7/16/22: The 1st mirrors I installed on my Espin E-Bike were good quality convex 3" round bar-end mirrors. However, they were too small for my older eyes to easily see if a car was coming behind me. So I switched to these larger Evomosa oval-ish mirrors. They too are slightly convex for a wide field of view, but mainly they are just plain big (3.3 X 5.1 inches). I also find the semi-oval shape very appropriate for a motorcycle rear view mirror. I use them in the horizontal orientation. The mirrors are not tinted (which give a clear view at twilight).The mounting hardware is of good quality and is easy to install and use. The adjustment friction is adjustable, but I found it just right out of the box -- Quite stiff so the mirrors do no move if bumped, but readily positioned with a firm hand. The price is no higher than other bar-end mirrors. Amazon delivery was quick. I gave these large mirrors 5 stars. DBThe mirrors are great. Look good. Excellent visibility. But they do not expand enough to fit 1" bars. Had to make adapters to fit.i read the reviews on these before purchase, and thought i would give them a try...Awesome, they are part of my motorbike now, and always will be .. excellent quality, not too big, not too small, very well designed, and sturdy.I was looking for a larger mirror that would be close in size to the bar end mirrors that come on some of the new Triumphs. These fit the bill perfectly and at a fraction of the cost of OEM Triumph mirrors.good quality, but the mirrors are huge.