It was much slower than I usually go due to a lot of wind, some "barely a path" roads along the way, the bike being a citybike meant for daily shopping, as well as the fact that I was carrying 50kg (110lbs) of luggage on my back the whole way π
Excuses for being a slowpoke aside, it was a good challenge for my general health and fitness journey, and a very pleasant ride π
Ok, but the harness is designed to be worn upright, so the hip belt - which usually carries the load most effectively - cannot work properly because the backpack is exerts shear stresses on your spine, I fear. It obviously depends on how much leaned forward one rides, but itβs not the same as standing/walking.
In the end, you know your body better than anyone, just hope you consider well how you set up your bike :) take care and I wish you many good rides!