Diadora x vortex pro mtb spd shoesdiadoras x vortex pro shoes are for cyclists who put down a lot of power very quickly and were built for one purpose cause a commotion on the trail the ultra stiff carbon fibre sole is outperformed only by the pro vortex road shoe registering 10 out of 12 on the stiffness index with that much power transfer a lot of the trail would normally come through the pedals and into your feet but the carbon fibre helps to diffuse vibrations while focusing power int