18-156SS with larger wheels?

A quick learner from maryland says:
These are identical in size and design in every respect except the 81-156SS shown on top has 1 1/4
User submitted a photo of a patio door roller.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I'm afraid this only comes with a 1-1/4" diameter wheel. There was, at one time, a 1-1/2" wheel version, but it is not available. Did you try and see it you could adjust the roller in the 81-156SS to the proper height you need? You might find you can make up that 1/4" difference in the adjustment.
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