Triathlon bike type mens geometry classic racing frame sizes xl l s m bike frame sizes cm 51 54 57 60 cm colour black model 2017 series scott plasma frame material carbon fork material carbon gear systems with electronic gear shifting with derailleur number of gears 22 groupset shimano rear derailleur shimano dura ace front derailleur shimano dura ace crankset shimano dura ace front chain wheel teeth 5339 cassette shimano dura ace