Continental Grand Prix 4000 Black Chili Compound Road Race Tyre

Product Information

It's still available from some retailers but the Grand Prix 5000 TL has been nominally replaced by the Grand Prix 5000 S TR. We'll keep these details until retailers run out. 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

measurements with different inner tubes, measurements at 15% tire drop, and measurements at the same comfort level. Even though the 28C GP4000S has a maximum inflation pressure of 115 psi, measurements were taken at pressures of 120, 100, 80 and 60 psi. Grand Prix 5000 AS TR is a new all-season GP5000, adding some extra protection, grip and longevity to the fast GP5000 road tyre lineup. Even though this is the heavier of the two new GP5000 tyres, it is perhaps more exciting for those who enjoy a little speed boost in everyday conditions and not while racing. 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. 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.

Comments

I'm not sure at what kind of speed this turnover point would be. This also depends greatly on the tire/wheel combo.

Between finger and thumb, you can feel that the GP 4 Season is stiffer than a lighter summer tyre because of this extra protection, but for the casing Conti uses the same thread count at 330tpi (actually three layers of 110tpi) as it does in the GP 5000s. Compared to rival all-season tyres such as the Michelin Power All Season with its three layers of 60pti, it is much more supple. PerformanceThe rear tyre is a 28mm GP4000S2 so I decided a 23mm tyre would be fine for my requirements on the front. 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. Of course, it's always possible to slice open and puncture any tyre on a first ride, (it's sods law) but the likelihood is much lower on these. We've managed entire summer seasons rolling on these with no punctures - and only a handful of flats when running them even in winter.

Chain reaction Cycles and CRC are trading names of Wiggle Ltd (In Administration) registered in the United Kingdom at 1000 Lakeside, Suite 310, Third Floor N E Wing, Portsmouth, Hampshire, PO6 3EN, it gives an excellent opportunity to explore the differences between wider and smaller road bike tires. On a rough drum — which we used to emulate normal road conditions, the differences were even smaller. The Conti was measured at 32w at 40kph, dead in the center of the tires tested that ranged from 29.9w (Pro One) up to 36.1 (Clement LCV). I've retested the same 25C GP4000S II I've tested in July 2014 for the 25C GP4000S II review. Results were within 0.5 watts, so I've used the data from 2014 to keep the 25C data consistent PolyX Breaker Technology With their PolyX Breaker, Continental bring PKW know-how to the bike tyre arena – Polyester has been used successfully for years in car tyres and been tried and tested many times. The extremely resistant polyester fibre is woven tightly crosswire making a very high fabric density which not only makes the Breaker more resistant to foreign objects but is also resistant to punctures. The rolling resistance is not affected either by the PolyX Breaker.NOTE: As of 2021, we've improved the puncture resistance tests and now provide 'Total Puncture Score' as the main puncture resistance indicator. Lazer Grip: To make you one with the road, The lasered micro profile structure expands over the tire’s shoulder and provides outstanding cornering.

So in my view these tyres are well worth the money, not only for life span, performance, grip, reduced rolling resistance, and puncture resistance. Tell us what the product is for and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it? NOTE: As of 2021, we've improved the puncture resistance tests and now provide 'Total Puncture Score' as the main puncture resistance indicator. If the text below mentions puncture resistance, we're referring to 'Puncture Force Sharp Needle' which was our original test. I'll be comparing a 23C, 25C, and 28C Grand Prix 4000S II to see how weight, size, and rolling resistance compares across different sized road bikePerformance in the rolling resistance test is great. At an air pressure of 120 psi, rolling resistance is a low 12.2 watts, which is excellent for a Tour / Race type tire. Dropping air pressure to 100 psi results in a rolling resistance of 12.9 watts. Lowering air pressure even lower results in a rolling resistance of 13.7 watts at an air pressure of 80 psi.