Challenge Grifo Tubular Cyclocross Tyre

. The Challenge Grifo Tubular Cyclocross Tyre provides exceptional grip and traction while its rolling performance is so fast its beyond competition ready. The casing is produced with the latest technical materials like Corespun a cotton and polyester combination. Corespun is a thread process that provides a supple and very strong casing while keeping weight low. The casings have a high TPI count that can reach over 300 TPI. The production process avoids any vulcanisation, which enables all materials to keep their suppleness and flexibility Features Use Cyclocrosss, Mixed, Soft Pack Type Tubular Puncture Protection PPS Casing SuperPoly TPI 300 Inflation Pressure 23 90 psi Weight 415gBuy Challenge Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.