Casey from SWISCO responded:
October 5, 2023
Hello, It looks like you have an old discontinued roller that is not made anymore. With that being said, we've been told by professionals in the past that the 81-279 works well as a replacement. The adjustment screw is a little higher, but the wheel rolls smoother than the older tank tread style. Take a look and thanks for posting! Alternate image for 81-279
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