Description One of the fastest tubular road tires in the world upgrades to an incredibly supple 320 TPI casing. This casing is a corespun polycotton remaining supple even at a pressure of 200 PSI. The PRB 2.0 breaker crosses super thin Aramid fibers in different directions for incredible puncture resistance, supple ride feel, and low weight. Kevlar SiO2 tread compound includes Silica and small Kevlar® fibers for durability, grip and low rolling resistance. Twin Tread technology simply puts a harder compound in the center for fast rolling and a tackier compound to the sides for secure cornering even in the wet. 42mm smooth presta valve threads into a juncture at the base tape allowing full valve removal for the use of Tufo extenders or Vittoria full replacement valves. Inflation pressure: 115 to 200 PSI. All black. Sizes 700 x 21mm (21-622 ISO; 245 grams) or 700 x 23mm (23-622 ISO; 250 grams).
