I bought a pair of these for a 24hr time trial. Used with 700x25 Conti GP5000s the ride was noticeably cushier and seemed to have less rolling resistance.
Won the race and set a course record. Guess they worked
I use the Presta version on my mountain bike and the Schrader valve version on my klunker. Goathead thorns are a problem here no matter what you run, so I canï¿½t fault them for picking up a flat from them.
This is the cheapest and highest-impact improvement you can make on ride quality as long as you are willing to put a little air in your tires before you go out. A longtime user of latex-tubed sew-ups, I recently switched bikes and found myself on factory-issue clinchers. They rode like rocks. It's getting really hard to find tubular rims these days, so I did the next best (and cheaper) thing and got these latex tubes along with good-quality tires (Continental GP5000). Latex installs just like any other tube, there's nothing complicated here. And the difference is enormous. Yes, you will have to top up the pressure from day to day, that's just how latex works. But you'll never go back, guaranteed.