Originally Posted by
SuperDave
I'm guessing 2 hours is a pretty good hard limit for a flat-bar hybrid; unlike a drop-bar bike, you have only one hold, one seating position. *Anything* held for two hours straight without shifting is going to hurt. Heaven knows I don't go that long at a stretch on my hybrid; even when I was riding centuries on it, I'd stop every hour or 1-1/2 and walk for a short bit, just for the position change.
My commute home from work is about 16 miles or so, and I incorporate hills on my route. One thing I noticed the past two days is my back bothers me mainly when I'm doing climbs and not so much on the flats. I have bar ends so I am able to adjust my positioning here and there, but the climbs are a bit more uncomfortable on the back.