i have been doing quite a bit of cycling as the weather has warmed in my area. i am on a new road bike (cannondale) and during long rides, i am getting alot of lower back pain. the bike has me leaning forward in a very aggressive position. when i relax my position, it relieves the pain. i dont know much about cycle construction, but can i have the stem/headset switch out to bring the handlebars a little higher to solve this problem? any feedback would be appreciated.