Bicycle tires fit a far wider array of rims than motorcycle or car tires.
If you're looking at options for a good slick road tire for your MTB I can heartily suggest Ritchey Tom Slicks at 1.4 inch wide. They are big enough to soak up rough roads and most potholes without issue but are smooth enough to roll really well. Almost as good are Tioga City Slickers in the 1.25 inch width. They roll nicely but the tread it has tends to pick up small pebbles and click until they are picked out.
But of all the 26'ers I've tried the fastest rolling was the Panaracer Paesela TG's with their kevlar flat resistant belt. These are a 1.25 inch tire but the carcase forms more of an egg shape so the contact patch is more rounded and much like a 23 to 25mm road tire. These puppy's roll with efficiency that is close to perpetual motion. And the TG belt gave me a good four years of riding where I don't actually recall getting a single flat with them.