I changed mine out to a 19 last fall for a long trip. It made highway speeds more enjoyable, lowered rpms about 500 and really cut down on vibrations at high speed. I don't look for that sixth gear anymore, it's still installed. I ride mostly around town here in KC and it hasn't been a problem at all in traffic. The only down side is that I don't drag HDs anymore.

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken