The sidi technology used in mountain biking is transferred to the gravel discipline with its most technical aspects in a high-performance, stiff shoe with a closure designed for high demands. TECNO-3-SYSTEMThe TECNO-3-SYSTEM ensures an optimal fit over the entire length of the shoe and adapts the upper material to the shape of the foot - for a customised fit. SIDI's famously reliable and interchangeable closures are enhanced by an all-new, patented SIDI Wire material that is completely unconnected for intuitive and effortless adjustments on the fly. INTEGRATED HEEL CUPThe HEEL CUP is integrated, with a new design and low weight, reinforced to avoid deformation after prolonged effort and pressure. Anatomically shaped, it stabilises the foot when pedalling. The reflective inserts on the heel offer the athlete greater safety on the road and help to signal the cyclist's presence in poor visibility conditions RUBBER TOESThe upper part of the toe section is rubberised to repel impacts from stones or debris when cycling. It is made of non-slip rubber.MTB SR17 SOLELighter and more efficient is the new Sidi MTB sole made of nylon with PU inserts (polyurethane). The shape of the sole profile has been specially developed for mountain bikes, providing good grip, facilitating mud evacuation and offering the right stability. The central insert with the Sidi logo has an anti-slip effect and is particularly practical and useful for less experienced users. The toe area, which is subject to greater stress, especially when walking, can be replaced by screws and still offers the option of fitting crampons to improve traction on particularly muddy surfaces. SR17 represents the ultimate result in terms of d.