I wouldn't put cases (and even less, a top case. Ha ha) on my bike, even if free. Heck, not even if I got paid. My ex-RT handled like crap with them (and weaved in fast corners), so used them just once. They made the bike ultra wide too. And a top box would be an even worse choice for me; HATE those things. Ha ha. Plus I always ride solo, so no passsenger benefit. So yes, to each his own . I'd agree with you if we had a giant duffle bag strapped, and ugly soft bags on the side. But to just pack a water bottle, extra pair of gloves, and an extra liner, and/or rain gear, all you need is a tail bag. And you can go top speed with it, if you wanted.