I run a 29er with Ralph's Shwalbe (evo, skinny, light tires). I got a bite from a sharp rock a few weeks ago. The Stans wouldn't seal it. I put the phone on and walked on. The tire was fairly new and I really didn't want to leave a tube in it. I searched the internet for a tire patch and found this one. I've used many stubs in other tires (car tires, lawn mowers, etc.) and have had great luck. Because of the price, I decided to try them. I removed my tube, added some racks, pumped up the tire and installed the plug. It was a bit difficult to get him to stop, mainly because the tires have such a thin casing. I didn't think the plug would hold. I rode an SS hardtail about 25psi today for 20+ miles and the plug held up with no issues. I've ridden streams, rocks and fast singletrack. Time will tell, but so far I'm happy. I think they are great if you have a big flat tire. I don't think I'll leave my camera at home, but they can save you time and money by letting you keep driving the tire without ripping it off for a patch. Especially when tires are $70! I think they will work well on tires with a heavier casing.
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