Hybrid sport bike type men wheel size 28 inch model 2017 series scott sub cross frame material aluminium frame alloy 6061 aluminium frame geometry diamond bike frame sizes cm 45 48 51 55 59 cm frame sizes m l xl s colour grey braking system disc brake brakes tektro sch f17 brake disc diameter frontrear 160160 bicycle fork suspension fork fork zoom 189 d wheel travel 63 mm rear derailleur shimano altus number of gears 24 gear sy