Require six assemblies

A quick learner from USA says:
Attached are details and dimensions of the part and the channel opening size. Looked at product code 81-279. Is this the best choice, or is there another?Is it possible to go to a double wheel set because the double pane thermal door is quite heavy?
Thank you
John
User submitted photos of a patio door roller.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Hello, John. We do have a 1-1/4" tandem roller assembly, but the height of the housing is 1-1/6", so I doubt it will work for you. The one you picked out, our 81-279, seems to be the best match.
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