My notes say 8.1/9.9 cubic feet, struck/heaped for both the 60" pin on bucket and the 66" QA bucket. I'm not sure where I got those numbers from so I can't guarantee them 100% but I was interested in this about a year ago when I converted my LA463 to the newer 463-1 with the L2230A quick coupler. I remember being surprised that they had the same capacity and different widths but the depth changes with the width.