The Colnago racing soul triumphs on dirt roads with the Colnago G3-X Shimano GRX 820 2×12 the gravel bike for tackling any type of terrain in any season designed for riding on dirt and muddy terrain comfortable even over long distances. The G3-X is made with a carbon monocoque frame and fitted with disc brakes. Plus the chain stays are wide enough to fit tires up to a maximum of 40 millimeters.