I am running Schwalbe Aerothans in Continental GP 4 season 700C x 32 tires on the road and am happy with them. I got one flat over the course of 1500 miles; a small staple/wire that came in when I unwisely passed through a construction zone. I patched it with a Tubolito patch. My motive for using Aerothans is rotating weight (and small packing size in my patch kit). The Aerothans have great quality control, no flaws noticed in the butt joint.