The Continental Grand Prix 4000S II aka the "GP4000S II" has been the most popular road bike tire of the last couple of years. In this review,

As noted previously, the measured weight is 215 grams which is less than the 225 grams specified by Continental. The Grand Prix 4000S II is also quite a big tire with a width of 27 mm and a height of 25 mm on a 17C rim. All in all, not bad for a tire with a weight of 215 grams.When testing the rolling resistance of bicycle tires, I always try to use tires of the same size as much as possible to make it easier to compare different brands

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.

There are so many significant differences between the Grand Prix 5000 S TR and its TL predecessor that Continental could easily have designated the new version Grand Prix 6000. The headline changes are: 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 But the Continental was only about 1.5 watts slower than most of the other 25mm tires on a perfectly smooth drum, at a 24.5w cost at 40kph compared to most of the other fast tires that were about 23w. With the AS TR, Continental has paired the speed of the Grand Prix 5000 and the longevity and protection of the Grand Prix 4 Season. The new tyre has a boosted tread pattern, multi-layer overlapping ply construction and additional sidewall protection - although from afar it looks very much like a "regular" GP5000. 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.

Thanks to its DuraSkin anti-tear fabric and two Vectran anti puncture strips, the Grand Prix 4-Season holds up under extreme conditions. In the Paris- Roubaix race, the "Hell of the North", cyclists equipped with DuraSkin™ enhanced tyres have the fewest tyre related problems during the race. Incorporating our special wear resistant carbon compound, the tyre is characterized by very good mileage performance as well as excellent adhesion on wet roads and at low temperatures. Active Comfort: The revolutionary approach in cycling. Embedded in the tyre construction the Active Comfort Technology absorbs vibrations and smoothens your ride. Keep this in mind when you're comparing, but I don't think anyone is going to use 120 psi in a 28C tire anyway. Lazer Grip: To make you one with the road, The lasered micro profile structure expands over the tire’s shoulder and provides outstanding cornering. Welcome to the latest edition of road.cc’s buyer's guide to Continental's road tyre range, in which you’ll find everything you need to know to find the right tyres for you, plus a comprehensive guide to all clincher and tubular tyres in their range.

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Now you might think a tyre which rolls well has reduced grip but even during this spell of bad weather where the roads are wet and muddy the tyre has plenty of grip even at higher speeds. 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. The expertly designed layer within these tyres acts as an intermediate between the sharp outside objects and the inner tube within. So how did this legendary compound come into being? At the Continental R&D labs in Korbach, our heroic team of engineers grapple with one of the fundamental problems of tire construction. Essentially, the running properties of a rubber compound of a tire are determined by three co-dependent factors:

Continental's not saying exactly what wizardry of rubber formulations and carcass construction has been wrought to achieve this, but it's impressive as hell, especially when you consider that the improvement over the clincher version of the GP 5000 is 17% — Conti only claims 5% — and the tubeless GP 5000 therefore has over 30% less rolling resistance than the GP 4000 S II. That makes it the fastest Continental tyre yet. While the GP TL was better than many previous tubeless tyres for ease of fitting, there were still rims it didn't quite fit easily. We've found the GP S TR is better still, but you might still run into not-quite-compatible combinations. 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 bike

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The all new Vectran breaker belt, developed and patented by Continental, surpasses even the famous puncture resistance of the former leader in this category, the GP3000. The extremely strong Vectran fabrics are more flexible and lighter than all other puncture protection materials. Vectran offers more resistance to cuts than Aramid, is five times as strong as steel and features less weight than a nylon double breaker. It also maintains strength in the wet. Performance 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.