I did 70km on this bike this summer http://i277.photobucket.com/albums/k...s/Bilde081.jpg Absolutely no problem. Not fast (dog needed a lift most of the time since it was HOT) but wery comfortable. Northroad type bars, B72 saddle. Nexus7.

Three weeks later I did much the same on a flatbar (w barends) bike. Bar 1 1/2"below saddle- Brooks Finesse t. Pulling a trailer instead of longtail. Not good, much pain in my lower back. I since put the same bars on this bike (rides much better now) and need to buy a broader saddle.