westernbikeworks.com/product/continental-2013-grand-prix-4000-s

Eliminate compromise in your race tire.

The Continental Grand Prix 4000 S is Conti's most advanced racing clincher, with a truly unique blend of speed and durability. Thanks to a bevy of exclusive high tech materials, and years of testing and development, the GP 4000 manages to preserve its low rolling resistance and great handling while providing exceptional puncture protection and higher mileage performance than a typical race tire.

The Grand Prix 4000 S is essentially identical to the black version of the standard Grand Prix 4000 model. The "S" actually stands for "Schwartz," the German word for Black; both the black GP 4000 and this GP 4000 S model use Continental's top Black Chili rubber, an exclusive material which cannot be produced in colors.

What makes Black Chili unique is its ultra dense construction and high silica content, which deliver outstanding grip and blazing speeds. This cutting-edge compound is also optimized for reliability and longevity, making it a great choice when performance and durability are top priority.

Both the colored and the Black Chili versions of the GP4000 feature a Vectran puncture protection barrier. Originally developed by NASA in the construction of both space shuttles and suits, Continental has patented Vectran's use in bike tires, which allows their tires to remain extremely light, while offering tremendous puncture protection.

The Grand Prix 4000 S features three fabric plies for a total of 330 TPI, has a Kevlar folding bead, a max inflation pressure of 120 PSI and weighs 205g (700c x 23mm size). This version is available in 700c (622 ISO) and various widths.

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