For a look at the new Challenge Gravel Grinder and Grifo tires and more information, go to the CXMagazine.com article. Have thoughts about these tires or others? Check out the Riding Gravel Forum tires thread. Do you have news about an event, a race, products, or anything else gravel-specific? Contact us!
According to Challenge, there will be a 38mm clincher Gravel Grinder to go with the current 36mm Open Tubular.