Commuter bike types ladies mens wheel size 28 inch model 2016 series vermont rosedale frame material aluminium frame alloy 7005 aluminium frame geometry wave colours red green brake type v brakes brakes promax tx115 gear system internally geared hub igh rear derailleur shimano nexus number of gears 3 braking system rim brakes brake lever promax bl 46ap crankset prowheel rear chain wheel teeth 19 front chain wheel teeth 38 chain kmc z30