The Sidi technology used for mountain biking is applied to the gravel discipline with its most technical aspects in a high-performance, rigid shoe with a closure designed for comfort and control. -The Tecno-3 Push System dials in fit along the entire length of the shoe, adapting the upper to the shape of the foot for a customized fit -All new proprietary Sidi Wire material that is completely non-binding for intuitive and effortless on-the-fly adjustments -Like most Sidi small parts, the Tecno-3 System is serviceable and replaceable -The reinforced heel cup stabilizes and supports the heel. Anatomically shaped to reduce heel slip and increase power transfer -The toe box is rubberized to resist and deflect impacts from stones or debris when cycling -The Sidi MTB SR17 sole represents an ideal balance of stiffness for efficient power transfer and flexibility and comfort for walking -The toe inserts are easily replaceable and offer the possibility to mount spike for particularly muddy rides