Though I haven't actually used this WTB TPU tube on a wheel yet, I've been carrying it as a spare in my bike's saddlebag, and at least for that purpose, I think it's great. This TPU tube can fold up into a very small shape, and it feels very lightweight as well, compared to the traditional butyl tubes.
Additionally, the tube's packaging includes a couple of patches and alcohol wipes for repairing punctures, if that would ever be needed.
I am giving 5 stars for overall rating because I like it better than 2 other brands of TPU I've tried (Tubolito, Rene Herse.) Both of the other brands had one of the 2 tubes defective. WTB was easy to install. I have punctured twice however. 1st time a tiny thin wire went thru a thin, not puncture resistant tire. I don't fault the tube. I patched it successfully with one of the 2 included patches. I think it's great that they include these. The 2nd flat was caused by the same wire! I know, my stupid mistake. I did find the tiny cut, and looked for the sharp object. Did not find it until looking the 2nd time. I patched it successfully the second time. I had the 2nd patch that came with the tire, but used a Park instant patch instead. I wanted to try it to see if it worked, as some people have said it likely would. It's working.
I had to change to more durable tires because of so many flats. I put on a heavier tire and then used the WTB NanoAir TPU tubes because of the light weight. The net effect was slightly lighter weight and NO FLATS.
Very good puncture resistance. Cant believe how well it has held up after a few gravel rides.
