Folding bicycle handlebars flat bar rear chain wheel teeth 11 30 approximate folding time 15 seconds folded size 30 x 77 x 64 cm 117 x 30 x 25 inch one frame size only wheel size 20 inch series dahon d7 colours blue white frame material steel frame alloy crmo braking system rim brakes brakes promax gear system derailleur number of gears 7 weight 125 kg rear derailleur dahon neos rapidrise crankset aluminium chain kmc z50 rims alu