In addition to being a leading bike manufacturer, Specialized has years of experience with bike fit and that knowledge is reflected in the Sitero saddle. Its silhouette resembles the ISM Adamo saddles—broad, stubby nose and wide rear portion—but it has foam connecting the two elevated prongs that support rider weight. Like the Pro and Fizik saddles, the Sitero uses two elevated foam rails to support the rider’s weight without acting like a tourniquet on the worst possible parts. One notable difference is the shape of those supportive rails. Specialized’s saddle has less abrupt transitions between the elevated rails, creating gentler contact points. Another point of differentiation between this model and the ISM Adamo is weight distribution. The ISM seats support all the rider’s weight on the two tongs at the tip of the saddle, while the Sitero can spread a little more pressure through the sit bones for some rider positions. A single bottle cage mounts directly to the rear of the saddle for either hydration or flat repair storage.