Diadora speed vortex spd sl road shoes the speed vortex is a lightweight road shoe packed with features to improve your ride and your performance the suprelltech upper is comfortable and durable whilst the carbon reinforced sole provides stiffness and increases power transfer this is a great race shoe thats also happy on long rides the speed vortex features a morpho am cage upper which is constructed from an anti stretch air mesh and highly breathable suprelltech microfibre this ensures