Bike touring bike type men wheel size 28 inch model 2016 series kona dew frame material aluminium frame alloy 6061 aluminium frame characteristics butted frame geometry diamond bike frame sizes cm 46 48 52 55 57 59 cm frame sizes xl s l m colours green black braking system rim brakes brakes promax fork kona project two rear derailleur shimano altus number of gears 24 gear system with derailleur front derailleur shimano tourney