A mixed terrain tire for a new era of riding. Gravel, dirt, asphalt. Yes please. The Caz features a raised center for fast rolling on asphalt, with specially designed side knobs that corner well on dirt and maintain traction on the street. The 700c will fit our Soma Double Cross, Saga and Wolverine. The 650b can be used on the Grand Randonneur, Soma ES (650b conversion), or San Marcos.