Continental Grand Prix 4000 Black Chili Compound Road Race Tyre

Product Information

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. measurements with different inner tubes, measurements at 15% tire drop, and measurements at the same comfort level. 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. 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. Performance 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.

The bigger the tire, the lower the rolling resistance at the same air pressure. When you run lower air pressures, the differences get With regards to grip, the Conti sits in the middle of the field. Like the Schwalbe, it provides good control at the limit and a predictable grip threshold. The sidewalls are relatively stiff and can sometimes cause the tire to feel skittish on uneven surfaces. We ran the tire at 6.5 bar, which already feels plenty hard, so we strongly recommend keeping the pressure below that mark. However, according to Conti’s recommended pressure settings, that is already at the lower end of the scale. 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. While the tread puncture resistance score is slightly below average, the sidewall puncture resistance score of 5 points is slightly better than most other comparable tires. The Schwalbe One V-Guard ( review) is a tire which comes very close to the Grand Prix 4000S II in the rolling resistance test. The Schwalbe One has a better tread puncture score (12), but a lower sidewall score (4).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 NOTE: As of 2021, we've improved the puncture resistance tests and now provide 'Total Puncture Score' as the main puncture resistance indicator. 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).

Off-course, what will be won in the rolling resistance department, will be lost in the aerodynamics department. But this isn't a massive range expansion. There has been a TT version of the GP4000 or GP5000 for some time, so it makes sense to make a TR version of that. And then, why not a tougher version for those who want to go fast on less than ideal roads or compacted gravel that would/could result in punctures if running the standard version of the tyre. 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, 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.

The Goldilocks performance road clincher

In theory that means sealant isn't required, but Continental recommend you use 30-60ml of sealant to protect against punctures. Everything else being equal that extra layer also means increased rolling resistance, but it seems everything else is far from equal. According to Jarno Bierman at bicyclerollingresistance.com, the tubeless GP 5000 has very low rolling resistance, second only to the Vittoria Corsa Speed Open TLR, which has thinner tread.

The expertly designed layer within these tyres acts as an intermediate between the sharp outside objects and the inner tube within. The tubeless GP 5000 is available in 25, 28 and 32mm widths, plus a 28mm wide 650B version. Our samples of the 25mm versions weighed an average of 302g each; we've seen reliable reports of 295g samples too. That's heavier than some comparable tubeless-ready tyres (a 25mm Schwalbe Pro One weighs about 255g) because Continental has gone for a fully tubeless construction with an airtight rubber layer on the inside. For riders who want to carry their summer speed through the winter without puncturing, these are the tyres for the job"

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? 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. 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.