The Brooks B17 has quite a bit if rise from the midpoint to the back of the saddle. They're also somewhat slick because of the smooth leather. Those two characteristics cause you to either slide forward or sit on the very back end. Most people to adjust them such that the nose is pointed slightly up in the air, thus leveling off a larger platform on the back end of the saddle. This creates something of a "hammock" for your butt to ride in. It works ok that way as long as you don't want to ride in the drops for any length of time.