Urban bike type mens wheel size 275 inch model 2017 series cannondale bad boy frame material aluminium frame alloy 6061 aluminium frame geometry diamond bike frame sizes cm 39 46 56 51 cm frame sizes m s l xs colour black brake type hydraulic disc brake brakes magura mt2 brake disc diameter frontrear 160160 bicycle fork suspension fork suspension fork feature lockout wheel travel 50 mm gear system internally geared hub igh rear