Cargo Bikes

I can’t decide exactly what angle to come at this, but 92kg (920N) force doesn’t sound like a lot. So assuming you laced the wheel 3-cross, at some point you’ll have two roughly parallel spokes vertically sharing the load. Pretty sure that means 180kg completely unloads the lower spokes. Let’s say you and some cargo onboard come to 120kg, it doesn’t take much of a bump in the road to completely unload the spokes and they start to come undone.

It’s not that simple because the tensile spoke loading and the hoop stress in the wheel is far more complicated than I’ve made it out to be, but I think it’s not far off in numbers.