1/4 inches and in inside diameter (in the groove) of 1 inch.
The bearings have worn on the wheels such that the race appears to be oblong and the wheel can be readily moved back and forth over the axle.
I am looking to get replacements, ball-bearing and long-lasting, but I want to confirm that the replacement would work ok, at least as far as you can tell from the pictures that I have attached.
The pictures provide a view of the rollers and the location in the door.
Thanks in advance - Tom O.
