The SERUM frameset combines the three most important features for road bikes – extremely lightweight, high torsional rigidity and supple comfort. The frame sets a record weight level (780 gram without seat post) without limitations (allowed rider weight up to 120 kilogram). Press fit internal bottom bracket, hollow dropouts and SIMPLON invented DOUBLE CHAMBER tubes (carbon ribs inside the tubes for increased strength) guarantee a most direct force transfer and razor sharp steering handling. The refined SIMPLON VIBREX technology in seat tube and seat stays result in a riding comfort never experienced before in road bikes.