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: Are the tires 26" or 20"?
Document: We received the Kent Tandem Bike about two weeks ago. We purchased this bike so my oldest, who is autistic, could ride with the family (as opposed to going in shifts with one of staying home to watch him). The brakes needed a little adjusting and the wheels needed to be trued (slightly). The only complaint was with the tires. The stock tires are from a company called Duro. The size is 26 x 2.0 but they are squarer looking then round.
The shoulders of the tire come in contact with the ground and the center doesn't. It feels like this creates a lot of resistance as it did not coast well (even inflated to the maximum PSI of 45). Because of the square tire stance, the bike felt off cornering. I replaced the tires with Bontrager Solana balloon tires (26 x 2.35) and it made a world of difference. The Bontrager tires are rounded with only the center making contact with the road.
I called Kent customer service, and they were courteous and helpful, and immediately shipped two tubes. In the interim I put slime in both tubes to be able to test ride it. The bike rides very comfortably with the 26x2.125 tires. I joke that they look and ride like car tires. It is heavy, however, the gear ratio compensates, especially the granny gear for hills. The back seat is designed for any height. Standover is 20", front is approx 29".
Also, both the front and the rear saddle height is adjusted by loosening the clamps with user supplied hex wrenches. I would recommend buying a quick- release seat post clamp. You need a 28.6mm diameter model. I would also recommend replacing the very low end 45lbs max 26 x 2.0 tires with some narrower and higher capacity ones.It took me about two and a half hours with all the proper tools to completely assemble the bicycle.
Total cost of modificaiton: about $20. Write a comment if you want more details/pictures on this modification.
dont buy it, or you will get mad and smash it with a hammer.. or you can pay $ 100 at the shop for them to put together ( what a pain) .we plan to ride about 20 miles this weekend. hopefully, it wont broke down on the road ( cross my finger) !
You have to install seats, handlebars and the front wheel. It is about 95" overall, once assembled. I also ordered the "Avenir Cruiser Fender Set,Chrome, 26 Inch". They are a pain to install, but I believe they will fit, after some grinding and drilling. It makes a pretty cruiser. It is also the only bike I found that interested my wife in tandem riding.
It was a nice touch that the water bottle cages were included...it seems like less and less bikes are coming with these with them, so I'm viewing that as about a $20 &#34;freebie.&#34;After getting the bike assembled, I tested it out in the garage just by spinning the wheels. The front wheel seemed very, very slightly out of true.
I have had the tandem for about a month. As many of the reviews have said it is an inexpensive tandem that gets the job done. I am 5'9" and a fairly strong rider. My wife is 5'2" and rides very little. We have taken it out for a few 20 mile rides out for coffee and over all it has performed well. On the bad side, as a previous reviewer stated, there is no lubrication on the bike.
Bought the bike with low expectations as every review seems to have some different aspect of an issue with bike, as does mine. My issue is that the front fork is bent, requiring the front wheel to sit at about a 10 degree angle from vertical and the front brakes being adjusted to be skewed with the wheel to avoid scraping the wheel all the time. Went out and put 20 miles on her, bike did fine. The kickstand was an unexpected feature and it works great.
Answer: yes