Aerosol generating article with light hollow segment

An aerosol-generating article for producing an inhalable aerosol upon heating, the aerosol-generating article comprising:

• a rod of aerosol-generating substrate;
• a hollow tubular segment at a location downstream of the rod, the hollow tubular segment being in longitudinal alignment with the rod, wherein the hollow tubular segment defines a cavity extending from an upstream end of the hollow tubular segment to a downstream end of the hollow tubular segment;
• a mouthpiece segment at a location downstream of the hollow tubular segment, the mouthpiece segment comprising a plug of filtration material and a mouth end recess downstream of the plug of filtration material;
• and
• a ventilation zone at a location along the hollow tubular segment less than 20 millimetres from a downstream end of the aerosol-generating article, the ventilation zone comprising one or more rows of perforations formed through a peripheral wall of the hollow tubular segment,
• wherein the hollow tubular segment has a length of about 25 millimetres,
• wherein a ratio between a weight of the hollow tubular segment and a volume of the cavity defined by the hollow tubular segment is less than 1 milligram/cubic millimetres, and
• wherein the rod of aerosol-generating substrate comprises at least an aerosol former, the rod of aerosol-generating substrate having an aerosol former content of at least about 12 percent on a dry weight basis.