The s works redefines how a road shoe should perform our lightest stiffest bodygeometry shoe features unprecedented fit comfort and efficiency for racers in the pro peloton or riders who want the pinnacle of performance new sl2 fact carbon sole with a symmetric engineered design and torsionbox technology is optimised to create our lightest and stiffest sole 130 stiffness index full bodygeometry features in outsole and sl footbeds combine to reduce hot spots and improve kneefoot alignment