You can change the gearing on almost any bike. I have re-configured 5 of our families' touring bikes with mountain bike gearing, and (shifter/brake) "brifters".

All our bikes run a triple with 22/32/44 chainrings, and a 11-34 cassette. This gives a gear range of 16.8 to 103.6 gear inches. This is a good touring setup.

This is my Bianchi Volpe set up that way.