Originally Posted by
BobbyG
I wear my back pack when riding my rackless old road bike to work. I leave the straps long and let the bag rest on the small of my back, just above the tailbone. Not only does that keep the bag and it's weight from pulling on my shoulders, but it allows for air circulation along my upper back.
It sometimes feels like the bag may fall off to the side, but it never does, even when reaching for the downtube shifters.
I ride upright so that's much closer to what the backpack is designed for. I usually put it on the front rack anyway, but to be clear the strap doesn't go around the body. It's just a support, it works a bit like a spring and somehow transfers all the load on the lower body where you don't feel it. The right one is how it looks.
