Sprintech Swiss-Made Convex Chrome-Plated Bike Mirror for Drop Bars – Hand-Finished, Adjustable, Reflective Surface, Durable ABS Housing, Universal Fit for Enhanced Rear Visibility (Red, Pair)

These pretty much do exactly what I wanted. They give me an idea of what is going on behind me so I don't have that "open the cupboard to find a spider" type reaction when a car buzzes by. I wasn't sure how easy they were going to be to get used to since they are on my drop bars, but within 2 days I found myself glancing down at them without even thinking. I do bump them out of position occassionally when I stop or lock up my bike, but that's no biggie.They definitely don't give you the type of rear view you get from car mirrrors, but if you buy the set of two, they have the potential to give you a decent view of what is happening behind you.You also cannot see very far behind you, but I don't ride on roads with speed limits over 35 mph, so these were exactly what I was looking for. I have the luxury of mostly riding on trails and/or roads with two lanes going each direction. I have found the mirrors particularly helpful when I'm the first one in line at a stoplight and a car pulls up behind me with a driver who wants to turn right on red. I'll do my best to inch over a bit so the driver can squeeze by, and hopefully improve the perception of solo cyclists in the eyes of car drivers. As for the group cyclists, those SOBs are on their own!Although these technically qualify as red, you can tell they are more of a reddish-orange when you put them up against a true red.UPDATE [9/20/17]: These mirrors are still going strong. They have a few scratches, but have really held up quite well for plastic mirrors. I also found out, to my surprise and dismay, that they give me better visibility if you put them in the opposite way from what you see in most images. Maybe that's not your cup of tea, but I found it much easier to get a broader view this way, and I won't be going back to installing them the "correct" way. The attached picture is how they look today.UPDATE [11/9/2019]: Even after 6 years, these are still in amazing shape. I can't even imagine riding without them anymore. Going to build a new bike next year, and will definitely be getting another pair.

I have one of these on each side of all my bikes (3). They are great for safety, which is why you would buy any mirror, they don't get in the way in any direction (top or sides) and they do the job they are meant for. Some mirrors stick out the sides and make the bike wider so fitting the bike through a tight space can become annoying. Others take up valuable space on your handlebars. These are out of the way, easily installed in about 5 minutes and show everything behind you. The reason why I like having them on both sides is because sometimes when rounding a curve in the road, a car can actually be on the right in your rear view, and it can also be good for locating a fellow rider behind you. They are a little pricey but their lack of posts and other contraptions mean they are much less prone to breaking or other damage and I highly recommend them.

Does its job and stays in place. I didn't want big intrusive mirrors and I have no space on my handlebars or stem to mount anything else (cycle computer, headlight, and phone holder occupy all that space). So I needed mirrors that mount in the ends of the bars. They stay in place even on bumpy roads. Occasionally I'll knock one with my knee, but it's easily restored to its location.

No se ve muy bien atrás ,especialmente si el vehículo viene muy rápido

Light weight easy to install. Just remember to wet the plugs prior to install makes them go in easier. Easily adjustable and they work. You won’t get auto style rear view but you will be able to see a car coming up on you.

I was worried it would be too convex and cars would be on top of you before you saw them but its a good blend between field of view and seeing far enough behind you. Car with DRLs are appreciated! Easy to adjust and stays unless you bump it.

The caps are very difficult to install. The manufacturer recommends wetting them, which I did. I also wetted the inside of the handlebars. You still have to use a tremendous amount of force to get the caps in. I finally managed to get one of them in, but the other one broke at the head. Furthermore, I can't figure out how to get an extra cap. As a result, I can't recommend this product. There are better and cheaper alternatives.

Install directions are on the package, but not easy to find. Wetting the insert prior to installing makes a big difference. Once installed, they work well. They are not in the way when loading. So far, so good.