Folding bicycle wheel size 20 inch colour silver folding time 15 seconds dimensions folded 28 x 66 x 81 cm frame material aluminium frame alloy 7005 aluminium braking system rim brakes gear system derailleur number of gears 7 weight 124 kg rear derailleur shimano tourney derailleur model shimano tx35 shift lever sram chain kmc z51 tyres dahon rotolo maximales fahrergewicht 105 kg features with luggage rack with mudguards