Thinner tyres on MTB rim?

I’ve got an old MTB , currentky with 26x1.95 tyres on
I want to put some much thinner tyres on to use on road for commuting
Is there a limit I can down to on tyre size?
I want to put some much thinner tyres on to use on road for commuting
Is there a limit I can down to on tyre size?
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The size, smoothness, and pressure all help a great deal for commuting efficiency!
Following getting a chronic illness I’ve got to shift to a much easier bike to ride and I wanted to do that with what’s in the garage rather than buy new, given that it might not even be possible to cycle regulalry
Thanks again