Consider your intended use.. the wider bags not only are more difficult to maneuver in tight spots, but probably cost a few more MPG, at minimum. That is a lot of wind drag, and a very blunt rear end.. by comparison the stock bags are 12" narrower and taper in the back a little bit to smooth the flow at higher cruising speeds. Imagine the drag from a 12" wide by 16" tall flat plate held into the wind at 60 mph, lol. But for mostly offroad and backroad use I can see the advantage of the larger bags, for sure. Wind drag isn't a factor at 20 mph..