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gillies
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?