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Title: Four Flats - Three Days
Review: I just started using these tubes, although they were sized 26 X 1.9-2.35. I have rarely had problems with flats, and I ride ALL THE TIME! I rode three days straight and got four flat tires. The terrain I was riding was rocky, but not so much as to warrant flats at such an alarming rate.Additionally, the air valve is a very loose fit, but I was able to get air in the tires. I thought my pump was jacked up at first, took apart the pump, and re-inflated with same results. These tubes suck. Don't buy them.
