New Veloflex Corsa RACE clinchers are 23mm to 25mm wide. Great racing with fast road performance and an excellent road holding on any type of road and in all weather conditions. Corsa RACE when performance is paramount. Tubular with a very soft 350 TPI (Threads Per Inch) Corespun casing and an innovative compound that provides very low rolling resistance and great road holding. It is equipped with an anti-puncture protection belt and an exclusive latex air chamber, for improved elasticity in every condition.