Commuter bike type mens wheel size 28 inch frame material aluminium frame alloy 6061 aluminium frame geometry diamond colour black brakes promax tx 115 rear derailleur shimano nexus number of gears 8 braking systems coaster brake rim brakes crankset prowheel cassette shimano chain kmc z610 front wheel hub shimano dh 3n20 tyres schwalbe silento ii stem aluminium handlebars moon cruiser aluminium saddle brooks flyer weight 1867 kg featu