Racing bike type mens geometry classic racing frame sizes xl l s m bike frame sizes cm 48 50 52 54 56 58 60 63 cm colour black model 2017 series cannondale supersix evo frame material carbon fork cannondale fork material carbon gear system with derailleur number of gears 22 rear derailleur shimano dura ace front derailleur shimano dura ace gear shift brake lever shimano dura ace crankset cannondale hollowgram sisl2 front chain whe