Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: What is the difference between the wide and narrow versions?
Document: I have used both the narrow and wide versions of this product. I bought a narrow one locally and then bought the wide ones from Amazon. Review applies to both but I like the wide one better and replaced the narrow one on my carbon road bike with it.
I absolutely love this mirror. I have it mounted to my road bike and I really don't think it would work on any other style of bike, but that is just my opinion. It is completely unobtrusive, easy to install and adjust and it stays put. It gives you a wide angle rear view with only slight head movement when your leg is at the top of the peddle stroke - you are looking under your leg.
I like this mirror but not nearly as well as the bar end mirror I had to replace because I changed grips. Vision field width is very narrow and on a curve you don't see the road behind you. Going up and down hills I find I must alter my position to view the road behind me. Rear vision is only possible when leg/pedal is in raised position. However, I would purchase this mirror again because I am uncomfortable with no mirror at all.
I ordered this mirror as I did not want to have one that had a blurry image. Mounting this on the frame was easy, although not a perfect fit (although this isn't the product's fault, I guess that my frame is just a bit too wide), using the provided holding strips was easy enough. I was able to adjust it so I can clearly see what's coming behind me. I will place pictures :)
the mirror is good quality. no problems with install. you can only get a small view of whats behind you when you left leg is out of the way
outstanding product. as other reviews stated the best view is when you leg is up. all that is needed is a quick glance. there is less of a blind spot than on my car. i'm going to get another for a gift.
if you ride a road bike and want to see what's coming up behind you this is the mirror for you.
after getting used to it, it works ok. the field of view is limited and when the leg on the side its mounted on is down peddling it blocks your view
You have to stop peddling, keep your traffic side foot up (which for me, in the U.S., is the left foot), look down, and snatch a quick look. It's awkward and only gives you a "yep, there's something there" glimpse. I have two Wald folding baskets on my bike.
You cannot see if you are at the top of your pedaling stroke, but can see with you leg extended at the bottom of the stroke. It holds its adjustment very well. The only time I need to make adjustments are when I am in the aerobars vs on the hoods. I crashed at over 16MPH last week and did not need to adjust the mirror after getting back on the bike.
Answer: yes