Originally Posted by
JimJimex
Gotta disagree on that one. I'm 6' , 175lb and carry a 14-20lb backpack regularly on my 4-mile commute. Isn't really an issue...
It really depends on the "hug" quality of your backpack. I use tactical / military spec backpacks that are designed to load 50lb of gear, the pack evenly distribute the weight, and they 'hug' to your back really, really comfortably
To be honest, I don't even FEEL the pack unless I go to grocery trips and load it to ~40lb.
And the strength and age of your back
When hiking I use the waist support so weight isn't as much of a problem as a lot of it rest on my hips. On a bike that doesn't work. No matter how good the backpack is the weight is entirely supported by your back. You just happen to be stronger