Vittoria Corsa Speed Tire - 700 x 23 Tubeless Folding Black G2.0. This race-day specific weapon has raised the bar on tire technology. The Corsa Speed uses a proprietary Graphene compound which is then paired with an ultra-fine Corespun-T casing. The end result is a tire that maintains the lowest rolling resistance while still providing the trademark Corsa suppleness and outstanding wet weather grip320 TPI Corespun cotton casingProprietary Graphene compound