Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: i want to purchase the allen 4 bike rack, we only have three bikes, but since 2 of them are 26' ladies bikes, is this adapter essential to fitting them?
Document: Works as advertised. I used three of these with the Allen Premium 4-Bike Hitch Mount (2&#34;) to get my wife's and kids' bikes to fit (my road bike doesn't need one). Worked fine on a 700 mi family road trip. Could use a bit of padding on the pin end to prevent scratching the bike's handlebar stem.
I just bought an Allen 5 bike hitch carrier. I didn't want to, but read and ordered 4 of these units. They look very well built. Work fine and were needed. In the case of 2 24 inch bikes ( for my smallest children), I had to raise the bike seat to get the proper angle. It's not he tension bar problem, but the bikes are too small. I made a very good choice with them. I recommend them.
Easy to put on any bikes. I put it on kids bikes and ladies bikes.Since it is spring loaded there is no wobble you get from other adjustable adapters. I have other adapter, which has a fork and a pin, and this one is much easier to put on and take off.If you have a small kids bike though, it might not work because there might not be enough space between seat and the frame.
Bought the Allen Sports 102S Premium Bike Rack (It worked Great) First time using a bike rack and the info made it seem like I needed 2 of these  - one for my granddaughter's bike and one for my Women's bike to mount them on the Allen Bike rack. Absolutely did not need them to mount either women's bike. The bikes went on fine, stayed on fine for 4 hour roundtrip to the beach. I am returning these as being totally unnecessary.
Bought a 2 bike Allen bike rack for my car. Noticed that the placement of a female bike on it was lopsided. Noticed that Allen created this bar to allow one to place a female bike on the rack the same way a male bike goes on. This purchase was cheap and just saves time and effort when loading bikes onto rack. Thanks Allen !
Good product that allows you to mount ladies bike to traditional bike rack. Very easy to install on bike and as easy to remove. Can't go wrong for price. Other brands are more expensive. Stick with the Allen adapter!
I was looking at other tension bars that were a bit more in price but decided to get cheap and get this one since I really won't be using it too much. I have an Allen 4-bike carrier and works well with it. I have used this once so far since buying it last month and traveled about 900 miles. I used it to carry my wife's heavy cruiser bike and worked well.
I purchased three of these to help mount 3 non standard bikes on my Yakima hitch bike rack. It took me only a few minutes to safely and easily mount two adult, one youth and one child bike. The adaptor hooks on easily , and provides a sturdy support for the bike. Prior to making this purchase, I could barely get three bikes on the the bike rack, with incredible difficulty. With the adapters, I can load and secure everything in a few minutes.
Bought three for my family, they fit adult's bikes but not kiddies' because the kiddie's bikes have very thick bike frames and are in odd shapes, which make very difficult to mount on the bike rack and this adapter doesn't help at all.
I bought two of these. They do work well, even fits my 6year olds bike so I can mount that on my yakima rack.But, I will say that I worry that something might happen and one of the bikes could fall off. It's hard to trust it completly since you are trusting a spring not to fail.I have a yakima bike tube adapter, and that thing is solid and excellent.
Answer: yes