RE:RE:RE:RE:RE:RE:RE:Look At Darts WorkSuper-B can weigh up to 63 tonnes, so depening on the tare (empty) weight of the unit (usually a bit under 20 tonnes) you are looking at hauling closer to 43-45 tonnes per load. Lightest Super-B I drove was a bit over 18,000 kgs tare.
I have watched trains go by and read the weights printed on the side before but for the life of me can't remember what they are, I would assume 100 tonnes would be close enough though.