Continental Grand Prix 4000 Bicycle Tire with Black Chili (700x25, Black)
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- Vectran Breaker Technology: lighter, reinforcing tread protection
- Black Chili Compound: faster, stickier, longer lasting
- Tire Wear Indicators
- Resistant to UV Rays
- Weight: 215 grams
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Continental 0118519 Grand Prix 4000-700 x 25 Black Tire with Black Chili is one of the few tires that miraculously delivers on all fronts. It is light, offers tremendous puncture protection with Vectran, and provides amazing handling and low rolling resistance thanks to Black Chili. The patented Vectran Breaker reconciles the conflicting goals of low weight, low rolling resistance and top puncture and cut resistance in a fascinating manner. The material is extremely tear and cut resistant and is also flexible. It retains these properties even under constant stress. The new Black Chili material incorporates rubber compound particles roughly ten times smaller 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 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. The Grand Prix tires also come equipped with tire wear indicators so the rider knows when to swap out tires. Specs: Color - black/black skin foldable; Black Chili - yes; Weight - 215 grams; Recommended PSI - 95; Maximum PSI - 120; PU - 10.
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I'm now using black ones that didn't have that issue.
The front one is fine. But I won't be running these on the rear again. One tire got a cut in the sidewall from a rock. No flat, but I didn't feel comfortable running with such a deep cut.
The second got perforated right in the middle of the tread from something I didn't see since I was on a club ride. Perhaps I've just hit a patch of bad luck, but I've never had to toss tires so quickly in my life.
I've gone to the cheaper GP with Black Chili, which have worked well for me in the past. We'll see if Conti can keep me as a customer...