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: What are the tires made out of?
Document: Love the design and size, the tire tubes are problematic. Ordered the version without the pump. Came, went together easily except the challenge of finding a pump to fit (valve extenders made it much easier). Inflated the tires to the recommended 30psi and it worked great on my canoe (after I bought a couple more straps). Took it to the mountains. While while we were sitting in camp we heard a hissing.
I wouldn't necessarily call this a ultra durable heavy duty item, but the quality is fine for my needs. When you consider the price and compare to the more expensive options out there, a nice canoe/kayak cart all in all. I read the reviews about the unit not coming with straps, so I purchased bungee cords and that seemed to work just fine. I gave this a four star rating since the tires were somewhat narrow and it made the trips over soft sand a bit of a struggle.
I am using this to move a Sunfush 14' sailboat off the beach to the water. First the strap broke the day I started using the product. Please start making your strap attachments with metal (its made with really cheap flimsy pvc plastic), it will greatly improve the quality of your product. Secondly the tires are a bit small, though I am sure I can put bigger sand style tires on it would have been nice to have that as an option at purchase.
Very well made product. I read that some of the complaints about it was that it didn't come with a strap.Mine did come with its own tie down strap.Very compact and sturdy,will definetly do the job.
I didn't even know they made things like this, but it is awesome. Even if your canoe is right on the water, its still not a bad idea to buy one.
Made of tubular aluminium, (strong enough). The grooves in the plastic pivot inserts are not aligned correctly when the frame is open or shut. Easy to dismantle and file for a correct fit(for a semi-locking effect in the open/closed positions). Very good price.
Mine is just bolted with one bolt and putting pressure on this bar when loading the canoe could bend the shaft. I think by using two ratchet straps hooked on opposite tubes, you may solve this this problem. I guess I made mine work, but there better products out there. It's your money.
This canoe cart has a tendancy to twist of the canoe/kayak when a wheel comes in conact with any obstruction such as a rock or bump. Mine did not come with anything to hook it up to canoe or any directions on how to hook it up. The first time I hooked it up, I used a ratchet strap of my own and made sure to hook the ends on opposing frame tubes on the cart.
As others have noted, there really is no clear place to secure the included strap. I ended up tying the strap to the frame on each side. The first time I used the cart one of the buckles broke as I was tightening it. I made a loop in one side, and used a trucker's hitch on the other to make it work. I had a bit of a problem with the kayak shifting around and dog-legging down the trail.
The tires do have plastic rims, but as long as one does not overly abuse them, I do not see how they could break.
Answer: yes