Zipp Tangente Speed Clincher Folding Tyre; Newly designed & engineered for 2015 the Zipp Tangente Speed Clincher Folding Tyre not only maximizes airflow, but also optimizes rolling resistance Ideal for racing & optimized for dry road conditions Featuring a 220TPI nylon casing & new aero tread pattern Has a very low rolling resistance with a rubber formulated for grip & acceleration