Sportbike Bar End Mirrors
I have a 2013 Ducati Monster 696 20th Anniversary Edition, which had 4.5" round mirrors that are supposed to have a traditional retro look to them. Many call them the Mickey Mouse ears, but I didn't mind the looks of them. I did, however, mind the lack of utility. They only showed me what was in the lanes to the left and right of me for a couple car lengths, and absolutely nothing at all directly behind me.
I looked up what other people had done on the Ducati forums, and saw that both Rizomas and CRGs were popular. I would have preferred oval mirrors, but I didn't want to shell out for Rizomas, so I got the CRG Hindsight LS. I mounted the mirrors on some Rhino Moto bar end sliders/mirror mounts, which are sized for CRG mirror clamps and worked perfectly.
I've ridden about 60 miles with them thus far, and vibrations haven't been an issue at city or highway speeds. The bar ends do add some weight and are supposed to reduce vibration, so I can't say how vibrations would be if the mirrors were clamped directly to the bars. That goes for different models of motorcycles as well, but air-cooled Ducati V-twins like mine aren't exactly known for smoothness. The glass of the mirrors seems like it displays reflections more clearly than the factory mirrors in spite of the slight convex shape to them.
Installation was easy, though like any sort of mirror without a friction-located ball joint, setting the mirrors can involve a bit of trial and error since you can't do it while in traffic. Vehicles in the mirrors appear smaller than in the stock mirrors, so determining make/model might be a bit more difficult (again, just the nature of the beast), but it's a fair trade-off to know where vehicles are around me without head checking.
Like other reviewers have mentioned, one of my mirrors does fold in more easily than the other, but neither has yet budged at highway speeds. The folding ability is a nice feature for those of us with tight garages, in addition to lane-splitting for which they're named after.