I don't think it's something wrong with me but the bike. My single speed roadbike never gave me problems and i did a 77.7 mile ride on it and this ride only totaled 49 miles. The bike was given to me by someone i know so i had to pretty much fit myself. I'll see about finding someone to help me fit it that knows more. I know i don't want a "touring fit" but i don't want a hardcore "race fit" either. More like something inbetween.