The front wheel on most LWB carries much less of the load then the front of an SWB or upright.
Get two bathroom scales, put one under each wheel and sit on the bike. The rear wheel will carry about 75% of the weight. try the same with a SWB and an upright.
I was riding my Longbikes Slipstream when I hit a manhole cover going around a bend, don't know how I saved it, I got lucky I guess.
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Bentbaggerlen
"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." - Arthur Conan Doyle