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 105 front derailleur shimano 105 gear shift brake lever shimano 105 crankset cannondale hollowgram si front chain wheel teeth 5236