Cyclocross bike type mens geometry sloping comfort frame sizes l s m bike frame sizes cm 48 49 51 54 57 59 cm colour green model 2017 series kona rove frame material steel frame characteristics butted fork kona fork material crmo gear system with derailleur number of gears 22 groupset sram rear derailleur sram rival gear shift brake lever sram rival crankset sram s350 front chain wheel teeth 40 cassette sram pg 1130 chain s