Maybe because of my weight - I'm 6'1" and @ 250 - but I've never been able to ride comfortably more than about 25 miles or so. OK, I did 50 miles one time, but that was not exactly a "comfort" ride! Thought I'd try a different saddle and got a Rido R2. Seems to put the weight on the "sit bones" and so far it feels pretty good.