Sometimes bring laptop and files home from work in a rucksack, and I've got a few steep hills to get up on the way home, definitely slows me down up those. Which it should do. Not so different on the flat, again as you would expect.
Main problem for me is I hate riding with the load on my back, and dont do it often enough to want to fit panniers.
Main problem for me is I hate riding with the load on my back, and dont do it often enough to want to fit panniers.