Commuter bike type mens wheel size 28 inch model 2017 series bergamont horizon frame material aluminium frame alloy 6061 aluminium frame characteristics internal cable routing frame geometry diamond bike frame sizes cm 48 52 56 60 cm frame sizes m l xl colours black grey brake type hydraulic rim brake brakes magura hs11 bicycle fork suspension fork fork suntour nex wheel travel 63 mm gear system with derailleur rear derailleur shimano