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 material carbon gear systems with electronic gear shifting with derailleur number of gears 22 groupset shimano rear derailleur shimano ultegra di2 derailleur model shimano 6870 front derailleur shimano ultegra di2 gear shift brake lever sh