Tough technology that can withstand all conditions.With the Grand Prix 4 Season\'s DuraSkin™ anti-tear fabric, this tyre is as hard as nails. Featuring in the hellish Paris - Roubaix race, it was later found that riders who had been using this tyre with DuraSkin™ actually suffered less punctures and other tyre related incidents.The \'carbon compound\' featured on the Grand Prix 4 Season, means that it is a extremely wear-resistant tyre, showing minimal signs of damage after many long rides. A double Vectran® Breaker belt under the tread raises the puncture and cut protection to the highest level available on the market. Available in 23mm, 25mm and 28mm versions, the Grand Prix 4-Season is a customisable choice for all types of riders. - T.H The Continental GP 4-Season is the standard: full score in all categories! The tyre is lightweight and rolls well. It achieved by far the best result in offering fantastic grip and puncture protection, even in the wet and cold. Not just the top winter tyre. The test results from Road Bike Magazine Weight 230gFolding beadMax.Inflation 120(psi)Click Size Guide To Enlarge