Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: Do these come in pairs for the price?
Document: we live in alaska and have plenty of snow all winter long and since we have a long winter thought i would give these a try. they are amazing and do the trick. lots of traction and dont slip at all. love them.
Worked great in the conditions I wanted to ride on , which was a frozen woods single track. Fun tire
We just went through the cold weather that shut down Alabama. I just continued to ride my bike. Riding on packed snow or ice I was always under control. On glare ice I can stop almost as fast as I do in the summer.The only reason I didn't give it five stars was the lack of information about choosing the number of  studs (none of the other makers did either).
Used on packed snow, hard ice and slushy snow/wet tarmac. I put one tyre on the front of a hard tail MTB and one tyre on the front of a rear wheel drive electric bike. Works much better than I expected. On ice it grips reliably safely if you go carefully, entirely useable where a normal tyre would be completely useless.
These tires were pretty great. I used them about 10 times (swapping, total about 25 - 30 days) this winter it was snowy or icy here, and I used them on a second set of rims I have so I could swap flat treads and these.They work well on ice. You should definitely note that they do not really make you track on ice, but they make you a lot less likely to slip and fall.
One really cool experience I had with them was my back tire slid out from under me but it caught before I could even re-act to the slide, totally exhilarating and what MTB is all about.
Moved to Montana last year and ditched my fenders, and replaced them with a set of these tires. My Blur now goes just about anywhere I point it, steering and rear tire grip are amazing. Deep fresh snow is still a little tough (rider skill? ), but when things firm up, I go wherever I want. These keep my winter training alive, and I'd recommend them to anyone whose cold feet don't keep them indoors.
I won't ride in the unsafest of conditions but I trust these with ice and frozen fog, I'll ride on about 45psi with caution. They do make a big difference on grip but ice is still ice and I share the road with cars so I don't push it. I'm determined to ride in any possible situation and these have really helped me, I hope they never change this product it's absolutely perfect. If these tires were available for snow bikes, I'd buy one.
I use some Kenda road tires on my mountain bike that are flat, and I can cruise about 15 mph with little trouble. These I can max out at about 10 if I push hard. They cut your speed greatly, which I guess isn't that bad given they aren't race tires, but give yourself extra time if you use these.
I ride with these tires October through April and they're still going strong. I use them for daily commuting everywhere averaging about 6 miles per day riding on asphalt. I've put about 1100 miles on them and I'm planning on riding them through at least one more winter, they aren't showing much of any wear yet, the studs are still sharp despite most of my riding is on wet pavement with no ice or snow. One tire has thrown one stud. I've not yet had a flat.
Answer: no