Description
The GP4000 is one of the few tires that miraculously delivers on all fronts. It is light (205g 700x23), offers tremendous puncture protection (due to a Vectran puncture protection layer), and provides amazing handling and low rolling resistance (Continental is an industry leader in developing rubber compounds).
For years, Continental has been known as an industry leader in bicycle tires. The GP4000 is a byproduct of ingenious engineers employing the most advanced materials available. The result is one of the fastest, most durable and best feeling tires on the market.
Features:
Vectran Puncture Resistance - Vectran is a liquid crystal polymer that is both light, flexible and strong. It has been used by NASA in the construction of both space shuttles and suits. Continental has patented its use in bike tires, which allows their tires to remain extremely light, while offering tremendous puncture protection.
Black Chili Rubber Compound - The new Black Chili material incorporates rubber compound particles roughly ten times smaller (10nm in diameter, otherwise known as 0.00000001m) than what is typically used in bicycle tires. This creates a denser rubber, without adding more material. Denser rubber increases a tires ability to conform (grip) to the road, while also increasing durability. The Black Chili compound is also more resistant to UV rays, which contribute to cracking and premature tire wear.
Tire Wear Indicators - There are two little dimples in the center of the GP4000, these are wear indicators. When the dimples wear flat, it's time for a new tire.
Available in 10 different colors and 4 sizes (650x23, 700x20/23/25). Kevlar bead, folding tire. Max pressure: 125psi (700x23) 160 psi (700x20). Weight: 190g (650x23/700x20), 205g (700x23), 215g (700x25).
Black Chili rubber is rich in Silica, which happens to be black. The colored versions of the GP4000 use a slightly different rubber compound with a lower silica content.