Back in 2005 I bought a comfort bike for casual riding and commuting. I made some adjustments to get a more road bike feel and performance so I could ride longer. One key thing was to replace the platform pedals with what were then called "Campus" pedals. basically a spiked platform on one side and clip-less on the other. I then bought a pair of MTB clipless shoes and the rest was history. I could not believe the difference in the ride, my legs even felt that like they lasted longer. Still have the bike, shoes, pedals, and everything still works fine.