Challenge Grifo 33mm Open Tubular CX Tyre
Cyclocross World Champion for years. Whether a Pro or just a hard core rider, Grifo is the tire you need. Unbelievable grip with no rolling resistance compromise. Open Tubulars mount like a standard clincher, but are made using the same artisan Handmade process as Challenge's Tubular tyres and maintain most of the suppleness and ride quality gained from a Handmade Tubular.