Racing bike type mens frame sizes xl l m bike frame sizes cm 48 51 54 56 58 61 cm colours black green model 2016 series cannondale synapse carbon frame material carbon fork material carbon gear system with derailleur number of gears 22 groupset shimano rear derailleur shimano ultegra derailleur model shimano 6800 front derailleur shimano ultegra crankset cannondale hollowgram si front chain wheel teeth 5034 rear chain wheel teeth 11 3