The Supermarché can carry up to 300 lbs. (136kg) plus the rider.  Payload is 220 lbs. for the front rack (99.7 kg) and 80 lbs. (36.3kg) for the rear rack.  That’s a couple of kegs up front and a pile of wood on the back.  Or that’s two kiddos, the family pet, groceries for a week, backpacks, gym clothes and a watermelon up front and a couple of cases of Lagunitas on the back.