Originally Posted by anthonya9999
What about control -- doesn't the extra weight on the frame reduce your control of the bike in turns, especially emergency maneuvers?
Think about it this way, the weight is on your bike whether it's on your frame or on your back. On your back the center of gravity is even higher and your mobility is decreased. You have to counteract the weight of the bike everytime you shift around or when the stuff in your bag shifts around.
My bike actually seems more stable with panniers -> of course it is heaviers.