Well, going back to the original question: Yes they do kick up a bit of small stuff, but I would think that how much would depend on the surface. I ride 60% pavement and 40% packed rock screenings with just a small amount of rougher gravel. The amount kicked up by the GKs on screenings is not that much more than is kicked up by the treaded road tires on other bikes. I have a bit more than 1,000 miles on my set and I've come to like them very much.