Racing bike type mens geometry classic racing frame sizes m l s bike frame sizes cm 47 50 52 54 56 59 cm colours white grey model 2017 series merida reacto frame characteristics internal cable routing 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 front chain wheel teeth 5236 rear chain wheel teeth 11