I use the Continental Ultra Sport 700 x 23s red. they are fairly good, and roll fast without much resistance;you could consider them sleek tires. there are token cosmetic tread designs but its too far on the edge that it really does not touch the road. what i did notice though is they seem to wear faster than the Michelin Lithions on my other bike. But i guess if you wanted grip, you pay for it by the faster wear. flat once in 1500 miles of use. economically priced. last advise if you install them, the tires are unidirectional/roll one way (there is a pointer arrow in the tire). made a mistake at first and you could feel the uneven/rough ride.