Lighter and more performing the new Sidi MTB sole is made of nylon with PU (polyurethane) inserts. The shape of the sole tread has been specifically designed for mountain bike, it allows a good grip, facilitates mud dispersion and provides the right stability. The central insert with the Sidi logo works as non-slip and it is practical and useful especially to the less experienced users. The toe area that is more subject to wear, especially when walking, can be replaced by screws and still offers the possibility to mount crampons to improve traction on particularly muddy grounds. SR17 represents the ultimate result in terms of stiffness for pedaling and flexion for walking.