The Continental GP 700x 23-25-28c folding tire incorporates Poly X braker protection that reduces the risk of punctures. Blackchili rubber improves grip, reduces rolling resistance and obtains better mileage providing greater durability.It is an ideal tire for training due to its good value for money. The Continental GP 700x 23-25-28c folding tire incorporates Poly X braker protection that reduces the risk of punctures. Blackchili rubber improves grip, reduces rolling resistance and obtains better mileage providing greater durability. It is an ideal tire for training due to its good value for money.Features:Hoop: FlexibleColor: blackMeasurements: 700x23, 700x25, 700x28Clincher coverTPI: 180 (60x3)Weight: 235gr, 230gr