Well a fair bit! Here is my shopping trolley -
and here it all is in the trike -
In fact there is room to spare as I can still put another layer of bags on top of what you see here. Todays load was probably half what I have carried in the past. It is just a shame the trip home when I am loaded up is mostly uphill! My trip computer records it as 3.2km with a time of 19.5 minutes so average speed is just under 10km/h. One long uphill stretch is done in my lowest gear with the Mountain Drive engaged at a speed of about 4km/h - easy pedaling but only walking pace! As a comparison on the way to the shops when empty I can do it in 12 minutes averaging about 16km/h.