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I don't know how they do their puncture tests
Hammer and nail, then adjusted by tread thickness. It's only one point difference, and they don't show the spread of numbers for the multiple test points to give an indication of the error bars. 10 vs. 11 could be 10.4±2 vs. 10.6±2 🙂
gbj_tester-
"The puncture resistance test is performed with a 1 mm steel needle to which weight can be added.
The needle gets positioned at the center of the tread for the tread puncture test and on the sidewall for the sidewall puncture tests. More weight gets added until it punctures the tire.
The puncture test is performed 5 times for both the tread and sidewall. We then take the average of these 5 punctures and calculate this to a puncture force score in points. A score of 10 in the puncture force test means it takes twice as much force to puncture when compared to a score of 5.Puncture Factor
Puncture Factor is calculated by multiplying the puncture force from the puncture test by the measured tire thickness. Just like the force required to puncture a tire, the thickness of the tread and sidewalls is also very important to prevent punctures in real-life.
What we've found is that casing material and anti-puncture strips take a lot of force to puncture. The rubber, on the other hand, doesn't take much force to puncture as it's a very soft material. We found that a tire without an anti-puncture strip but that does have a thick layer of rubber doesn't take a very large force to puncture. In reality, it does offer a lot of puncture protection because the thick layer of rubber simply doesn't allow the object to reach the inner tube."Yeah, so now I need someone like skinny to run them to their death like I would and let me know how they compare with 4000S. I know Matt F didn't have much luck with them in last year's TCR whereas I was golden on my Pro 4 Endurance but they're substantially tougher than 4000S and eventually met their match with speed + rocks in Spain.
hippy
"benefit of the newly improved Vectran Breaker layer, the polymer which forms a multi-strand thread and acts as a blockade against foreign objects such as thorns, glass or flint. This is said to be improved by 20 per cent in the new GP 5000"
"Our tests confirm rolling resistance of the GP 5000 is actually even lower with a maximum of 18% less rolling resistance at the highest air pressure of 120 psi / 8.3 bars! At the lower air pressure of 80 psi / 5.5 bars, there is indeed 12% less rolling resistance according to our tests."
"Unfortunately, our tests indicate that puncture resistance of the GP 5000 has gone down when compared to the GP 4000"
https://www.bicyclerollingresistance.com/road-bike-reviews/continental-grand-prix-5000-2018
These guys actually do a comparison: https://www.bicyclerollingresistance.com/road-bike-reviews/compare/continental-grand-prix-4000s-ii-2014-vs-continental-grand-prix-5000-2018
I don't know how they do their puncture tests but that tallies with what I said - they're a couple of watts faster but not as puncture resistant. Has anyone done a long term test for durability?