more comfortable ride. i dont know real world how much youll notice rolling resistance, ive never had anything but crappy tires on my old bike and my new bike has only had nice tires on it. i do feel confident they will be more comfortable though as my new bike ought to be less comfortable than the old one, but it definitly isnt (old -lugged steel with touring geo, slack angles long chain stays vs new -lugged steel with steep geo short chainstays).