Originally Posted by ronopolis

I built a new road bike last spring, set up with Mavic Ksyrium UST, and Mavic Yksion pro tires tubeless. I'm not kidding, I checked my GPS: 2.1 miles into my very first ride I run over something, front tire is spewing sealant, and eventually seals. It took a lot longer than expected to seal, but finished the ride. Over the next 700 miles or so last year, that puncture would occasionally open up, and would re-seal.