MTB owners, if U're riding are done predominantly on the road, pls change to slick tires. Or better still, have 2 sets of wheels, one set knobby & 1 set slicks. U'd look really, really silly & inexperienced riding knobbies on the road. Change it to slicks at the time of buying, most shops will just change it for free. What do U get by riding slicks ? Better control, better grip, much, much lower rolling resistance, better speed, better cornering, everything better & less rookie factor.