Check this chart for acceptable tire widths for each rim width:
https://endless-sphere.com/forums/vi...hp?f=3&t=67343 If you are confused about how to measure rim width, go to the Sheldon Brown website and see the section on rims:
https://www.sheldonbrown.com/rim-sizing.html
When I bought my Catrike 700 it came with Schwalbe Ultremo 23 X 406 and I had no trouble at all switching to 1.4 X 406. Have over 10K miles without a hitch. That's going from 0.9" to 1.4".