Racing bike type mens geometry classic racing frame sizes xl l s m bike frame sizes cm 50 52 54 57 59 cm colour black model 2017 series giant propel frame material carbon fork material carbon aluminium gear system with derailleur number of gears 22 groupset shimano rear derailleur shimano 105 front derailleur shimano 105 gear shift brake lever shimano 105 crankset shimano 105 front chain wheel teeth 5034 bottom brackets press fi