Yes, you can use a smaller step in a larger doorway. There are a lot of campers that have something in the way like a cabinet door, fire extinguisher, etc. so many others have had to use smaller width steps to have enough clearance.
The MORryde StepAbove RV Steps for 21-3/4" to 22-1/4" Wide Doorways # MR58RR you were looking at will work with your 23.5" doorway and and fit an entry height of 30" - 33". If you have a different entry height then let me know and I can find the correct steps... view full answer...
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