Continental's Grand Prix 4000 S II boasts Conti's Black Chili rubber compound for low rolling resistance, impressive traction and long wear, making for one of the fastest tires in the peloton. The GP 4000 S II also uses a tough Vectran sub-tread for exceptional puncture protection, while the 330-tpi casing delivers a velvety-smooth ride. If you're looking for the ultimate road tire, you've found it.
Front and rear cut through under 500km. Soft material picked up 2 metal punctures as well. Always riding with friends on same terrain that had no issues with other brands which are mostly stock tires. Major disappoint on Gran Fondo rice with cut through occurring among the pack. No other flats by 45+ other bikes in this section.
For this price...Bye bye Continental
Bottom LineNo, I would not recommend this to a friend