Simon,
On a summer camping tour through the Scottish borders to the Lake District coast with 2 of my sons I estimate my all up weight at over 130kgs.
Comprising :-
85 kgs - aged male rider wearing summer/winter kit (the weather varied) including SPD sandals or shoes.
25kgs - base daily load carried in 4 Carradice super c panniers & 1 stuffsack comprising tent, sleeping mat/bag/pillow, stool, Trangia with a gas converter, fuel, bowls/mugs, water carrier, clothes, tools, lock, first aid, toiletries, towel, washing up kit, bike spares, camera, money, maps, emergency rations, etc..
18 kgs - eXp with Rohloff, S&S couplings, Sun rhynos, Schmidt dynohub, lots of lights/reflectors, Brooks Conquest, Thorn racks, Schwalbe XR 2" folders, Full mudguards/flaps, 3 bottle cages, SPD pedals, Thorn handlebars, Ergon grips.
2 kgs - 3x750 ml drink bottles full at start of day.
??kgs - food bought and carried during day for lunch/evening/breakfast meals.
I probably carried more than my share of the luggage weight on this trip.
It was necessary to carry enough food & drink for only 1 day as you could guarantee to restock at the end of the day. During the day was sometimes possible, but there are great swathes of countryside which are now without a shop of any kind.
I would say that the eXp was totally underwhelmed by the load it was carrying.
I found the load to be quite tiring going up some of the hills and on the next trip managed to take about 3kgs less of some things.