It39s the frame of choice for team giant alpecin sprinters and breakaway artists they know it gives them an edge because it39s been proven through third party aerodynamic testing engineered and developed with aerosystem shaping technology which means every tube shape and angle is optimised for minimal drag the advanced sl grade composite frame is stiff and efficient yet still superlight best of all it saves you 12 36 seconds over a distance of 40km at a speed of 40kph compared to key co