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 green model 2017 series cannondale caad12 frame material aluminium frame alloy 6069 aluminium fork cannondale fork material carbon gear system with derailleur number of gears 22 rear derailleur shimano ultegra derailleur model shimano 6800 front derailleur shimano ultegra crankset fsa sl k light front chain whe