Seconded, I run 700x40 because thats the biggest I can squeeze in the frame, and it is a squeeze. I have recently started running them at a lower pressure, 50/55 Front/Rear, and can hardly tell the speed difference, but the ride is very nice. Wet grip is more than good, quite remarkable in my opinion. Have had a flat, curved piece of valve spring(?) snuck in over the belt. Only one in about 3,000km. The bike feels very secure on these.