Avenir Discovery 700c Road Tires (Black, 700 x 28c)(turn into Avenir Discovery 700c Road Tire) Sturdy road tires with easy-rolling 110 psi casings Kevlar belts between the tread and casing Shallow tread provides nice traction for damp surfaces Handles both rough pavement and light gravel 60 threads per inch (tpi); measures 700 x 28c