Sorry but for far too many people who have ridden the GP4S this is a complete contrast to their experiences including mine. The tyres feel dead/unresponsive and sluggish, you do not keep your "summer speed" at all as they feel really draggy, they might have some additional grip in the wet but whatever micro improvement over x tyre I couldn't tell but having some unmeasurable extra grip at the expense of how they are much less a quality ride and lower performance (over Giant P-SL2s in 28mm) would simply not be worth it at all.

All that to say, you aren’t going to lose your local race because you have Grand Prix 4000 S II tires on your wheels. NOTE: As of 2021, we've improved the puncture resistance tests and now provide 'Total Puncture Score' as the main puncture resistance indicator. I'm not sure at what kind of speed this turnover point would be. This also depends greatly on the tire/wheel combo.Just to prove a point I use a newton+ power meter and looking at the data , you can see a reduction in Rolling Resistance.

Though not the winners when it comes to rolling resistance,research suggests that when combined with aerodynamics, at over 35kph,these might even be the fastest, thanks to the tread pattern playing a role. The GP5000 boasts two new features: Lazer Grip texturing on the shoulder of the tread and Active Comfort Technology. Lazer Grip is a slight roughening of the tread intended to improve cornering grip, while Active Comfort is an elastomer embedded in the tyre to damp vibrations. At the end of 2018 the big news in Continental tyres was the introduction of a successor to the Grand Prix 4000 S II, unsurprisingly named the Grand Prix 5000. Not only did Continental replace arguably the most successful clincher tyre of all time, but they finally produced a tubeless version.However, a friend of mine has had no end of issues with punctures and poor quality so maybe it's a hit & miss thing? Which it shouldn't be, obviously.

To read about all other test conditions and how tires are tested, please read the Rolling Resistance Test Conditions Puncture Force Sharp Needle: Pre-2021, this score was known as 'Puncture Resistance'. On some tires with weakly bonded casing wires, the sharp needle can split the casing wires resulting in a lower score.This article has been partially replaced by our Continental Grand Prix 5000 23, 25, 28, 32 mm comparison. The newer Continental Grand Prix 5000 article is much more detailed and includes Puncture Force Blunt Needle: The Blunt needle has a flat tip and won't split the casing wires. To puncture the tire, the blunt needle has to cut the casing wires. All in all, I think the differences aren't that significant, in particular between the 23C and 25C tires. I'm looking forward to repeating this Sure, there are tyres that can boast a more supple rubber and lower rolling resistance that could save you 1.5watts - but these offer an almost-perfect ride quality coupled with a significantly reduced likelihood if spending time beside the road fixing punctures.